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Journal of Nematology

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https://www.readbyqxmd.com/read/28706321/cryptaphelenchus-varicaudatus-n-sp-rhabditida-ektaphelenchinae-from-tehran-province-iran
#1
Majid Pedram
Cryptaphelenchus varicaudatus n. sp. is described and illustrated. It was isolated from bark samples of dead or dying pine (Pinus spp.) trees with bark beetle frass and galleries, in Tehran province. The new species has 275- to 367-µm-long females (a medium-sized species) with distinctly annulated cuticle having three bands in lateral fields, lip region continuous with body contour, delicate knobbed stylet, monodelphic-prodelphic reproductive system with distinct spermatheca, short postvulval uterine sac (PUS), transverse vulval slit with raised posterior lip and body narrowing behind it, sclerotized vagina, simple intestine ending in a blind sac, having no rectum but vestigial anus in some specimens, and distal body end tip (tail tip) with variation in morphology (shape), from sharply or slightly pointed to bluntly rounded...
June 2017: Journal of Nematology
https://www.readbyqxmd.com/read/28706320/numerical-taxonomy-helps-identification-of-merliniidae-and-telotylenchidae-nematoda-tylenchoidea-from-iran
#2
Reza Ghaderi, Habiballah Hamzehzarghani, Akbar Karegar
Numerical taxonomy was used for identification and grouping of the genera, species, and populations in the families Merliniidae and Telotylenchidae. The variability of each of 44 morphometric characters was evaluated by calculation of the coefficient of variability (CV) and the ratio of extremes (max/min) in the range of 1,020 measured females. Also correlation and regression analyses were made between characters to find potential collinearities. Hierarchical cluster analysis (HCA) was used for (i) grouping 21 genera in the superfamily Dolichodoroidea based on literature data coded for states of 18 diagnostic characters, and (ii) for grouping Iranian populations belonging to selected genera...
June 2017: Journal of Nematology
https://www.readbyqxmd.com/read/28706319/redefinition-of-genus-malenchus-andr%C3%A3-ssy-1968-tylenchomorpha-tylenchidae-with-additional-data-on-ecology
#3
Xue Qing, Wim Bert
Malenchus is the second specious genus in Tylenchidae. In the presented study, we examined 22 populations including 12 type/paratype species. Detailed morphology was recovered using light microscopy, scanning- and transmission- electron microscopy. All population and type slides were recorded as picture and video vouchers, which are available online. We have compared inter- or intraspecific variations and extracted taxonomically informative traits. Amended definitions of the Malenchus as well as the closely related Ottolenchus were given based on a combination of morphology and recent molecular data, and their phylogeny were analyzed in a context of Tylenchidae...
June 2017: Journal of Nematology
https://www.readbyqxmd.com/read/28706318/diversity-of-root-knot-nematodes-associated-with-tubers-of-yam-dioscorea-spp-established-using-isozyme-analysis-and-mitochondrial-dna-based-identification
#4
Yao A Kolombia, Gerrit Karssen, Nicole Viaene, P Lava Kumar, Nancy de Sutter, Lisa Joos, Danny L Coyne, Wim Bert
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 identified using enzyme phenotyping (esterase and malate dehydrogenase) and mitochondrial DNA (mtDNA) NADH dehydrogenase subunit 5 (Nad5) barcoding...
June 2017: Journal of Nematology
https://www.readbyqxmd.com/read/28706317/deladenus-posteroporus-n-sp-nematoda-neotylenchidae-isolated-from-packaging-wood-from-canada-and-white-pine-pinus-monticola-lumber-from-the-united-states-and-intercepted-in-ningbo-china
#5
Qing Yu, Jianfeng Gu, Weimin Ye, Rusong Li, Jie He
Deladenus posteroporus n. sp. isolated from packaging wood originated from Canada and from white pine lumber from the United States, both intercepted in the port of Ningbo, China, is described and illustrated. Both mycetophagous and infective forms were recovered from the Canadian sample, whereas only the mycetophagous form was found in the U.S. SAMPLE: The new species is characterized by the posteriorly positioned excretory pore relative to the hemizonid in both mycetophagous and infective forms, by a broadly rounded tail end in mycetophagous females and lateral fields with 11 to 12 lines midbody in both mycetophagous females and males...
June 2017: Journal of Nematology
https://www.readbyqxmd.com/read/28706316/description-of-pseudacrobeles-pseudacrobeles-curvatus-sp-n-cephalobidae-rhabditida-in-south-korea
#6
Jiyeon Kim, Taeho Kim, Joong-Ki Park
Pseudacrobeles (Pseudacrobeles) curvatus sp. n. was collected from potato fields in Gyeongsangnam-do, South Korea. The new species shares morphological characters typical of the genus Pseudacrobeles, including three lateral incisures that fade posteriorly near the phasmid openings. The new species differs from other Pseudacrobeles species by its smaller body size and a comparatively shorter corpus relative to the isthmus length. In this study, we provide a comparison of morphometrics and diagnostic features of Pseudacrobeles species and molecular sequence data from the D2-D3 regions of the 28S ribosomal DNA (rDNA) and ITS1-5...
June 2017: Journal of Nematology
https://www.readbyqxmd.com/read/28706315/reproduction-of-meloidogyne-incognita-and-m-graminis-on-several-grain-sorghum-hybrids
#7
Katherine Hurd, Travis R Faske
A total of 27 grain sorghum hybrids were evaluated in a series of greenhouse experiments to determine their susceptibility to Meloidogyne incognita race 3 and M. graminis. Each hybrid was inoculated with 2,000 nematode eggs/pot. Reproduction by M. incognita was numerically greater than M. graminis on 93% of the hybrids tested, indicating that grain sorghum is a better host for M. incognita than M. graminis. A wide variation in host suitability was observed on these hybrids in a second experiment as reproduction by M...
June 2017: Journal of Nematology
https://www.readbyqxmd.com/read/28706314/sampling-error-in-relation-to-cyst-nematode-population-density-estimation-in-small-field-plots
#8
Vesna Župunski, Radivoje Jevtić, Vesna Spasić Jokić, Ljubica Župunski, Mirjana Lalošević, Mihajlo Ćirić, Živko Ćurčić
Cyst nematodes are serious plant-parasitic pests which could cause severe yield losses and extensive damage. Since there is still very little information about error of population density estimation in small field plots, this study contributes to the broad issue of population density assessment. It was shown that there was no significant difference between cyst counts of five or seven bulk samples taken per each 1-m(2) plot, if average cyst count per examined plot exceeds 75 cysts per 100 g of soil. Goodness of fit of data to probability distribution tested with χ(2) test confirmed a negative binomial distribution of cyst counts for 21 out of 23 plots...
June 2017: Journal of Nematology
https://www.readbyqxmd.com/read/28706313/methyl-bromide-alternatives-for-control-of-root-knot-nematode-meloidogyne-spp-in-tomato-production-in-florida
#9
Johan Desaeger, Donald W Dickson, S J Locascio
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 terms of root-knot nematode management, were the combinations 1,3-D-chloropicrin, chloropicrin-proprietary solvent ,and 1,3-D-metam sodium...
June 2017: Journal of Nematology
https://www.readbyqxmd.com/read/28706312/management-of-root-knot-nematode-meloidogyne-incognita-on-pittosporum-tobira-under-greenhouse-field-and-on-farm-conditions-in-florida
#10
Richard Baidoo, Tesfamariam Mengistu, Robert McSorley, Robert H Stamps, Janete Brito, William T Crow
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 (=Paecilomyces lilacinus) strain 251...
June 2017: Journal of Nematology
https://www.readbyqxmd.com/read/28706311/first-report-of-the-fig-cyst-nematode-heterodera-fici-kirjanova-on-fig-tree-ficus-carica-in-ontario-canada
#11
Fengcheng Sun, Neil Henry, Qing Yu
Although fig trees are a popular ornamental fruit tree in subtropical regions, some hardy species, such as Ficus carica, have been grown in the west coast of British Columbia and southern Ontario in Canada. The fig cyst nematode, Heterodera fici Kirjanova, is a pest on fig plants, and the heavy infestation can cause retarded growth and yellowing of leaves (Maqbool et al., 1987). In the spring of 2016, a sample of rhizosphere from a potted fig (F. carica) seedling was submitted to the Nematology Laboratory, Canadian Food Inspection Agency...
June 2017: Journal of Nematology
https://www.readbyqxmd.com/read/28706310/draft-transcriptome-of-globodera-ellingtonae
#12
Wendy S Phillips, Sebastian Eves-van den Akker, Inga A Zasada
Globodera ellingtonae is a newly described cyst nematode found in Idaho, Oregon, and Argentina. Here we present the first transcriptome assembly of G. ellingtonae, providing a valuable resource for comparing the evolution of expressed genes between potato cyst nematode species.
June 2017: Journal of Nematology
https://www.readbyqxmd.com/read/28706309/the-draft-genome-of-globodera-ellingtonae
#13
Wendy S Phillips, Dana K Howe, Amanda M V Brown, Sebastian Eves-van den Akker, Levi Dettwyler, Amy B Peetz, Dee R Denver, Inga A Zasada
Globodera ellingtonae is a newly described potato cyst nematode (PCN) found in Idaho, Oregon, and Argentina. Here, we present a genome assembly for G. ellingtonae, a relative of the quarantine nematodes G. pallida and G. rostochiensis, produced using data from Illumina and Pacific Biosciences DNA sequencing technologies.
June 2017: Journal of Nematology
https://www.readbyqxmd.com/read/28706308/introduction-to-nematode-genome-and-transcriptome-announcements-in-the-journal-of-nematology
#14
Dee R Denver, Erik J Ragsdale, W Kelley Thomas, Inga A Zasada
The Journal of Nematology now offers publication of Nematode Genome Announcements (NGA) and Nematode Transcriptome Announcements (NTA). These brief reports announce the sequencing and assembly of a nematode genome or transcriptome resource, along with basic technical information on DNA sequencing and bioinformatic methods used. This publishing initiative offers a new avenue to openly and concisely communicate the availability and relevance of genome and transcriptome sequence resources to the broader scientific community...
June 2017: Journal of Nematology
https://www.readbyqxmd.com/read/28512384/erratum
#15
(no author information available yet)
[This corrects the article on p. 280 in vol. 48, PMID: 28154434.].
March 2017: Journal of Nematology
https://www.readbyqxmd.com/read/28512383/effects-of-cover-crops-on-pratylenchus-penetrans-and-the-nematode-community-in-carrot-production
#16
Zane J Grabau, Zin Thu Zar Maung, D Corey Noyes, Dean G Baas, Benjamin P Werling, Daniel C Brainard, Haddish Melakeberhan
Cover cropping is a common practice in U.S. Midwest carrot production for soil conservation, and may affect soil ecology and plant-parasitic nematodes-to which carrots are very susceptible. This study assessed the impact of cover crops-oats (Avena sativa), radish (Raphanus sativus) cv. Defender, rape (Brassica napus) cv. Dwarf Essex, and a mixture of oats and radish-on plant-parasitic nematodes and soil ecology based on the nematode community in Michigan carrot production systems. Research was conducted at two field sites where cover crops were grown in Fall 2014 preceding Summer 2015 carrot production...
March 2017: Journal of Nematology
https://www.readbyqxmd.com/read/28512382/occurrence-of-belonolaimus-in-sinaloa-northwestern-mexico-a-new-report-on-distribution-and-host-range
#17
Manuel Mundo-Ocampo, J G Baldwin, T J Pereira, J R Camacho-Baez, A D Armenta-Bojorquez, M Camacho-Haro, J O Becker
The present study reports the occurrence of the genus Belonolaimus in the state of Sinaloa, Mexico, associated with native plants (i.e., Ziziphus amole and Stenocereus alamosensis) in a natural coastal ecosystem. Both morphological and molecular approaches were employed to characterize the Sinaloa population. Notwithstanding of some morphological and morphometric variation between Belonolaimus from Sinaloa and other valid species, the characterization indicates that this population might belong to the Belonolaimus longicaudatus species complex...
March 2017: Journal of Nematology
https://www.readbyqxmd.com/read/28512381/first-report-and-comparative-study-of-steinernema-surkhetense-rhabditida-steinernematidae-and-its-symbiont-bacteria-from-subcontinental-india
#18
Aashiq Hussain Bhat, Istkhar, Ashok Kumar Chaubey, Vladimir Půža, Ernesto San-Blas
Two populations (CS19 and CS20) of entomopathogenic nematodes were isolated from the soils of vegetable fields from Bijnor district, India. Based on morphological, morphometrical, and molecular studies, the nematodes were identified as Steinernema surkhetense. This work represents the first report of this species in India. The infective juveniles (IJs) showed morphometrical and morphological differences, with the original description based on longer IJs size. The IJs of the Indian isolates possess six ridges in their lateral field instead of eight reported in the original description...
March 2017: Journal of Nematology
https://www.readbyqxmd.com/read/28512380/esteya-vermicola-controls-the-pinewood-nematode-bursaphelenchus-xylophilus-in-pine-seedlings
#19
Zhen Wang, Yongan Zhang, Chunyan Wang, Yunbo Wang, Chungkeun Sung
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 sawyer beetles (Coleoptera: Cerambycidae)...
March 2017: Journal of Nematology
https://www.readbyqxmd.com/read/28512379/evaluation-of-pochonia-chlamydosporia-and-purpureocillium-lilacinum-for-suppression-of-meloidogyne-enterolobii-on-tomato-and-banana
#20
Silas D Silva, Regina M D G Carneiro, Marcos Faria, Daniela A Souza, Rose G Monnerat, Rogerio B Lopes
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 Purpureocillium lilacinum strains were screened for their ability to infect eggs of the root-knot nematode M...
March 2017: Journal of Nematology
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