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research-article | 17-March-2020

Characterization of root-knot nematodes infecting mulberry in Southern China

Root-knot nematode disease has dramatically impacted Morus alba L. production in Japan, India, and Brazil (Hida and Zhu, 1985; Sujathamma et al., 2014; Paestakahashi et al., 2015). According to Wang and Chen (1989a, 1989b), root-knot nematodes cause mulberry leaf loss of 20 to 45%, with severe cases reaching over 75% in some fields (Wang and Chen, 1989a, 1989b). Leaf quality can also be negatively impacted by this pathogen. Root-knot nematodes on mulberry in Japan have previously been

Pan Zhang, Hudie Shao, Chunping You, Yan Feng, Zhenwen Xie

Journal of Nematology, Volume 52 , 1–8

research-article | 17-March-2020

Genome sequence of the root-knot nematode Meloidogyne luci

Root-knot nematodes (RKN) from the genus Meloidogyne parasitize a wide range of host plants and have a global distribution. They are considered the most important group of plant-parasitic nematodes (Jones et al., 2013). Field infestations result in economic damage due to reduction or loss of crop yield with estimated global annual losses of $110bn (Danchin et al., 2013; Bebber et al., 2014). Among RKN, the tropical species belonging to Meloidogyne Clade I reproduce asexually by mitotic

Nik Susič, Georgios D. Koutsovoulos, Cristian Riccio, Etienne G. J. Danchin, Mark L. Blaxter, David H. Lunt, Polona Strajnar, Saša Širca, Gregor Urek, Barbara Gerič Stare

Journal of Nematology, Volume 52 , 1–5

research-article | 30-November-2020

Evaluation of root-knot nematode resistance assays for sugarcane accession lines in Australia

Plant-parasitic nematodes are major constraints to sugarcane production worldwide (Ramouthar and Bhuiyan, 2018). In Australia, plant-parasitic nematodes cause 5 to 20% yield loss per year, costing over $80 million in productivity (Blair and Stirling, 2007). The most important nematodes of sugarcane in Australia are root-lesion nematode (Pratylenchus zeae) and root-knot nematode (Meloidogyne javanica). Meloidogyne javanica is primarily abundant in sandy soil and can cause significant yield loss

S. A. Bhuiyan, K. Garlick

Journal of Nematology, Volume 53 , 1–11

research-article | 30-November-2020

Genome sequence of the coffee root-knot nematode Meloidogyne exigua

Root-knot nematodes (RKN) parasitize a wide range of host plants and have a global distribution. They are considered the most important group of plant-parasitic nematodes (Jones et al., 2013). Several Meloidogyne species can attack coffee plants, but only Meloidogyne exigua (Goeldi, 1892) has a significant impact on coffee production. This pathogen is the most widely distributed nematode in the coffee production areas in Central and South America (Campos and Villain, 2005), with estimated yield

Ngan Thi Phan, Guillaume Besnard, Rania Ouazahrou, William Solano Sánchez, Lisa Gil, Sophie Manzi, Stéphane Bellafiore

Journal of Nematology, Volume 53 , 1–6

research-article | 29-March-2019

First Report of the Peach Root-Knot Nematode, Meloidogyne floridensis Infecting Almond on Root-Knot Nematode Resistant ‘Hansen 536’ and ‘Bright's Hybrid 5’ Rootstocks in California, USA

The peach root-knot nematode, Meloidogyne floridensis, is recognized as an emerging pathogen of commercial peach production because of its capability to overcome root-knot nematode resistance in rootstocks. This nematode was first described in Florida where it was found in 16 counties (Brito et al., 2015; Brito pers.comm). Although it was reported to infect peaches in 1966, the peach root-knot nematode was only described as a new species in 2004 (Handoo et al., 2004). In Florida, M. floridensis

Andreas Westphal, Zin T. Z. Maung, David A. Doll, Mohammad A. Yaghmour, John J. Chitambar, Sergei A. Subbotin

Journal of Nematology, Volume 51 , 1–3

research-article | 30-November-2020

Report of the Texas peanut root-knot nematode, Meloidogyne haplanaria (Tylenchida: Meloidogynidae) from American pitcher plants (Sarracenia sp.) in California

During February and May 2021, several potted American pitcher plants (Sarracenia sp.) with roots galls induced by root-knot nematodes were collected from a botanical garden in Los Angeles County, California. Based on the analysis of several molecular markers, the root-knot nematode extracted from the galled roots was identified as the Texas peanut root-knot nematode M. haplanaria (Eisenback et al., 2003) in the Nematology Laboratory, Plant Pest Diagnostics Center, California Department of Food

Sergei A. Subbotin

Journal of Nematology, Volume 53 , 1–7

Research Article | 03-September-2018

Nematode Genome Announcement: A Draft Genome for Rice Root-Knot Nematode, Meloidogyne graminicola

The rice root-knot nematode Meloidogyne graminicola has emerged as a devastating pest of rice in South-East Asian countries. Here we present a draft genome sequence for M. graminicola, assembled using data from short and long insert libraries sequenced on Illumina GAIIx sequencing platform.

Vishal Singh Somvanshi, Madhura Tathode, Rohit Nandan Shukla, Uma Rao

Journal of Nematology, Volume 50 , ISSUE 2, 111–116

research-article | 24-April-2020

First report of southern root-knot nematode, Meloidogyne incognita, infecting pomegranate, Punica granatum, in Peru

et al., 2018). Among the plant-parasitic nematodes, the most important the genus is Meloidogyne Göldi, 1887, which causes damage in the form of root galls and reduction in the number of roots, and predisposition to fungal and bacterial diseases causing losses in crop yields (Karssen, 2002; Sikora et al., 2018). Furthermore, root-knot nematodes often thrive and cause damage on perennial hosts for many years preventing them from reaching their full yield potential. The root-knot nematodes

Ricardo Andreé Vega-Callo, María Yaquelin Mendoza-Lima, Nataly Ruth Mamani-Mendoza, Leslie Sharon Lozada-Villanueva, Juan José Tamo-Zegarra, Teodocia Gloria Casa-Ruiz, Cristiano Bellé

Journal of Nematology, Volume 52 , 1–3

research-article | 30-November-2020

First report of rice root-knot nematode, Meloidogyne graminicola, infecting Juncus microcephalus in Brazil

graminicola Golden and Birchfield, 1965, root infestation symptoms on South American rush (Juncus microcephalus Kunth). Root-knot symptoms of galls of J. microcephalus from the field (A, B) and in the greenhouse (C, D). This species was identified from esterase using esterase phenotypes (n = 20 females) (Carneiro and Almeida 2001; Carneiro et al., 2000), morphological measurement of second-stage juveniles (J2) (n = 20), females (n = 10) and males (n = 10), and perineal patterns (n = 20) and through the

Cristiano Bellé, Paulo Sergio dos Santos, Tiago Edu Kaspary

Journal of Nematology, Volume 53 , 1–4

research-article | 13-April-2020

Root-knot nematodes demonstrate temporal variation in host penetration

Pseudomonas syringae pv. tomato DC3000 (Bhardwaj et al., 2011), spore formation, and spore dispersal of fungal pathogen Hyaloperenosposra arabidopsidis is regulated by host circadian rhythm (Wang et al., 2011). Attachment and motility of bacterial pathogen Agrobacterium tumefaciens to tomato roots follow a diurnal pattern (Oberpichler et al., 2008). Root-knot nematodes (RKN) infect almost all cultivated plants and are one of the most damaging plant-parasitic nematodes causing devastating agricultural

Shova Mishra, Peter DiGennaro

Journal of Nematology, Volume 52 , 1–8

research-article | 30-November-2019

First report of root-knot nematodes (Meloidogyne species) infecting Chinese Elm (Ulmus parvifolia) in Florida, USA

M. R. Moore, J. A. Brito, S. Qiu, C. G. Roberts, L. A. Combee

Journal of Nematology, Volume 52 , 1–4

research-article | 30-November-2020

First report of northern root-knot nematode, Meloidogyne hapla (Chitwood, 1949) on strawberry in Turkey

dense population of second-stage juvenile. Several plant-parasitic nematode species were reported to cause damages in strawberries, and the northern root-knot nematode (RKN) Meloidogyne hapla (Chitwood, 1949) and the northern root-lesion nematode (RLN) Pratylenchus penetrans (Cobb) (Filipjev and Shuurmans Stekhoven) are the most harmful nematodes worldwide (Bélair and Khanizadeh, 1994; Brown et al., 1993; Nyoike et al., 2012; Samaliev and Mohamedova, 2011). Foliar nematodes, such as Aphelenchoides

Adem Özarslandan, Dilek Dinçer, Şefika Yavuz, Ayşenur Aslan

Journal of Nematology, Volume 53 , 1–4

research-article | 30-November-2019

Reproduction of Meloidogyne enterolobii on selected root-knot nematode resistant sweetpotato (Ipomoea batatas) cultivars

Sweetpotato (Ipomoea batatas (L.) Lam) is a major crop in the southeastern USA and a staple food in many tropical countries around the world. Root-knot nematodes (RKN) (Meloidogyne spp.), particularly M. incognita (Kofoid and White, 1919) Chitwood, 1949, cause significant suppression in yield and root quality of sweetpotato (Lawrence et al., 1986; Clark et al., 1992). Most recently, there has been an outbreak of M. enterolobii (Yang and Eisenback, 1983), Pacara earpod tree RKN (Yang and

Janete A. Brito, Johan Desaeger, D.W. Dickson

Journal of Nematology, Volume 52 , 1–6

research-article | 30-November-2020

Recombinase Polymerase Amplification assays for detection of the major tropical root-knot nematodes

The root-knot nematodes (RKN) of the genus Meloidogyne represent one of the most damaging and agriculturally important groups of plant-parasitic nematodes. Meloidogyne incognita, M. javanica and M. arenaria are three major tropical RKN species, which are globally distributed and polyphagous pests of many agricultural crops. These nematodes together with several other species are commonly referred to the tropical RKN complex (Álvarez-Ortega et al., 2019). Early and rapid detection of RKN in soil

Sergei A. Subbotin, Julie Burbridge

Journal of Nematology, Volume 53 , 1–11

research-article | 24-April-2020

Differences in parasitism of root-knot nematodes (Meloidogyne spp.) on oilseed radish and oat

Root-knot nematodes (Meloidogyne spp.) are obligate, sedentary endoparasites that can infect both the below- and above-ground parts of many crops at different developmental stages. Meloidogyne spp. are serious pathogens of multiple vegetable crops in the southern United States and worldwide (Johnson et al., 1992; Jones et al., 2013; Hajihassani, Davis, and Timper, 2019; Hajihassani, Rutter, and Luo, 2019). In Georgia, more than 66% of vegetable growing areas are infested with at least one

Negin Hamidi, Abolfazl Hajihassani

Journal of Nematology, Volume 52 , 1–10

research-article | 19-March-2020

Effect of an Alltech soil health product on entomopathogenic nematodes, root-knot nematodes and on the growth of tomato plants in the greenhouse

root-knot nematodes (RKN) are widely spread and highly damaging (Zakaria et al., 2013). The four predominant species are Meloidogyne arenaria, M. incognita, M. javanica, and Meloidogyne hapla (Jones et al., 2013). De Waele and Elsen (2007) have reported the difficulty in controlling the damage caused by Meloidogyne species due to their short life cycle and broad host range. Biological control is a highly preferred, effective, non-polluting, and environmentally safe approach that should be

Anusha Pulavarty, Karina Horgan, Thomais Kakouli-Duarte

Journal of Nematology, Volume 52 , 1–10

Research Article | 03-December-2018

Broad-based root-knot nematode resistance identified in cowpea gene-pool two

Cowpea (Vigna unguiculata L. Walp) is an affordable source of protein and strategic legume crop for food security in Africa and other developing regions; however, damage from infection by root-knot nematodes (RKN) suppresses cowpea yield. The deployment through breeding of resistance gene Rk in cowpea cultivars has provided protection to cowpea growers worldwide for many years. However, occurrence of more aggressive nematode isolates threatens the effectiveness of this monogenic resistance. A

Arsenio D. Ndeve, William C. Matthews, Jansen R. P. Santos, Bao Lam Huynh, Philip A. Roberts

Journal of Nematology, Volume 50 , ISSUE 4, 545–558

research-article | 06-March-2020

First report of Meloidogyne enterolobii infecting Japanese blue berry tree (Elaeocarpus decipiens) in Florida, USA

M. R. Moore, J. A. Brito, S. Qiu, C. G. Roberts, L. A. Combee

Journal of Nematology, Volume 52 , 1–3

Research Article | 17-October-2018

NMR Analysis Reveals a Wealth of Metabolites in Root-Knot Nematode Resistant Roots of Citrullus amarus Watermelon Plants

Citrullus amarus (CA) (previously known as Citrullus lanatus var. citroides) accessions collected in southern Africa are known to have resistance to root-knot nematodes (RKN) and are suitable rootstocks for grafted watermelon. The objective of this study was to conduct a comparative metabolomics analysis and identify unique metabolites in roots of CA accessions versus roots of watermelon cultivars (Citrullus lanatus (Thunb.) Matsum. and Nakai var. lanatus; CL). Nuclear magnetic resonance (NMR

Mihail Kantor, Amnon Levi, Judith Thies, Nihat Guner, Camelia Kantor, Stuart Parnham, Arezue Boroujerdi

Journal of Nematology, Volume 50 , ISSUE 3, 303–316

Article | 24-July-2017

Management of Root-knot Nematode (Meloidogyne incognita) onPittosporum tobira Under Greenhouse, Field, and On-farm Conditions in Florida

Root-knot nematodes are important pests of cut foliage crops in Florida. Currently, effective nematicides for control of these nematodes on cut foliage crops are lacking. Hence, research was conducted at the University of Florida to identify pesticides or biopesticides that could be used to manage these nematodes. The research comprised on-farm, field, and greenhouse trials. Nematicide treatments evaluated include commercial formulations of spirotetramat, furfural, and Purpureocillium lilacinum


Journal of Nematology, Volume 49 , ISSUE 2, 133–139

research-article | 30-November-2020

Enhanced biological control of root-knot nematode, Meloidogyne incognita, by combined inoculation of cotton or soybean seeds with a plant growth-promoting rhizobacterium and pectin-rich orange peel

Cotton (Gossypium hirsutum L.) and soybean (Glycine max L.) are economically important crops in the United States and worldwide. In the U.S. alone, cotton yield in 2018 was 18.4 million bales, and soybean yield was 4.54 billion bushels (Anonymous, 2018). Meloidogyne incognita (Kofoid and White) Chitwood, the southern root-knot nematode, is broadly distributed in soils cultivated with cotton (Xiang et al., 2017b) and other crops (Huang et al., 2016), and causes economically significant yield

Mohammad K. Hassan, Kathy S. Lawrence, Edward J. Sikora, Mark R. Liles, Joseph W. Kloepper

Journal of Nematology, Volume 53 , 1–17

Article | 24-July-2017

Methyl Bromide Alternatives for Control of Root-knot Nematode (Meloidogyne spp.) in Tomato Production in Florida

The following work was initiated to determine the scope of application methodology and fumigant combinations for increasing efficacy of 1,3-dichloropropene (1,3-D) and metam sodium for management of root-knot nematodes (Meloidogyne spp.) in Florida. A series of five experiments were set up during spring and fall seasons to evaluate the potential of different fumigants, alone or in combination, in polyethylene film tomato production. The most promising chemical alternatives to methyl bromide, in


Journal of Nematology, Volume 49 , ISSUE 2, 140–149

Article | 21-July-2017

Resistance to Southern Root-knot Nematode (Meloidogyne incognita) in Wild Watermelon (Citrullus lanatus var. citroides)

Southern root-knot nematode (RKN, Meloidogyne incognita) is a serious pest of cultivated watermelon (Citrullus lanatus var. lanatus) in southern regions of the United States and no resistance is known to exist in commercial watermelon cultivars. Wild watermelon relatives (Citrullus lanatus var. citroides) have been shown in greenhouse studies to possess varying degrees of resistance to RKN species. Experiments were conducted over 2 yr to assess resistance of southern RKN in C. lanatus var


Journal of Nematology, Volume 48 , ISSUE 1, 14–19

research-article | 30-November-2019

Biological control of Meloidogyne spp. in glasshouse-grown chrysanthemum

Root-knot nematodes (RKN; Meloidogyne spp.) are a worldwide problem in the cultivation of both fruit and vegetable crops (Jones et al., 2013). There are approximately 100 different species of Meloidogyne (with new species being described often) (Jones et al., 2013) and specific species or “races” usually parasitize only a select range of host plants (Moens et al., 2009). The life cycle of RKN lasts approximately 30 days, depending on species and environmental conditions (Ploeg and Maris, 1999

J. R. De Long, M. A. Streminska, A. Persijn, H. M. I. Huisman, C. van der Salm

Journal of Nematology, Volume 52 , 1–12

research-article | 30-November-2020

Isolation and characterization of endophytic bacteria from tomato foliage and their in vitro efficacy against root-knot nematodes

). Abundant and diverse populations of bacterial endophytes have been identified in various crops such as potato (Sturz et al., 1999; Garbeva et al., 2001), maize (Fisher et al., 1992; McInroy & Kloepper, 1995), cotton (McInroy & Kloepper, 1995) and cucumber (Mahafee & Kloepper, 1997). Plant parasitic nematodes are the major constraints in crop production and cause an estimated $157 billion loss annually to different agricultural crops (Abad et al., 2008). Among plant parasitic nematodes, root-knot

Binita Basumatary, Debanand Das, B. N. Choudhury, Pranab Dutta, Ashok Bhattacharyya

Journal of Nematology, Volume 53 , 1–16

research-article | 30-November-2019

Nematicidal effect of cruciferous bio-fumigants against the root-knot nematode, Meloidogyne incognita infesting okra

influenced due to the attack by several pathogens, such as bacteria, fungi, viruses, nematodes, and abiotic factors. Plant parasitic nematodes are the most harmful pests of vegetable crops, responsible for an annual yield loss amounting to 9 to 15% of the world crop yield (Koenning et al., 2004). Among all the plant parasitic nematodes, root-knot nematodes (Meloidogyne spp.) are a hidden threat to okra (Marin et al., 2017). It has been reported that root-knot nematode causes annual losses up to 29% in

J.A. Patil, Anil Kumar, Saroj Yadav, K.K. Verma

Journal of Nematology, Volume 52 , 1–7

research-article | 30-November-2020

Report of the Parana coffee root-knot nematode, Meloidogyne paranaensis (Tylenchida: Meloidogynidae) from Caladium sp. in the continental United States

In May 2021, the soil sample taken from a potted elephant ear plant (Caladium sp.) originating from San Antonio, Texas, USA was sent for analysis in the Nematology Laboratory, Plant Pest Diagnostics Center, California Department of Food and Agriculture, Sacramento, California. Several second-stage juveniles (J2) of the root-knot nematodes (RKN) were detected in the extracts from this soil sample. The analysis of these juveniles using several molecular markers revealed that this sample contained

Sergei A. Subbotin, Julie Burbridge

Journal of Nematology, Volume 53 , 1–6

research-article | 30-November-2020

Induction of defence-related proteins by selected plant growth regulators and biocontrol agents against guava root knot nematode, Meloidogyne enterolobii

yellowing followed by bronzing and marginal necrosis of leaves, delayed and poor flowering, shedding of leaves, reduction in fruit size, and decline of guava trees leading to complete destruction of the orchards within a short span of time of one to two years (Ashokkumar and Poornima, 2019). Root-knot nematode infestation at Ayakudi and surrounding villages of Dindigul district which are the major Guava growing area in Tamil Nadu was reported by Poornima et al. (2016) for the first time and the nematode

N. Ashokkumar, K. Poornima, P. Kalaiarasan, P. Jeyakumar, D. Uma, M. Kavino, S. Dharani, S. Kothai

Journal of Nematology, Volume 53 , 1–15

research-article | 17-March-2020

First report of root-knot nematode, Meloidogyne arenaria, on lavender in Turkey

Root-knot nematodes are the most damaging group of plant-parasitic nematodes (Gill and McSorley, 2011). Since they have a wide host range worldwide, root-knot nematodes cause serious economic losses in plants (Jones et al., 2013). In addition, they can cause more serious damage by forming disease complexes with soil pathogens (Siddiqui et al., 2014; Lobna et al., 2016). Medicinal and aromatic plants are widely used in pharmacy and perfumery industries. Lavender (Lavandula spp.) is mainly grown

Tevfik Özalp, Gonca Könül, Önder Ayyıldız, Adnan Tülek, Zübeyir Devran

Journal of Nematology, Volume 52 , 1–3

research-article | 30-November-2020

First report of Seville root-knot nematode, Meloidogyne hispanica (Nematoda: Meloidogynidae) in the USA and North America

, needle, ring, stunt, pin, lance, and stubby root nematodes (Tylka et al., 2011; Yan et al., 2016). The Seville root-knot nematode, Meloidogyne hispanica (Hirschmann, 1986) was studied for the first time by Dalmasso and Bergé (1978) from Seville, Spain from peach rootstock (Prunus persica silvestris Batsch) and later described as M. hispanica by Hirschmann (1986). The species has been reported infecting many economically important crops such as tomato, beet, corn, pepper, cucumber, eggplant, potato

Andrea M. Skantar, Zafar A. Handoo, Sergei A. Subbotin, Mihail R. Kantor, Paulo Vieira, Paula Agudelo, Maria N. Hult, Stephen Rogers

Journal of Nematology, Volume 53 , 1–7

Article | 05-December-2017

Influence of Root Exudates and Soil on Attachment of Pasteuria penetrans to Meloidogyne arenaria

Abstract: The bacterium Pasteuria penetrans is a parasite of root-knot nematodes (Meloidogyne spp.). Endospores of P. penetrans attach to the cuticle of second-stage juveniles (J2) and subsequently sterilize infected females. When encumbered by large numbers of spores, juveniles are less mobile and their ability to infect roots is reduced. This study looked at different factors that influence spore attachment of P. penetrans to the root-knot nematode Meloidogyne arenaria. Pretreatment of J2


Journal of Nematology, Volume 49 , ISSUE 3, 304–310

research-article | 21-October-2020

Chenopodium album is a weed host of Meloidogyne incognita (Nematoda: Meloidogynidae) in Peru

. soybean, wheat, barley, maize, quinoa, potato, sugarbeet, sugarcane, and peanut) (Bajwa et al., 2019). C. album is more problematic than other species of the genus, as the is more widespread and infests more number of crops, and it also acts as an alternate host of several crop pests and pathogens (Bellé et al., 2019). In this context, several weed species have been reported to host root-knot nematodes (Meloidogyne spp. Göldi, 1887). This genus of root-knot nematodes has the largest impact on major

Jorge Airton Gómez-Chatata, Teodocia Gloria Casa-Ruiz, Juan José Tamo-Zegarra, Cristiano Bellé

Journal of Nematology, Volume 52 , 1–4

research-article | 09-April-2020

First report of the root-knot nematode, Meloidogyne morocciensis infecting peach in Southern Brazil

W. R. Silva, C. P. Machaca-Calsin, C. B. Gomes

Journal of Nematology, Volume 52 , 1–3

research-article | 30-November-2020

Host status of morning-glory (Ipomoea spp.) to Meloidogyne species

-parasitic nematodes, among which the root-knot nematodes (Meloidogyne spp. Göldi). This phytoparasite genus has the greatest impact on crops in the world, in addition to being the genus most frequently found in parasitic weed roots (Bellé et al., 2019; Ferraz et al., 1978; Moens and Perry, 2009). In Brazil, an increasing number of studies have been developed that report weeds, present in agricultural areas, as natural hosts of several species of nematodes of the genus Meloidogyne (Bellé et al., 2016

Tiago Edu Kaspary, Ismail Teodoro de Souza Júnior, Rodrigo Ferraz Ramos, Cristiano Bellé

Journal of Nematology, Volume 53 , 1–6

research-article | 30-November-2018

First report of Meloidogyne javanica (Nematoda: Meloidogynidae) infecting Scoparia dulcis, a medicinal plant in Brazil

non-inoculated plants did not exhibit any galls. The morphological and molecular characterization of this re-isolated root-knot nematode were identical those of M. javanica. This is the first report of M. javanica parasitising S. dulcis in Brazil. Globally, M. javanica is considered an economically important agricultural nematode reported over 770 plant species, including tea [(Camellia sinensis (L.) Kuntze], grape (Vitis sp. L.), many vegetables, fruit trees, weeds, cereals, and ornamentals

Cristiano Bellé, Rodrigo Ferraz Ramos, Andressa Lima de Brida, Tiago Edu Kaspary

journal of nematology, Volume 51 , 1–3

research-article | 21-October-2020

First report of southern root-knot nematode, Meloidogyne incognita, infecting Brassica nigra in Peru

Province, Peru. In order to identify the plant-parasitic nematode species, a combination of morphological, biochemical, and molecular analyses were performed. Figure 1: A and B: Roots of Brassica nigra (L.) W.D.J. Koch showing galls induced by Meloidogyne incognita (Kofoid and White, 1919; Chitwood, 1949). This population of root-knot nematode was identified to species with esterase phenotypes (n = 36 females) (Carneiro and Almeida, 2001); morphology, and morphometrics of second-stage juveniles

Jorge Airton Gómez-Chatata, Juan José Tamo-Zegarra, Teodocia Gloria Casa-Ruiz, Cristiano Bellé

Journal of Nematology, Volume 52 , 1–3

research-article | 30-November-2020

Effect of fluensulfone on different functional genes of root-knot nematode Meloidogyne incognita

Over 4,100 species of plant-parasitic nematodes (PPNs) pose a major threat to the present day agriculture accounting an estimated yield loss of US$ 173 billion every year (Decraemer and Hunt, 2006). Amongst the top 10 PPN species that cause majority of the economic damage worldwide, root-knot nematodes (RKNs) of genus Meloidogyne are considered to be the most severe (Elling, 2013; Jones et al., 2013). The second-stage juveniles (J2s) of RKNs enter the plant roots and develop permanent feeding

Alkesh Hada, Divya Singh, Kranti Kavalipurapu Veera Venkata Satyanarayana, Madhurima Chatterjee, Victor Phani, Uma Rao

Journal of Nematology, Volume 53 , 1–14

research-article | 26-April-2019

First report of Meloidogyne javanica on Ginger and Turmeric in the United States

Abolfazl Hajihassani, Weimin Ye, Brooke B. Hampton

Journal of Nematology, Volume 51 , 1–3

research-article | 30-November-2018

First Report of the Root-Knot Nematode, Meloidogyne floridensis Infecting Guardian® Peach Rootstock in South Carolina, USA

The peach root-knot nematode (RKN), Meloidogyne floridensis (Handoo et al., 2004), is an important parasite that can severely impact commercial peach production because of its capability to overcome RKN resistance in peach rootstocks. This nematode species was first described in Florida in 2004 (Handoo et al., 2004) where it is currently found in 12 counties (Brito et al., 2015) and was recently detected in two counties in California (Westphal et al., 2019). In 2018 to 2019, during surveys for

Gregory L. Reighard, William G. Henderson, Sarah O. Scott, Sergei. A. Subbotin

journal of nematology, Volume 51 , 1–6

research-article | 30-November-2020

Potential of nicotinamide adenine dinucleotide (NAD) for management of root-knot nematode in tomato

safe, cheap and the overall preferred method to manage pests and diseases. Root-knot nematodes (RKN), Meloidogyne spp., are among the most damaging pests causing significant economic loss in a range of agricultural crops including tomato. Tomato is considered one of the best hosts of RKN and results in yield losses ranging from 25 to 100% (Seid et al., 2015). Fortunately, tomato is one of the few vegetable commodities where resistance against RKN is commercially available. The resistance is

Homan Regmi, Noor Abdelsamad, Peter DiGennaro, Johan Desaeger

Journal of Nematology, Volume 53 , 1–11

research-article | 30-November-2020

First report of root-knot nematode, Meloidogyne incognita, infecting hops, Humulus lupulus, in São Paulo, Brazil

. 2018; Nascimento et al. 2020). Root-knot (Meloidogyne spp.) are problems in the main cultures of Brazil, causing serious damage and losses in several locations and cultures (Ferraz and Brown, 2016). M. incognita is a serious problem in crops such as maize, sugarcane, coffee, cotton, vegetables, and many others, being responsible for severe losses in Brazil (Ferraz and Brown, 2016). Currently, there are few hop breeding programs in Brazil, one of them is located in Jaboticabal (Tiengo, 2019) where M

R. F. Gonsaga, A. Souza Pollo, D. D. Nascimento, R. J. Ferreira, L. T. Braz, P. L. M. Soares

Journal of Nematology, Volume 53 , 1–4

research-article | 30-November-2020

Degree of resistance of Solanum torvum cultivars to Mi-1.2-virulent and avirulent isolates of Meloidogyne incognita, Meloidogyne javanica, and Meloidogyne luci

Eggplant (Solanum melongena L.) is a member of the Solanaceae family and has wide genetic variation in shape, colour and size (Daunay et al., 2001). In 2019, eggplant was grown in 1.8 M hectares, with a total production of 55 M tons worldwide. Turkey is the world’s fourth largest eggplant producer after China, India, and Egypt, with an annual production of 8.2 M tons (FAO, 2021). Root-knot nematodes (RKNs) are one of the most important pathogens affecting eggplant. The use of plants resistant

Seren Sargın, Zübeyir Devran

Journal of Nematology, Volume 53 , 1–7

research-article | 14-June-2021

First report of Meloidogyne incognita infecting Cannabis sativa in Alabama

Industrial hemp (Cannabis sativa L.) is a new crop for Alabama with the recent legalization and hemp acreage is increasing each year. In the first season of legal production, hemp plants (cultivar ‘Boax’ and ‘Otto2’) in a commercial field located in Geneva County, AL exhibited stunted growth, poor root development, and numerous galls typical of root-knot nematode (Meloidogyne spp.) infection. After harvest in September 2019, 75 L of soil were collected from the field in the area with

Bisho R. Lawaju, William Groover, Jessica Kelton, Kassie Conner, Edward Sikora, Kathy S. Lawrence

Journal of Nematology, Volume 53 , 1–3

research-article | 23-April-2019

Resistant Pepper Carrying N, Me1, and Me3 have Different Effects on Penetration and Reproduction of Four Major Meloidogyne species

Root-knot nematodes, Meloidogyne spp., are one of the most yield-limiting parasites of peppers (Capsicum annuum L.) in the USA and worldwide (Sasser and Freckman, 1987; Thies and Fery, 2000). These parasites are widely distributed across the world and are adapted to develop and reproduce on peppers in tropical and subtropical climates. Infection of peppers by Meloidogyne spp. can cause changes in the plant physiology, fruit morphology and yield. Three species of M. incognita (Kofoid & White

Abolfazl Hajihassani, William B. Rutter, Xuelin Luo

Journal of Nematology, Volume 51 , 1–9

research-article | 30-November-2019

First report of Meloidogyne naasi parasitizing turfgrass in Portugal

The barley root-knot nematode, Meloidogyne naasi Franklin, 1965 was originally described from field crops (cereals, grasses, and sugarbeet, Beta vulgaris L.) in England and Wales (Franklin, 1965). According to the EPPO Global Database, this nematode is present in temperate regions in all continents: Africa (Libya); Asia (Iran); Europe (Belgium, Czech Republic, Denmark, France, Germany, Hungary, Ireland, Italy, Malta, the Netherlands, Norway, Poland, Serbia and UK); North America (Canada, USA

M. Clara Vieira dos Santos, M. Teresa M. Almeida, Sofia R. Costa

Journal of Nematology, Volume 52 , 1–4

research-article | 30-November-2020

Pathogen identification of Gentiana macrophylla root-knot nematode disease in Yulong, China

Qinjiao (Gentiana macrophylla) is a perennial herb of the Gentianaceae family, mainly produced in Mongolia, Russia, and China. Gentiana macrophylla has been widely cultivated in the southwest region of China for medicinal uses (Zhang et al., 2003). Severely stunted and withered Qinjiao plants with rotted and galled roots were observed in a field of the Yulong country (N 99°46′; E 27°18′) in September 2020. These are typical symptoms of infection by root-knot nematodes (RKN; Meloidogyne spp

Wentao Wu, Shanshan Xu, Zewen Gao, Shusheng Zhu, Youyong Zhu, Yang Wang, Xiahong He

Journal of Nematology, Volume 53 , 1–3

research-article | 30-November-2020

First report and new molecular and morphological characterizations of root-knot nematode, Meloidogyne javanica, infecting ginger and long coriander in Vietnam

Root-knot nematodes belonging to the genus Meloidogyne are one of the most damaging plant-parasitic nematodes of the world (Jones et al., 2013). These nematodes parasitize thousands of plant species and cause significant yield loss (Agrios, 2005; CABI, 2020; Jones et al., 2013). Among more than 100 known species, the tropical (Meloidogyne arenaria (Chitwood, 1949; Neal, 1889), Meloidogyne incognita (Chitwood, 1949; Kofoid and White, 1919), and Meloidogyne javanica (Chitwood, 1949; Treub, 1885

Ke Long Phan, Thi Mai Linh LE, Huu Tien Nguyen, Thi Duyen Nguyen, Quang Phap Trinh

Journal of Nematology, Volume 53 , 1–8

research-article | 06-November-2020

Morphological and molecular analyses of a Meloidogyne mali population with high intragenomic rRNA polymorphism

Meloidogyne mali (Itoh et al., 1969) is a root-knot nematode (RKN) causing significant damage by inducing root galls on its host plant and consequently reduced host growth by interfering with the uptake of water and nutrients. M. mali has a wide host range, typically on trees, but can also parasitize on shrubs and herbaceous plants (Ahmed et al., 2013). M. mali was first described in Japan in 1969, with the type host apple (Malus domestica Borkh.) (Itoh et al., 1969). In 2000, a root-knot

Jianfeng Gu, Yiwu Fang, Lele Liu

Journal of Nematology, Volume 52 , 1–11

Research Article | 03-September-2018

Activity of Vetiver Extracts and Essential Oil against Meloidogyne incognita

Vetiver, a nonhost grass for certain nematodes, was studied for the production of compounds active against the southern root-knot nematode, Meloidogyne incognita. In laboratory assays studying the effects on second-stage juvenile (J2) activity and viability, crude vetiver root and shoot extracts were nematotoxic, resulting in 40% to 70% J2 mortality, and were also repellent to J2. Vetiver oil did not exhibit activity against J2 in these assays. Gas chromatography-mass spectrometry analyses of

Kansiree Jindapunnapat, Nathan D. Reetz, Margaret H. MacDonald, Ganga Bhagavathy, Buncha Chinnasri, Noppamas Soonthornchareonnon, Anongnuch Sasnarukkit, Kamlesh R. Chauhan, David J. Chitwood, Susan L.F. Meyer

Journal of Nematology, Volume 50 , ISSUE 2, 147–162

research-article | 17-March-2020

The effects of Meloidogyne incognita and Heterodera glycines on the yield and quality of edamame (Glycine max l.) in Arkansas

(Wrather and Koenning, 2003, 2006). Two nematodes of major concern for soybean production in Arkansas include the soybean cyst nematode (Heterodera glycines, Ichinoe) and the southern root-knot nematode (Meloidogyne incognita, Kofoid & White, Chitwood). Both nematodes have been historically present in Arkansas soybean and cotton fields (Kirkpatrick et al., 1992; Bateman et al., 2000; Walter and Barker, 1994; Tylka and Marett, 2014). A survey from 2018 identified that soybean cyst and root-knot nematode

J. E. Wilkes, T. L. Kirkpatrick

Journal of Nematology, Volume 52 , 1–15

Article | 21-July-2017

Mitochondrial Haplotype-based Identification of Root-knot Nematodes (Meloidogyne spp.) on Cut Foliage Crops in Florida

Florida accounts for more than 75% of the national cut foliage production. Unfortunately, root-knot nematodes (RKN) (Meloidogyne spp.) are a serious problem on these crops, rendering many farms unproductive. Currently, information on the Meloidogyne spp. occurring on most commonly cultivated cut foliage crops in Florida, and tools for their rapid identification are lacking. The objectives of this study were to (i) identify specific RKN infecting common ornamental cut foliage crops in Florida


Journal of Nematology, Volume 48 , ISSUE 3, 193–202

Research Article | 17-October-2018

Discovery and Identification of Meloidogyne Species Using COI DNA Barcoding

. The addition of these DNA sequences to GenBank and the Barcode of Life Database (BOLD) should stimulate and facilitate root-knot nematode identification and provide a first step in new species discovery.

Thomas Powers, Timothy Harris, Rebecca Higgins, Peter Mullin, Kirsten Powers

Journal of Nematology, Volume 50 , ISSUE 3, 399–412

research-article | 30-November-2018

Maternal Stress Reduces the Susceptibility of Root-Knot Nematodes to Pasteuria Penetrans

D. magna genotypes were raised under low-food conditions, their offspring showed varying levels of resistance to parasites. Pasteuria penetrans is an obligate bacterial pathogen of root-knot nematodes, Meloidogyne spp. The infection process of P. penetrans has multiple steps during which the nematode could resist infection. The first step is attachment of endospores to the cuticle of the second-stage juvenile (J2). Individuals within a root-knot nematode population have been shown to vary in

Chang Liu, Pingsheng Ji, Patricia Timper

Journal of Nematology, Volume 51 , 1–8

research-article | 30-November-2021

Additional fertilizer and nematicide combinations on upland cotton to manage Rotylenchulus reniformis and Meloidogyne incognita in Alabama

restricted to tropical and subtropical regions because of elevated temperatures and humidity that are ideal for growth (Luttrell et al., 1994). These climate conditions are found in the cotton belt of the Southern United States where most cotton production occurs (Jones and Durand, 1959). The reniform nematode (Rotylenchulus reniformis Linford and Oliveira) and the southern root-knot nematode (Meloidogyne incognita Kofoid and White) are the most economically important nematodes on upland cotton

Kara L. Gordon, Drew W. Schrimsher, Kathy S. Lawrence

Journal of Nematology, Volume 54 , 1–15

research-article | 30-November-2019

Additional notes on the morphology and molecular data of the Kikuyu root-knot nematode, Meloidogyne kikuyensis (Nematoda: Meloidogynidae)

nodule-like gall were elucidated by light, scanning, and transmission electron microscopy (Eisenback and Dodge, 2012; Dodge, 2014). The galls induced by M. kikuyensis are unique and more complex than those caused by most root-knot nematode species. The vascular tissues that supply the giant cells with nutrients occur at a right angle to the vascular cylinder in the main root. Unlike most species of root-knot nematodes, feeding cells of M. kikuyensis appear to be formed by the dissolution of cell

J. D. Eisenback, P. Vieira

Journal of Nematology, Volume 52 , 1–13

research-article | 24-April-2020

Genetic intraspecific diversity of Meloidogyne javanica parasitizing vegetables in southern Iran

Plant-parasitic nematodes are an important limiting factor in vegetable production, and in many areas a major factor requiring extensive use of pesticides. Root-knot nematodes (RKNs) of the genus Meloidogyne (Göldi, 1887), which their population increase to damaging levels within a few seasons under susceptible crops, are so common in subtropical and tropical vegetable production that frequently they are taken to represent “nematodes” in general (Sikora and Fernandez, 2005). The populations of

Reza Ghaderi, Ali Asghar Dehghan, Abbas Mokaram Hesar, Akbar Karegar

Journal of Nematology, Volume 52 , 1–13

research-article | 17-March-2020

Silver nanoparticles as a potential nematicide against Meloidogyne graminicola

Rice (Oryza sativa) is a major life-sustaining crop in India and feeds more than 60% of the population. During 2014 to 2015, the area under rice crop in India was 43.86 million ha with a total rice production of 105.48 million tons (Anonymous, 2016). Rice root-knot nematode, Meloidogyne graminicola, is widely distributed across diverse agro-climatic conditions in India (Salalia et al., 2017) and it has emerged as the economically most threatening plant-parasitic nematode in rice nurseries

Richa Baronia, Puneet Kumar, S. P. Singh, R. K. Walia

Journal of Nematology, Volume 52 , 1–9

Research Article | 17-October-2018

Nematicidal Weeds, Solanum nigrum and Datura stramonium

We investigated Solanum nigrum (seeds) and Datura stramonium (shoots) against root-knot nematodes in terms of J2 paralysis and egg hatch inhibition (methanol extract), as well as inhibition of nematode development in host roots (soil amending with either S. nigrum seeds’ or D. stramonium shoots’ meal). Datura stramonium was found equally effective at inhibiting motility of Meloidogyne incognita and Meloidogyne javanica (both EC50 = 427 μg mL−1 at 3 day), but inhibition occurred more quickly for

Chrisostomos Oplos, Kodjo Eloh, Urania-Menkissoglu Spiroudi, Caboni Pierluigi, Nikoletta Ntalli

Journal of Nematology, Volume 50 , ISSUE 3, 317–328

research-article | 12-August-2021

Temperature: a driving factor for Meloidogyne floridensis migration toward different hosts

Plant-parasitic nematodes are microorganisms associated with economically important agricultural crops. Their parasitism may cause considerable yield suppressions, 9 to 15% of worldwide production (Nicol et al., 2011), thus representing a major constraint for global food security. Root-knot nematodes (Meloidogyne spp.) have been ranked first among genera of plant-parasitic nematodes that threatens world agriculture (Jones et al., 2013). A new emerging species, Meloidogyne floridensis, has been

Diego A. H. S. Leitão, Elvira M. R. Pedrosa, Donald W. Dickson, Ana Karina S. Oliveira, Mario Monteiro Rolim

Journal of Nematology, Volume 53 , 1–10

research-article | 15-April-2019

Nicotinamide adenine dinucleotide induced resistance against root-knot nematode Meloidogyne hapla is based on increased tomato basal defense

Root-knot nematodes (RKNs; Meloidogyne spp.) are sedentary endoparasitic nematodes that can infect a wide range of plant species worldwide, which results in approximately $70 billion in crop losses annually (Caboni et al., 2012). Meloidogyne spp. is ranked within the top 10 most economically devastating plant-parasitic nematodes, with Meloidogyne incognita, M. arenaria, M. hapla, and M. javanica as the four major crop-damaging species (Jones et al., 2013). In tomato, yield loss due to RKNs

Noor Abdelsamad, H. Regmi, J. Desaeger, P. DiGennaro

Journal of Nematology, Volume 51 , 1–10

research-article | 30-November-2019

Mixtures of fluopyram and abamectin for management of Meloidogyne incognita in tomato

Nematodes are important parasites of crops. The economic losses caused by nematodes worldwide exceed 157 billion US dollars annually (Abad et al., 2008). Root-knot nematodes have a wide host range and are especially harmful to plants in the Cucurbitaceae and Solanaceae (Nicol et al., 2011). Tomato is extensively cultivated worldwide and highly susceptible. When the southern root-knot nematode (RKN) Meloidogyne incognita infects tomato, the second-stage juveniles (J2) penetrate young roots

Qing-Qing Li, Jing-Jing Li, Qi-Tong Yu, Ze-Yu Shang, Chao-Bin Xue

Journal of Nematology, Volume 52 , 1–11

research-article | 21-January-2022

Susceptibility of Flordaguard peach rootstock to a resistant-breaking population of Meloidogyne floridensis and two populations of Meloidogyne arenaria

Florida growers are considering peach (Prunus persica [L.] Batsch) (Sharpe, 1967) as a viable alternative crop because of the availability of several quality low-chill peach cultivars well-adapted to the subtropical climate and the unique advantage of an early-season market (Olmstead et al., 2015). Peach rootstocks with root-knot nematode (RKN) resistance, a necessary component for the productivity and longevity of an orchard, have primarily been developed in rootstock breeding programs. The

Sai Qiu, Mary Ann D. Maquilan, Jose X. Chaparro, Janete A. Brito, Thomas G. Beckman, Donald W. Dickson

Journal of Nematology, Volume 53 , 1–12

Original Research | 18-July-2017

Diversity of Root-knot Nematodes Associated with Tubers of Yam (Dioscorea spp.) Established Using Isozyme Analysis and Mitochondrial DNA-based Identification

Abstract The root-knot nematodes (RKN), Meloidogyne spp., represent an important threat to yam (Dioscorea spp.) production in West Africa. With the aim to establish the diversity of RKN species affecting yam tubers, for control and resistance screening purposes, surveys were conducted in the main yam producing areas of Nigeria. Galled tubers (N = 48) were collected from farmers’ stores and markets in nine states in Nigeria and in one district in Ghana. RKN isolated from yam tubers were

Yao A. Kolombia, Gerrit Karssen, Nicole Viaene, P. Lava Kumar, Nancy de Sutter, Lisa Joos, Danny L. Coyne, Wim Bert

Journal of Nematology, Volume 49 , ISSUE 2, 177–188

research-article | 16-January-2021

Occurrence and molecular characterization of Meloidogyne graminicola on rice in Central Punjab, Pakistan

Rice (Oryza sativa L.) is one of the major cereal crops produced in Pakistan and is cultivated on an area of 2,900,600 hectares with a production of 11,174,700 tons (FAO, 2017). As a staple food, its consumption exceeds 100 kg per capita annually in most of the Asian countries (Seck et al., 2012). Several biotic and abiotic constraints limit the yield and quality of rice. Among biotic constraints, plant-parasitic nematodes are an emerging threat to rice production. Root-knot nematodes (RKNs

Abdul Jabbar, Nazir Javed, Anjum Munir, Huma Abbas, Sajid A. Khan, Anam Moosa, Muhammad Jabran, Byron J. Adams, Muhammad A. Ali

Journal of Nematology, Volume 52 , 1–17

research-article | 30-November-2019

Festulolium and fungal endophyte associations: host status for Meloidogyne incognita and nematotoxic plant extracts

indicated that the loline alkaloid N-formylloline could either attract or repel the plant-parasitic nematode Pratylenchus scribneri, depending on the loline concentration (Bacetty, Snook, Glenn, Noe, Nagabhyru and Bacon, 2009). While endophytes can affect susceptibility of grasses to nematodes, host status may be more strongly influenced by plant cultivar than by presence or absence of endophyte. For example, tall fescue ‘Kentucky 31’, with or without endophytes, was a host for the Southern root-knot

Susan L. F. Meyer, Brian J. Patchett, Timothy J. Gillanders, Mihail R. Kantor, Patricia Timper, Margaret H. MacDonald

Journal of Nematology, Volume 52 , 1–16

research-article | 16-April-2020

Nematicide efficacy at managing Meloidogyne arenaria and non-target effects on free-living nematodes in peanut production

Peanut (Arachis hypogaea) is an important crop in the United States with 757,000 ha planted in 2018, worth $1.15 billion (NASS-USDA, 2019a, b). Much of the production is concentrated in the Southeast where Meloidogyne arenaria (peanut root-knot nematode (PRKN)) can significantly reduce yields with suppression approaching 50% observed in field research (Rodriguez-Kabana and Robertson, 1987; Rodriguez-Kabana et al., 1994a, 1994b). Damage thresholds for this nematode are 1 egg/100 cm3, so any

Zane J. Grabau, Mark D. Mauldin, Alemayehu Habteweld, Ethan T. Carter

Journal of Nematology, Volume 52 , 1–10

Article | 24-July-2017

Grafting and Paladin Pic-21 for Nematode and Weed Management in Vegetable Production

Two years of field trials conducted in a Meloidogyne incognita-infested field evaluated grafting and Paladin Pic-21 (dimethyl disulfide:chloropicrin [DMDS:Pic] 79:21) for root-knot nematode and weed control in tomato and melon. Tomato rootstocks evaluated were; ‘TX301’, ‘Multifort’, and ‘Aloha’. ‘Florida 47’ was the scion and the nongrafted control. A double crop of melon was planted into existing beds following tomato harvest. Melon


Journal of Nematology, Volume 48 , ISSUE 4, 231–240

research-article | 30-November-2019

Yellow and purple nutsedge and coffee senna as hosts of common plant nematodes in Florida

. columbus, Belonolaimus longicaudatus, Dolichodorus heterocephalus, Nanidorus minor, and Ditylenchus destructor (Rhoades, 1964; Bird and Hogger, 1973; Minton et al., 1987; De Waele et al., 1990; Schroeder et al., 1993). Furthermore, nutsedge tuber counts were highly correlated with soil infestation densities of M. incognita (Thomas et al., 1995; Ou et al., 2008). In Florida’s high-value vegetable and strawberry production systems nutsedges are a primary weed problem, and root-knot nematodes (RKN) of

Maria de Lourdes Mendes, Donald W. Dickson, William T. Crow

Journal of Nematology, Volume 52 , 1–9

research-article | 30-November-2020

Meloidogyne incognita management by nematicides in tomato production

The production of tomato (Solanum lycopersicum) is a very important industry in the United States with 10 billion kg tomatoes worth $1.6 billion United States dollars (USD) produced in 2019 (USDA-NASS, 2020). Florida produces 54% of fresh market tomatoes, an industry that produced 646 million kg worth $705 million (USD) nationwide in 2019 (USDA-NASS, 2020). Meloidogyne incognita (southern root-knot nematode, SRKN) is a major pest in tomato production, and there are relatively few management

Zane J. Grabau, Chang Liu, Rebeca Sandoval-Ruiz

Journal of Nematology, Volume 53 , 1–12

research-article | 30-November-2020

Endophytic Beauveria bassiana increases galling of ‘Rutgers’ tomato roots with Meloidogyne incognita

entry wounds for secondary pathogens (Shalini et al., 2014). Of all identified nematodes, only 15% cause significant economic crop losses (Bernard et al., 2017; Koenning et al., 1999). Genera of highest economic importance in the U.S. include Meloidogyne, Heterodera, Pratylenchus, Hoplolaimus, Xiphinema, and Rotylenchulus (Bernard et al., 2017; Koenning et al., 1999). Meloidogyne incognita, the southern root-knot nematode (RKN), is the most devastating threat to agricultural crop production

Shalini Yerukala, Ernest C. Bernard, Kimberly D. Gwinn, David M. Butler, Parwinder S. Grewal, Bonnie H. Ownley

Journal of Nematology, Volume 53 , 1–16

research-article | 30-November-2018

Identification of Suitable Meloidogyne spp. Housekeeping Genes

Root-knot nematodes (RKN, Meloidogyne spp.) are sedentary endoparasites with wide host ranges, including most important agricultural crops, and cause billions of dollars in yield losses (Sasser and Freckman, 1987). The first genomes of M. hapla and M. incognita were available in 2008 (Abad et al., 2008; Opperman et al., 2008), and now the genomes of seven RKN species, including the abovementioned two, and M. arenaria, M. enterolobii, M. floridensis, M. javanica are publicly available. The

Weiming Hu, Peter M. DiGennaro

journal of nematology, Volume 51 , 1–11

Article | 21-July-2017

Assessment of DAPG-producing Pseudomonas fluorescens for Management of Meloidogyne incognita and Fusarium oxysporum on Watermelon

Pseudomonas fluorescens isolates Clinto 1R, Wayne 1R, and Wood 1R, which produce the antibiotic 2,4-diacetylphloroglucinol (DAPG), can suppress soilborne diseases and promote plant growth. Consequently, these beneficial bacterial isolates were tested on watermelon plants for suppression of Meloidogyne incognita (root-knot nematode: RKN) and Fusarium oxysporum f. sp. niveum (Fon). In a greenhouse trial,Wayne 1R root dip suppressed numbers of RKN eggs per gram root on ‘Charleston Gray’ watermelon


Journal of Nematology, Volume 48 , ISSUE 1, 43–53

Article | 21-July-2017

Evaluation of Steam and Soil Solarization for Meloidogyne arenaria Control in Florida Floriculture Crops

Steam and soil solarization were investigated for control of the root-knot nematode Meloidogyne arenaria in 2 yr of field trials on a commercial flower farm in Florida. The objective was to determine if preplant steam treatments in combination with solarization, or solarization alone effectively controlled nematodes compared to methyl bromide (MeBr). Trials were conducted in a field with naturally occurring populations of M. arenaria. Treatments were solarization alone, steam treatment after


Journal of Nematology, Volume 48 , ISSUE 3, 183–192

research-article | 30-November-2021

Review of nematode interactions with hemp (Cannabis sativa)

the terms “Cannabis × nemato*” and “hemp × nemato*”. The abstract of each article was read to determine if its subject matter concerned plant-parasitic nematodes and Cannabis sativa, as many hits dealt with sunn hemp (Crotalaria juncea L.), Bombay hemp or kenaf (Hibiscus cannabinus L.) and other plants. To determine the total number of records for root-knot nematodes, the terms “Meloidogyne”, “Heterodera radicicola” and “Heterodera marioni” were searched. Because Web of Science contains a number

Ernest C. Bernard, Angel G. Chaffin, Kimberly D. Gwinn

Journal of Nematology, Volume 54 , 1–18

research-article | 30-November-2020

Reproduction of Meloidogyne arenaria race 2 on flue-cured tobacco with putative resistance derived from Nicotiana repanda

hectares planted in Virginia alone in 2020 (USDA, 2020). Root-knot nematodes (Meloidogyne spp.) can seriously complicate production for tobacco growers in the southeastern United States, causing crop losses of 1 to 5% in Virginia in affected fields (Fortnum et al., 2001; Koenning et al., 1999). The use of resistant cultivars for root-knot nematode management is a fundamental tool for flue-cured tobacco growers (Johnson et al., 2005), particularly in light of the increasing restrictions on some of the

Noah Adamo, Charles S. Johnson, T. David Reed, Jonathan D. Eisenback

Journal of Nematology, Volume 53 , 1–9

research-article | 06-November-2020

The potential of eugenol as a nematicidal agent against Meloidogyne javanica (Treub) Chitwood

Root-knot nematodes (RKN; Meloidogyne spp.) cause economic damage to a wide range of economically important open field and greenhouse vegetable crops and are considered one of the most damaging agricultural pests worldwide. The genus Meloidogyne has an extremely broad host range of over 2000 plant species, which can cause significant yield losses (Chitwood, 2003; Bleve-Zacheo et al., 2007). The control of nematodes has become increasingly difficult due to many reasons. Many nematicides and soil

Eleni Nasiou, Ioannis O. Giannakou

Journal of Nematology, Volume 52 , 1–10

research-article | 17-September-2019

First Report of Meloidogyne ethiopica and M. javanica in Rumex spp. in Rio Grande do Sul State, Brazil

Rumex spp. is a common weed in the southern of the Brazil, where it infests pastures, annuals crop and orchards. In September 2017, Rumex plants with root-knot disease were collected in the municipality of Pelotas, state of Rio Grande do Sul, Brazil. Initially, specimens were obtained by Coolen and D’Herde (1972) and later identified through morphological studies and esterase phenotypes (Carneiro and Almeida, 2001). Perineal patterns were consistent with Meloidogyne ethiopica (Whitehead, 1968

L. A. Yánez Márquez, M. Divers, W. R. Silva, J. V. de Araújo Filho, C. B. Gomes

journal of nematology, Volume 51 , 1–2

research-article | 30-November-2020

Transcriptome Analyses of Pre-parasitic and Parasitic Meloidogyne Chitwoodi Race 1 to Identify Putative Effector Genes

Root-knot nematodes are microscopic, endoparasitic roundworms that are a major limiting factor in the production of potatoes, which are the fourth most important food crop in the world (Birch et al., 2012; Lima et al., 2018). Meloidogyne chitwoodi (Golden et al., 1980) (Tylenchida: Meloidogynidae) is a root-knot nematode with limited worldwide distribution, and in the United States, M. chitwoodi is widely spread in the three states (Washington, Oregon, and Idaho) that produce over half of US

Lei Zhang, Cynthia Gleason

Journal of Nematology, Volume 53 , 1–13

research-article | 26-April-2019

Control of Meloidogyne incognita in sweetpotato with fluensulfone

: aPlot size: 6.1 m long section of 152-cm wide beds. Two lines of sweetpotato planted per bed. Table 2 Average yield (n = 5 ± standard error) of harvested sweetpotato after four treatments assigned to three categories, market (marketable size and quality), cull RKN (culled because of root-knot nematode damage), and cull other (culled because of non-nematode causes). Field trials were conducted during 2016 (cultivar O’Henry) and 2017 (cultivar Beauregard) at SCREC, Irvine, CA1

Antoon Ploeg, Scott Stoddard, J. Ole Becker

Journal of Nematology, Volume 51 , 1–8

Article | 21-July-2017

Reproduction of Meloidogyne incognita Race 3 on Flue-cured Tobacco Homozygous for Rk1 and/or Rk2 Resistance Genes

Most commercial tobacco cultivars possess the Rk1 resistance gene to races 1 and 3 of Meloidogyne incognita and race 1 of Meloidogyne arenaria, which has caused a shift in population prevalence in Virginia tobacco fields toward other species and races. A number of cultivars now also possess the Rk2 gene for root-knot resistance. Experiments were conducted in 2013 to 2014 to examine whether possessing both Rk1 and Rk2 increases resistance to a variant of M. incognita race 3 compared to


Journal of Nematology, Volume 48 , ISSUE 2, 79–86

Research Article | 26-September-2018

Oat, Wheat, and Sorghum Genotype Reactions to Meloidogyne incognita and Meloidogyne javanica


Journal of Nematology, Volume 49 , ISSUE 4, 386–389

Article | 21-July-2017

Efficacy of Various Application Methods of Fluensulfone for Managing Root-knot Nematodes in Vegetables


Journal of Nematology, Volume 48 , ISSUE 2, 65–71

research-article | 30-November-2020

First report of root-knot nematode, Meloidogyne incognita on calendula in Turkey

Plant parasitic nematodes, especially root-knot nematodes (Meloidogyne spp.), cause serious yield losses in vegetables, ornamental and medicinal plants, and horticultural crops around the world (Devran et al., 2017; Karssen et al., 2013; Pintea et al., 2003). The plantation areas of ornamental and medicinal plants in tropical and sub-tropical countries have significantly increased recently in order to be used in pharmaceutical, perfumery, cosmetic and food industries (Pandey, 2017). Calendula

Hürkan Ataş, Gülsüm Uysal, Çiğdem Gözel, Tevfik Özalp, Uğur Gözel, Zübeyir Devran

Journal of Nematology, Volume 53 , 1–5

research-article | 30-November-2020

Evaluation of a new chemical nematicide, fluazaindolizine (ReklemelTM active), for plant-parasitic nematode management in bermudagrass

Will L. Groover, Kathy S. Lawrence

Journal of Nematology, Volume 53 , 1–14

research-article | 30-November-2018

New Hosts and Records in Portugal for the Root-Knot Nematode Meloidogyne luci

Several species of the genus Meloidogyne (root-knot nematodes, RKN) have been reported in Portugal: M. arenaria (Neal, 1889) Chitwood, 1949; M. chitwoodi Golden et al., 1980; M. hapla Chitwood, 1949; M. hispanica Hirschmann, 1986; M. incognita (Kofoid and White, 1919) Chitwood, 1949; M. javanica (Treub, 1885) Chitwood, 1949; and M. lusitanica Abrantes and Santos, 1991 (Abrantes et al., 2008; Conceição et al., 2009). In 2013, the tropical RKN, M. luci Carneiro et al., 2014, was detected in a

Duarte Santos, António Correia, Isabel Abrantes, Carla Maleita

Journal of Nematology, Volume 51 , 1–4

Article | 21-July-2017

Evaluation of Pochonia chlamydosporia and Purpureocillium lilacinum for Suppression of Meloidogyne enterolobii on Tomato and Banana

Meloidogyne enterolobii is one of the most important root-knot nematode in tropical regions, due to its ability to overcome resistance mechanisms of a number of host plants. The lack of new and safe active ingredients against this nematode has restricted control alternatives for growers. Egg-parasitic fungi have been considered as potential candidates for the development of bionematicides. In tissue culture plates, Pochonia chlamydosporia (var. catenulata and chlamydosporia) and


Journal of Nematology, Volume 49 , ISSUE 1, 77–85

Research Article | 31-May-2018

Influence of Temperature on Susceptibility of CVS. Tifguard and Georgia-06G Peanut to Meloidogyne arenaria

Weimin Yuan, C. C. Holbrook, Y. Chu, P. Ozias-Akins, D. W. Dickson

Journal of Nematology, Volume 50 , ISSUE 1, 33–40

research-article | 09-April-2020

Examine medicinal plants from South Africa for suppression of Meloidogyne incognita under glasshouse conditions

nematodes, especially root-knot nematodes (Meloidogyne spp.), are worldwide an extremely important limiting factor in vegetable production (Hallmann and Meressa, 2018). Tomato (Solanum lycopersicon L.) is one of the most common vegetables grown in SA (FAO, 2017). Tomato can be infected by a wide variety of plant-parasitic nematodes but predominantly by root-knot nematodes which can cause significant yield losses (Jones et al., 2017). A nematode survey in rural and peri-urban households, community and

Mbokota Candy Khosa, Zakheleni Dube, Dirk De Waele, Mieke Stefanie Daneel

Journal of Nematology, Volume 52 , 1–7

research-article | 30-November-2019

The relationship between commercial cotton cultivars with varying Meloidogyne incognita resistance genes and yield

The southern root-knot nematode, Meloidogyne incognita (Kofoid and White) Chitwood, is widely distributed across the southern USA. In the Southern High Plains of Texas, M. incognita infested 40 to 50% of the cotton fields (Starr et al., 1993; Wheeler et al., 2000). In the absence of nematode management tactics, it is estimated that M. incognita reduces yield in the west Texas area by an average of 26% (Orr and Robinson, 1984). Management options for this nematode include crop rotation

Terry A. Wheeler, Kerry Siders, Cecilia Monclova-Santana, Jane K. Dever

Journal of Nematology, Volume 52 , 1–8

research-article | 30-November-2019

Further observations on Meloidogyne enterolobii (Nematoda: Meloidogynidae) infecting guava (Psidium guajava) in India

Root-knot nematodes (RKNs, Meloidogyne spp.) are global pests comprised of more than 100 nominal species, and attack a large number of host-plants. Meloidogyne enterolobii Yang and Eisenback, 1983 is an aggressive RKN species with high reproduction potential that infects a wide range of hosts (Brito et al., 2004). Originally, Yang and Eisenback (1983) described M. enterolobii infecting Pacara earpod trees (Enterolobium contortisiliquum (Vell.) Morong) from Hainan Island of China. Subsequently

Tushar Manohar Ghule, Victor Phani, Vishal Singh Somvanshi, Maya Patil, Somnath Bhattacharyya, Matiyar Rahaman Khan

Journal of Nematology, Volume 52 , 1–9

Research Article | 17-October-2018

Characterization of Meloidogyne indica (Nematoda: Meloidogynidae) Parasitizing Neem in India, with a Molecular Phylogeny of the Species

Neem is a perennial plant of family Meliaceae grown very commonly in India. During a survey in Rajasthan, India; a population of root-knot nematode was found in association with tender neem plants causing yellowing, stunting, and heavy root galling. Inspection of the perineal pattern morphology of the adult females, extracted from the galled roots, primarily led to identification of the species as Meloidogyne indica. Further, detailed morphological and morphometric illustrations of second-stage

Victor Phani, Satyapal Bishnoi, Amita Sharma, Keith G. Davies, Uma Rao

Journal of Nematology, Volume 50 , ISSUE 3, 387–398

research-article | 26-October-2020

Xanthosoma sagittifolium is resistant to Meloidogyne spp. and controls Meloidogyne enterolobii by soil biofumigation

Plant-parasitic nematodes cause significant damage in tropical and subtropical agriculture. Among them, the Meloidogyne species, also known as root-knot nematode, affect agricultural production (Jones et al., 2011). The biggest problem in areas infested with these nematodes is the difficulty of managing and controlling them. Many nematicidal products have been withdrawn from the market due to their high toxicity to human beings and the environment (Sousa et al., 2015). Consequently, there is an

Vanessa Alves Gomes, Fabíola de Jesus Silva, Eunice Maria Baquião, Luana Viana Faria, Júlio César Antunes Ferreira, Marcio Pozzobon Pedroso, Fernando Broetto, Silvia Renata Siciliano Wilcken

Journal of Nematology, Volume 52 , 1–12

research-article | 30-November-2020

Transfer of Meloidogyne incognita Resistance Using Marker-assisted Selection in Sorghum

United States in 2018, sorghum was planted on approximately 6 million acres, largely in the Great Plains (USDA-NASS 2019), and it is often grown as a rotation crop with cotton (Gossypium hirsutum), corn (Zea mays), or soybeans (Glycine max) (Xavier-Mis et al., 2017). Because of its drought tolerance and relatively low input requirements, sorghum could be more widely used as a cost-effective rotation crop in the southeastern US. Meloidogyne incognita is the most commonly occurring species of root-knot

Richard F. Davis, Karen R. Harris-Shultz, Joseph E. Knoll, Hongliang Wang

Journal of Nematology, Volume 53 , 1–10

Research Article | 03-December-2018

First Report of the Root-Knot Nematode (Meloidogyne javanica) Infecting Hops (Humulus lupulus) in Florida, USA

J. A. Brito, S. A. Subbotin, J. Desaeger, F. Achinelly, S. Qiu

Journal of Nematology, Volume 50 , ISSUE 4, 543–544

research-article | 30-November-2018

Meloidogyne aegracyperi n. sp. (Nematoda: Meloidogynidae), a root-knot nematode parasitizing yellow and purple nutsedge in New Mexico

University revealed several unusual morphological characters and a unique host range that indicated it was a new species. The perineal pattern, shape of the female stylet, and shape of the male head and stylet were unique and different from those of any other described species. Meloidogyne aegracyperi n. sp. is described herein, and the common name ‘nutsedge root-knot nematode’ is proposed. The specific epithet was derived from the Latin word ‘aegra’ and the host plant name, meaning ‘diseased Cyperus

J. D. Eisenback, L. A. Holland, J. Schroeder, S. H. Thomas, J. M. Beacham, S. F. Hanson, V. S. Paes-Takahashi, P. Vieira

journal of nematology, Volume 51 , 1–16

research-article | 30-November-2019

First report of Meloidogyne javanica infecting Zinnia elegans in Ceará State, Brazil

in productivity (Moens et al., 2009). In October 2019, samples of roots of Zinnia elegans with galls caused by root-knot nematode were sampled in vegetable gardens in the city of Pacoti (4° 13′ 45″S; 38° 55′ 26″ W), in the state of Ceará, Brazil. Nematodes in the roots were processed for extraction using the protocol given by Coolen and D’Herde (1972). For the morphological characterization of the species, 20 females and juveniles of second stage were measured and perineal pattern from 20 females

Francisco Jorge Carlos Souza Junior, Mayara Castro Assunção

Journal of Nematology, Volume 52 , 1–4

Article | 21-July-2017

Acetic Acid, 2-Undecanone, and (E)-2-Decenal Ultrastructural Malformations on Meloidogyne incognita


Journal of Nematology, Volume 48 , ISSUE 4, 248–260

Article | 05-December-2017

The Mesostigmatid Mite Protogamasellus mica, an Effective Predator of Free-Living and Plant-Parasitic Nematodes

Protogamasellus mica was extracted from a sugarcane field in Australia and cultured on bacterial-feeding nematodes. Studies with various nematodes in laboratory arenas showed that one mite and its progeny reduced nematode numbers by between 26 and 50 nematodes/day. A bacterivore (Mesorhabditis sp.), a fungivore (Aphelenchus avenae), and two plant parasites (root-knot nematode, Meloidogyne javanica and root-lesion nematode, Pratylenchus zeae) were all reduced at much the same rate despite the


Journal of Nematology, Volume 49 , ISSUE 3, 327–333

Research Article | 03-September-2018

Revisiting the Life-Cycle of Pasteuria penetrans Infecting Meloidogyne incognita under Soil-Less Medium, and Effect of Streptomycin Sulfate on its Development

Pasteuria penetrans is a Gram-positive, endospore forming soil bacterium, infecting root-knot nematodes, Meloidogyne spp. Being obligate in nature, the bacterium is not easily grown in vitro, and the in vivo culturing technique is relied on the soil-based microcosm since long. Hence, culturing of P. penetrans using CYG germination pouches as a soil-less medium for plant growth, promises to provide a contamination free environment along with ease in isolation of infected females from the plant

Victor Phani, Uma Rao

Journal of Nematology, Volume 50 , ISSUE 2, 91–98

Research Article | 03-December-2018

A novel in vitro chemotaxis bioassay to assess the response of Meloidogyne incognita towards various test compounds

Plant-parasitic, root-knot nematodes (Meloidogyne spp.) are a serious problem in agri- and horticultural crops worldwide. Understanding their complex host recognition process is essential for devising efficient and environmental-friendly management tactics. In this study, the authors report a new, simple, inexpensive, efficient, and quantitative method to analyze the chemotaxis of M. incognita second-stage juveniles (J2s) using a combination of pluronic gel and agar in a petri dish. The authors

Tagginahalli N. Shivakumara, Tushar K. Dutta, Uma Rao

Journal of Nematology, Volume 50 , ISSUE 4, 487–494

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