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  • Journal Of Nematology

 

research-article | 30-November-2018

Conspecific pheromone extracts enhance entomopathogenic infectivity

, two aspects of EPN biology that contribute significantly to biocontrol efficacy include nematode dispersal and infectivity. Prior research indicates that certain substances within EPN-infected hosts enhance nematode dispersal (Shapiro and Glazer, 1996). Furthermore, EPN-infected host substances enhance nematode infectivity, i.e. the propensity to invade the host (Shapiro and Lewis, 1999). Dispersal-inducing compounds in steinernematid nematodes were later described as specific ascaroside

David I. Shapiro-Ilan, Fatma Kaplan, Camila Oliveira-Hofman, Paul Schliekelman, Hans T. Alborn, Edwin E. Lewis

Journal of Nematology, Volume 51 , 1–5

Research Article | 17-October-2018

Survival and Infectivity of Entomopathogenic Nematodes Formulated in Sodium Alginate Beads

An alternative control method to the use of chemical insecticides against soil dwelling insect pests is the application of entomopathogenic nematodes formulated in alginate beads for enhanced shelf life. The aim was to compare the benefit on nematode survival and infectivity of: (i) pre-conditioning of juveniles, and (ii) coating of alginate beads. The nematodes Steinernema glaseri, Steinernema carpocapsae, and Heterorhabditis bacteriophora were reproduced in last instar larvae of the wax moth

Jaime Ruiz-Vega, Carlos I. Cortés-Martínez, Cipriano García-Gutiérrez

Journal of Nematology, Volume 50 , ISSUE 3, 273–280

research-article | 30-November-2020

Infected host responses across entomopathogenic nematode phylogeny

infectivity of infective-stage juvenile EPNs (Hartley et al., 2019; Oliveira-Hofman et al., 2019; Shapiro-Ilan et al., 2019). EPNs are obligate insect endoparasites that rely on a symbiotic bacterial association (Xenorhabdus spp. for Steinernema spp., Photorhabdus spp. for Heterorhabditis spp.). Infective-stage juvenile nematodes (IJs) penetrate their insect host and release cells of their symbiotic bacteria. It is the proliferation of bacteria that in combination with nematode-released toxins kill the

Hilal Erdogan, Glen Stevens, Asa Stevens, David Shapiro-Ilan, Fatma Kaplan, Hans Alborn, Edwin Lewis

Journal of Nematology, Volume 53 , 1–9

research-article | 30-November-2020

The impact of chemical nematicides on entomopathogenic nematode survival and infectivity

EPN species like H. bacteriophora and S. carpocapsae (Browning et al., 2004; Glazer et al., 1997; Hara and Kaya, 1982; Rovesti et al., 1988, Rovesti and Deseo, 1990). These studies mostly aimed to assess the compatibility of these compounds with EPNs based on the survival and infectivity of IJs. There, however, is a need to expand on the diversity of nematicides that are tested for impact on EPN, and their effects on the penetration efficacy and reproductive capacity; chemotaxis and longer-term

Mustapha Touray, Harun Cimen, Sebnem H. Gulsen, Derya Ulug, Dolunay Erdogus, David Shapiro-Ilan, Selcuk Hazir

Journal of Nematology, Volume 53 , 1–17

research-article | 30-November-2020

Meloidogyne enterolobii egg extraction in NaOCl versus infectivity of inoculum on cucumber

Barker, 1973). However, it was also suggested that 0.53% NaOCl caused a hatching delay and therefore, a lower infectivity (19.8%) when compared with intact egg masses (51.4%) (Vrain, 1977). Similarly, egg viability from dissolved egg masses in 1.0% NaOCl has been described as significantly lower (12%) when compared with viability from egg masses in water (58%) (Di Vito et al., 1986). Afterward, a comparison between stirring and grinding of 1.5 g of tomato and soybean roots (2.5-cm pieces) in NaOCl

Guillermo Gómez-González, Isabel Cruz-Lachica, Isidro Márquez-Zequera, José Benigno Valdez-Torres, Juan Manuel Tovar-Pedraza, Luis Alfredo Osuna-García, Raymundo Saúl García-Estrada

Journal of Nematology, Volume 53 , 1–8

original-paper | 28-June-2019

Campylobacter fetus is Internalized by Bovine Endometrial Epithelial Cells

LIZETH GUADALUPE CAMPOS-MÚZQUIZ, ESTELA TERESITA MÉNDEZ-OLVERA, BEATRIZ ARELLANO-REYNOSO, DANIEL MARTÍNEZ-GÓMEZ

Polish Journal of Microbiology, Volume 68 , ISSUE 2, 217–224

research-article | 30-November-2020

Ecological Characterisation of Native Isolates of Heterorhabditis indica from Viti Levu, Fiji Islands

Pacific Islands Pest List Database (https://www.spc.int/pld/). Many of these economically important agricultural insect pests listed in database have been targeted in other countries using EPNs with satisfactory results. In this study, the native isolates were characterised by determining their host finding ability, the effect of temperature on their infectivity and reproduction, the effect of soil moisture on their infectivity, heat tolerance, desiccation tolerance, hypoxia tolerance, and effect of

Sumeet Kour, Uma Khurma, Gilianne Brodie

Journal of Nematology, Volume 53 , 1–20

mini-review | 27-December-2020

Hepatitis B Virus: From Diagnosis to Treatment

quantification. HBV DNA quantification. HBV DNA by NAT is used to determine the infectivity of individuals and infectivity of HBsAg positive pregnant women to prevent mother to child transmission risk and reach a decision whether to treat diseases. The HBV DNA measurement with molecular technologies enables early detection of people at risk before HBsAg emerges and rules out OBI (Aghasadeghi et al. 2020). The testing of HBV DNA is also used to monitor the treatment response in CHB patients (WHO 2017b). The

MERYEM GUVENIR, AYSE ARIKAN

Polish Journal of Microbiology, Volume 69 , ISSUE 4, 391–399

research-article | 26-October-2020

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

their root weight. Some plant VOCs have the potential to interfere with infectivity and reproduction of root-knot nematode, reducing theirs galls and eggs (Kihika et al., 2017; Jardim et al., 2018; Gomes et al., 2020; Silva et al., 2020a; Silva et al., 2020b) and in this work, the same effect is observed. Brassicas can be used in biofumigation as a feasible practice to reduce plant-parasite nematodes in crop fields (Ploeg, 2008; Lord et al., 2011; Chetia et al., 2019). However, further studies are

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 | 03-December-2018

Biological characterization of the entomopathogenic nematode, Steinernema innovationi: a South African isolate

Entomopathogenic nematode species perform differently under different environmental conditions; therefore, the authors investigated the biological and environmental characteristics that could optimize performance of Steinernema innovationi. The authors studied the effect of temperature on infectivity and reproduction, the foraging behavior and host range. Thermal activity was optimal between 22 and 25°C. Highest infective juvenile (IJ) yields in last instar Galleria mellonella were observed at

Tshimangadzo Ramakuwela, Justin Hatting, Mark D. Laing, Nicolene Thiebaut, Selcuk Hazir

Journal of Nematology, Volume 50 , ISSUE 4, 1–10

research-article | 30-November-2019

Evaluation of fluopyram for the control of Ditylenchus dipsaci in sugar beet

. dipsaci development. Consequently, nematode populations were low and did not lead to any damage symptoms. Therefore, we did not use the data for the year 2017. Statistical analysis Data for nematode motility, infectivity (D. dipsaci/seedling), reproduction under glasshouse conditions (D. dipsaci/plant 50 dpi), soil populations (Pf/(Pi + 1)), reproduction in the field (D. dipsaci/100 g beet crown tissue), and root rot symptoms were tested for normality (Shapiro-Wilk normality test) and homogeneity of

Alan Storelli, Andreas Keiser, Reinhard Eder, Samuel Jenni, Sebastian Kiewnick

Journal of Nematology, Volume 52 , 1–10

research-article | 30-November-2020

Performance of entomopathogenic nematodes on the mealybug, Dysmicoccus brevipes (Hemiptera: Pseudococcidae) and the compatibility of control agents with nematodes

concentration indicated by the manufacturer with 1,000 IJs/mL. A control treatment was carried out using only the suspension of EPNs in distilled water at a concentration of 1,000 IJs/mL. Each treatment was repeated five times and the experiment was conducted in a completely randomized design. The tubes were kept in a climatic chamber at 22 ± 1°C and 14 hr of photophase, for 48 hr, when the viability and infectivity were evaluated. The viability assessment was carried out after 48 hr. After shaking the

Marcelo Zart, Mariana Ferracim de Macedo, Jael Simões Santos Rando, Gabriela Souza Doneze, Cassia Pereira Brito, Rodrigo de Souza Poletto, Viviane Sandra Alves

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

one week to recover before nematode inoculations. Nematode viability To test the negative effect of NAD on nematode mortality and infectivity, 400 J2 of M. hapla were incubated in six-well plates, each well contained 2 ml of 5 mM NAD solution or water as control under dark conditions at room temperature for 2 d. Live and dead nematodes were counted under a dissecting microscope and the percentage of dead nematodes was counted. Each treatment included six technical replicates, and the experiment

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

Journal of Nematology, Volume 51 , 1–10

research-article | 30-November-2020

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

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

Journal of Nematology, Volume 53 , 1–14

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