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  • Journal Of Nematology


Research Article | 26-September-2018

First Report of Matricidal Hatching in Bursaphelenchus xylophilus

The reproductive strategy of the pinewood nematode (PWN), Bursaphelenchus xylophilus, is sexual amphimictic and oviparous. The incidence of intrauterine egg development and hatching in plant-parasitic nematodes is not a very common phenomenon. During the process of maintaining and breeding a B. xylophilus population isolated in Spain under laboratory conditions, evidence of matricidal hatching was observed. This is the first described case of this phenomenon in this species.


Journal of Nematology, Volume 49 , ISSUE 4, 390–395

research-article | 30-November-2019

Molecular identification of Bursaphelenchus cocophilus associated to oil palm (Elaeis guineensis) crops in Tibu (North Santander, Colombia)

. These diseases are considered as the main threat and have been responsible for crop losses, including the so-called lethal ones such as sudden wilt (Phytomonas sp.), lethal wilt (unknown etiology), and the red ring disease associated with the migratory endoparasite nematode Bursaphelenchus cocophilus (Cobb, 1919; Goodey, 1960; Baujard, 1989) (=Rhadinaphelenchus cocophilus [Cobb]) (Martínez, 2010). The red ring disease has been reported in Central America (Guatemala, Nicaragua, Belize, Costa Rica, El

Greicy Andrea Sarria, Donald Riascos-Ortiz, Hector Camilo Medina, Yuri Mestizo, Gerardo Lizarazo, Francia Varón De Agudelo

Journal of Nematology, Volume 52 , 1–12

Research Article | 17-October-2018

High Mitochondrial Genome Diversity and Intricate Population Structure of Bursaphelenchus xylophilus in Kyushu, Japan

Mitogenomic diversity and genetic population structure of the pinewood nematode (PWN) Bursaphelenchus xylophilus inhabiting Kyushu, Japan were analyzed. A method for performing long PCR using single nematodes and sequencing nematode mitochondrial genomes individually is presented here. About 8 kb (∼55%) of the complete mitochondrial genome was successfully obtained from 285 individuals collected from 12 populations. The 158 single nucleotide polymorphisms detected corresponded to 30 haplotypes

Hanyong Zhang, Erika Okii, Eiji Gotoh, Susumu Shiraishi

Journal of Nematology, Volume 50 , ISSUE 3, 281–302

Research Article | 03-December-2018

Characterization of Juvenile Stages of Bursaphelenchus crenati Rühm, 1956 (Nematoda: Aphelenchoidoidea)

In this study juvenile stages of Bursaphelenchus crenati (Sexdentati group) were distinguished based mainly on the genital primordium structure. Dauer stage juveniles were sampled under elytra of Hylesinus crenatus in galleries in bark of the wilted Fraxinus excelsior in the Voronezh region of Russia and were multiplied in laboratory cultures on the fungus Botrytis cinerea. Individual development included five stages (J1-J4 and adults) separated by molts. The first molt J1 to J2 occurred inside

Alexander Y. Ryss, Kristina S. Polyanina

Journal of Nematology, Volume 50 , ISSUE 4, 459–472

Article | 05-December-2017

Nematicidal Effects of 5-Aminolevulinic Acid on Plant-Parasitic Nematodes

incognita, Heterodera glycines, Pratylenchus coffeae, and Bursaphelenchus xylophilus. A series of in vitro assays and one greenhouse trial were conducted to examine the nematicidal effects of ALA. The results demonstrated that ALA exhibited a strong effect of suppression against the four nematodes tested. ALA also inhibited hatching of M. incognita and H. glycines. Results from the greenhouse experiment indicated that treatment of soil with 6.0 mM ALA significantly reduced the root-gall index (RGI) and


Journal of Nematology, Volume 49 , ISSUE 3, 295–303

research-article | 18-March-2020

Transcriptomic analysis of Bursaphelenchus xylophilus treated by a potential phytonematicide, punicalagin

Pine wood nematode (PWN), Bursaphelenchus xylophilus, is a plant-feeding nematode parasitizing dozens of pine species and is the cause of pine wilt disease. The disease is highly destructive to pine trees and can spread very quickly from infected trees to reach epidemic proportions (Mamiya, 1983; Mota et al., 1999). Pine wilt disease is primarily controlled using various synthetic nematicides, although their use has increasingly brought concerns on environmental pollution, toxicity to non

Qun-Qun Guo, Gui-Cai Du, Ting-Ting Zhang, Mei-Juan Wang, Chao Wang, Hong-Tao Qi, Rong-Gui Li

Journal of Nematology, Volume 52 , 1–14

research-article | 30-November-2019

A proposal of Bursaphelenchus uncispicularis Zhuo, Li, Li, Yu & Liao, 2007 as a junior synonyms of B. yongensis Gu, Braasch, Burgermeister, Brandstetter & Zhang, 2006

Bursaphelenchus yongensis Gu, Braasch, Burgermeister, Brandstetter & Zhang, 2006 (Gu et al., 2006) was originally described from Pinus massoniana Lamb. in Ningbo city, Zhejiang province, China. It is characterized by a relatively slim body (a = 42 and 57 for females and males, respectively), excretory pore located at level of median bulb, lateral field with three lines, small vulval flap present, long post-uterine branch extending 2/3 to 3/4 of the vulva to anus distance and a conoid female

Jianfeng Gu, Kan Zhuo, Jinling Liao

Journal of Nematology, Volume 52 , 1–3

Article | 21-July-2017

Esteya vermicola Controls the Pinewood Nematode, Bursaphelenchus xylophilus, in Pine Seedlings

Esteya vermicola (Ophiostomataceae) is an endoparasitic fungus that has great potential as a biological control agent against the pinewood nematode Bursaphelenchus xylophilus which causes pine wilt disease.We tested E. vermicola for control of pine wilt disease by spraying E. vermicola conidia on artificial wounds on pine seedlings, and the optimum E. vermicola treatment density and application time were also investigated in the greenhouse. The wounds were similar to those made by


Journal of Nematology, Volume 49 , ISSUE 1, 86–91

research-article | 30-March-2020

First report of Bursaphelenchus fungivorus (Nematoda: Aphelenchida) in Italy and an overview of nematodes associated with Crocus sativus L.

subterranean organ, the corm can come into contact with different organisms such as fungi, bacteria, viruses and nematodes. Most information concerning nematodes associated with saffron, refers to nematodes collected in the soil around the roots of Crocus sativus (Fotedar and Handoo, 1977; Mahdikhani and Alvani, 2013; Sheikh et al., 2014; Cirujeda et al., 2016; Alvani et al., 2017; Hassan and Ahangar, 2018). In this study, Bursaphelenchus fungivorus (Franklin and Hooper, 1962) is reported for the first

Giulia Torrini, Agostino Strangi, Stefania Simoncini, Maria Luppino, Pio Federico Roversi, Leonardo Marianelli

Journal of Nematology, Volume 52 , 1–11

Research Article | 03-December-2018

First report of Bursaphelenchus antoniae from Pinus strobus in the U.S.

Juvenile, female and male nematodes were discovered in wood chips of white pine Pinus strobus from Ashley Falls, MA. Initial observations suggested these nematodes might be PWN, but closer morphological and molecular characterization proved otherwise. Comparison of measured features with those in the literature indicated this nematode population had some unique characteristics. The specimens were identified as Bursaphelenchus antoniae Penas et al., 2006 based on 18S rDNA molecular sequence vs

Lynn K. Carta, R. L. Wick

Journal of Nematology, Volume 50 , ISSUE 4, 473–478

Research Article | 03-December-2018

Nematotoxic coumarins from Angelica pubescens Maxim. f. biserrata Shan et Yuan roots and their physiological effects on Bursaphelenchus xylophilus

The ethanol extracts from the roots of Angelica pubescens Maxim. f. biserrata Shan et Yuan was toxic against the pine wood nematode Bursaphelenchus xylophilus. The ethyl acetate-soluble fraction derived from this extract increased its potency with a mortality of 95.25% in 72 hr at 1.0 mg/mL. Four nematotoxic coumarins were obtained from the ethyl acetate extract by bioassay-guided isolation. These were identified as osthole 1, columbianadin 2, bergapten 3 and xanthotoxin 4 by mass and nuclear

Qun-Qun Guo, Gui-Cai Du, Yong-Xing Li, Chen-Yan Liang, Chao Wang, Ya-Nan Zhang, Rong-Gui Li

Journal of Nematology, Volume 50 , ISSUE 4, 559–568

research-article | 30-November-2018

First record of Aphelenchoides stammeri (Nematoda: Aphelenchoididae) from Turkey

Pine wilt disease, caused by the pinewood nematode, Bursaphelenchus xylophilus (Steiner and Buhrer, 1934; Nickle, 1970) (Nematoda: Parasitaphelenchidae), has been leading to extensive damage in pine forests of eastern Asia (Webster, 1999). After detection of the nematode in Portugal (Mota et al., 1999), the scientific interest in this wood-inhabiting group of nematodes and other components of the pine wilt disease (host tree and vector insects) has increased in European countries. Although the

Mehmet Dayi, Ece B. Kasapoğlu Uludamar, Süleyman Akbulut, İ. Halil Elekcioğlu

journal of nematology, Volume 51 , 1–6

research-article | 30-November-2020

Muscles of the male and female copulatory organs of Bursaphelenchus mucronatus and Chiloplacus sp. (Nematoda: Rhabditida)

Nematodes are an important component of the detrital food web that recycles biogenic substances in the biosphere (Odum, 1983). Among the saproxylic nematodes, the leading role is played by bacterial feeders and entomophilic fungal and plant feeders. The latter group includes species of the genus Bursaphelenchus that comprises 130 valid species (based on the authors’ database; Ryss et al., 2005; Ryss and Subbotin, 2017). Species of the genus have a major significance as plant pathogens

Alexander Ryss, Anatoly A. Petrov

Journal of Nematology, Volume 53 , 1–21

Research Article | 03-December-2018

Improved 18S small subunit rDNA primers for problematic nematode amplification

primers were developed based on a very large 276 taxon alignment of 124 agriculturally important nematode species, and tested on problematic nematode taxa such as Aphelenchoides, Bursaphelenchus, Ditylenchus, and Panagrolaimus. New primers and protocols are provided for successful generation of sequences useful in future investigations of nematode systematics.

L. K. Carta, S. Li

Journal of Nematology, Volume 50 , ISSUE 4, 533–542

Research Article | 26-September-2018

Occurrence of Sheraphelenchus sucus (Nematoda: Aphelenchoidinae) and Panagrellus sp. (Rhabditida: Panagrolaimidae) Associated with Decaying Pomegranate Fruit in Italy

rRNA gene, D2–D3 expansion domains of the 28S rDNA, the ITS region, and the partial mitochondrial COI were carried out. Sequences of the 18S rRNA gene, the D2–D3 domains, and the ITS were analyzed using several methods for inferring phylogeny to reconstruct the relationships among Sheraphelenchus and Bursaphelenchus species. The bacterial feeder Panagrellus sp. was characterized at the molecular level only. The D2–D3 expansion domains and ITS sequences of this Italian panagrolaimid were determined


Journal of Nematology, Volume 49 , ISSUE 4, 418–426

Research Article | 26-September-2018

Chemical Signals of Vector Beetle Facilitate the Prevalence of a Native Fungus and the Invasive Pinewood Nematode

In China, the invasive Bursaphelenchus xylophilus, the vector Monochamus alternatus beetle, and associated fungi exhibit a symbiotic relationship causing serious losses to pine forests. Although this complex system has been intensively investigated, the role of vector beetles on the development of associated fungi and their indirect contribution to the prevalence of pinewood nematode (PWN) is yet unknown. Here, three of the highly prevalent fungal species, viz., Sporothrix sp. 1, Ophiostoma ips


Journal of Nematology, Volume 49 , ISSUE 4, 341–347

research-article | 11-March-2021

Morphology, development stages, and phylogeny of the Rhabditolaimus ulmi (Nematoda: Diplogastridae), a phoront of the bark beetle Scolytus multistriatus from the elm Ulmus glabra Huds. in Northwest Russia

Among wood- and bark-inhabiting nematodes, the fungal feeders in the family Aphelenchoididae, such as the pinewood nematode, Bursaphelenchus xylophilus (Nickle, 1970; Steiner and Buhrer, 1934) and the red ring nematode, B. cocophilus (Baujard, 1989; Cobb, 1919) have been studied extensively because of the devastating diseases they cause on pines and palms, respectively, and their spreading capabilities using insect vectors (Jones et al., 2013; Mota et al., 1999; Ryss et al., 2005). In the

Alexander Y. Ryss, Kristina S. Polyanina, Sergio Álvarez-Ortega, Sergei A. Subbotin

Journal of Nematology, Volume 53 , 1–25

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