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Journal of Nematology

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https://www.readbyqxmd.com/read/28512384/erratum
#1
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[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
#2
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
#3
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
#4
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
#5
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
#6
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
https://www.readbyqxmd.com/read/28512378/description-of-aphelenchoides-macrospica-n-sp-nematoda-aphelenchoididae-from-northwestern-iran
#7
Behrouz Golhasan, Ramin Heydari, Mehrab Esmaeili, Esmaeil Miraeiz
Aphelenchoides macrospica n. sp. is described and illustrated from the West Azerbayjan province, northwestern Iran. The new species is characterized by its body length of 807 to 963 μm (males) and 792 to 1,094 μm (females), offset cephalic region, lateral fields with four incisures, long stylet with 15 to 16 μm length, and excretory pore situated opposite or behind the nerve ring. Pharyngeal glands overlapping intestine dorsally and extending for 90 to 121 μm, tail terminus mucronate in both sexes. Vagina directed anteriad, and spicules are relatively large (27-32 μm) with well-developed broadly rounded apex and condylus...
March 2017: Journal of Nematology
https://www.readbyqxmd.com/read/28512377/species-delimitation-and-description-of-mesocriconema-nebraskense-n-sp-nematoda-criconematidae-a-morphologically-cryptic-parthenogenetic-species-from-north-american-grasslands
#8
Magdalena Olson, Timothy Harris, Rebecca Higgins, Peter Mullin, Kirsten Powers, Sean Olson, Thomas O Powers
Nematode surveys of North American grasslands conducted from 2010 to 2015 frequently recovered a species of criconematid nematode morphologically resembling Mesocriconema curvatum. These specimens were recovered from remnant native prairies in the central tallgrass ecoregion of North America, and not from surrounding agroecosystems. Historical records indicate that M. curvatum is a cosmopolitan species feeding on a wide range of agronomic and native plants. DNA barcoding indicates North American grasslands contain at least 10 phylogenetically distinct lineages of Mesocriconema that resemble, but are not, M...
March 2017: Journal of Nematology
https://www.readbyqxmd.com/read/28512376/oscheius-microvilli-n-sp-nematoda-rhabditidae-a-facultatively-pathogenic-nematode-from-chongming-island-china
#9
Guixin Zhou, Huan Yang, Feng Wang, Haoran Bao, Guoxiang Wang, Xianglong Hou, Jian Lin, Gabriel Yedid, Keyun Zhang
A new species, Oscheius microvilli n. sp., was found on Chongming Island (Shanghai, China). The new species is morphologically similar to the type strain of Oscheius myriophilus, but can be distinguished from it and other species of Oscheius on the basis of unique morphological characteristics of the bursa as well as male papillae. In this new species, the male bursal papillar formula is 2, 1, 3, 3 with everted tips in the first, fifth, and seventh pairs. The bursal rim is jagged, joins together anterior to the spicules, and is partially extended and decorated with microvilli...
March 2017: Journal of Nematology
https://www.readbyqxmd.com/read/28512375/a-simple-express-technique-to-process-nematodes-for-collection-slide-mounts
#10
Alexander Y Ryss
The new simple technique of hot fixation and a method for processing a mass quantity of nematodes to prepare nematode collection slides for taxonomic and ecological purposes, combined with an abrupt reduction of the set of procedures caused by the "cocktail" principle (a stratification of layers with a gradient of glycerol concentrations), are described.
March 2017: Journal of Nematology
https://www.readbyqxmd.com/read/28512374/description-of-enchodorus-yeatsi-n-sp-dorylaimida-nordiidae-from-southern-iran-and-its-molecular-phylogenetic-study
#11
Majid Pedram
Enchodorus yeatsi n. sp., a new species of the rare genus Enchodorus is described and illustrated based on its morphological and molecular characters. It was recovered from southern Iran. Females of the new species are characterized by having 1,511.3- to 1,792.5-µm long slender body, angular lip region having prominent papillae, 12- to 13-µm long odontostyle, double guiding ring, simple rod-like odontophore, didelphic-amphidelphic reproductive system, and 102- to 160-µm long elongate-conoid tail with rounded tip...
March 2017: Journal of Nematology
https://www.readbyqxmd.com/read/28512373/assessment-of-globodera-pallida-rna-extracted-from-solanum-roots
#12
N Carol Casavant, Joseph C Kuhl, Fangming Xiao, Allan B Caplan, Louise-Marie Dandurand
The introduction of high-throughput sequencing technologies has made transcriptome analyses of plant-pathogen interactions almost routine. Nevertheless, it is still challenging to obtain RNA from populations made up of two species. An RNA extraction method that worked well on free-living Caenorhabditis elegans failed when applied to isolated Globodera pallida J2 larva. Furthermore, alternative protocols that extracted RNA from free-living J2 larva produced less satisfactory results once the animals entered their hosts' roots...
March 2017: Journal of Nematology
https://www.readbyqxmd.com/read/28512372/characterization-of-lilium-longiflorum-cv-nellie-white-infection-with-root-lesion-nematode-pratylenchus-penetrans-by-bright-field-and-transmission-electron-microscopy
#13
Paulo Vieira, Joseph Mowery, James Kilcrease, Jonathan D Eisenback, Kathryn Kamo
Lilium longiflorum cv. Nellie White, commonly known as Easter lily, is an important floral crop with an annual wholesale value of over $26 million in the United States. The root-lesion nematode, Pratylenchus penetrans, is a major pest of lily due to the significant root damage it causes. In this study, we investigated the cytological aspects of this plant-nematode interaction using bright-field and transmission electron microscopy. We took advantage of an in vitro culture method to multiply lilies and follow the nematode infection over time...
March 2017: Journal of Nematology
https://www.readbyqxmd.com/read/28512371/first-report-of-the-spiral-nematode-helicotylenchus-microlobus-infecting-soybean-in-north-dakota
#14
Guiping Yan, Addison Plaisance, Danqiong Huang, Zafar A Handoo
Spiral nematodes (Helicotylenchus spp.) are common plant-parasitic nematodes in fields of many crops. In June 2015, two soil samples were collected from a soybean field in Richland County, ND. Nematodes were extracted from soil using the sugar centrifugal flotation method (Jenkins, 1964). Plant-parasitic nematodes were identified to genus based on morphological features and counted. Both samples contained spiral nematodes from 1,500 to 3,300 per kilogram of soil. In June and August 2016, 10 soil samples were collected from the same field...
March 2017: Journal of Nematology
https://www.readbyqxmd.com/read/28154435/agamermis-nematoda-mermithidae-infection-in-south-carolina-agricultural-pests
#15
Francesca L Stubbins, Paula Agudelo, Francis P F Reay-Jones, Jeremy K Greene
Native and invasive stink bugs (Hemiptera: Pentatomidae) and the closely related invasive Megacopta cribraria (Hemiptera: Plataspidae) are agricultural pests in the southeastern United States. Natural enemies, from various phyla, parasitize these pests and contribute to population regulation. We specifically investigated Nematoda infections in pentatomid and plataspid pests in one soybean field in South Carolina in 2015. Nematodes were identified through molecular and morphological methods and assigned to family Mermithidae, genus Agamermis...
December 2016: Journal of Nematology
https://www.readbyqxmd.com/read/28154434/new-cyst-nematode-heterodera-sojae-n-sp-nematoda-heteroderidae-from-soybean-in-korea
#16
Heonil Kang, Geun Eun, Jihye Ha, Yongchul Kim, Namsook Park, Donggeun Kim, Insoo Choi
A new soybean cyst nematode Heterodera sojae n. sp. was found from the roots of soybean plants in Korea. Cysts of H. sojae n. sp. appeared more round, shining, and darker than that of H. glycines. Morphologically, H. sojae n. sp. differed from H. glycines by fenestra length (23.5-54.2 µm vs. 30-70 µm), vulval silt length (9.0-24.4 µm vs. 43-60 µm), tail length of J2 (54.3-74.8 µm vs. 40-61 µm), and hyaline part of J2 (32.6-46.3 µm vs. 20-30 µm). It is distinguished from H. elachista by larger cyst (513...
December 2016: Journal of Nematology
https://www.readbyqxmd.com/read/28154433/data-on-some-species-of-the-genus-coslenchus-siddiqi-1978-rhabditida-tylenchidae-from-iran
#17
Yousef Panahandeh, Ebrahim Pourjam, Majid Pedram
Data on five known species of the genus Coslenchus are provided. Morphological and morphometric data are given for all studied species. Three of the recovered species were also characterized by molecular phylogenetic data. The species C. leiocephalus was studied for the first time since its original description. Males of the species, C. franklinae and C. oligogyrus were described for the first time and the species C. oligogyrus was reported from Iran for the first time. In molecular phylogenetic studies based on partial sequences of 28S rDNA D2/D3 fragments, all species formed a clade with high Bayesian posterior probability in Bayesian inference, indicating the monophyly of the genus...
December 2016: Journal of Nematology
https://www.readbyqxmd.com/read/28154432/are-entomopathogenic-nematodes-effective-biological-control-agents-against-the-carob-moth-ectomyelois-ceratoniae
#18
Zahra Memari, Javad Karimi, Shokoofeh Kamali, Seyed Hossein Goldansaz, Mojtaba Hosseini
The carob moth (Ectomyelois ceratoniae) is the key pest of pomegranate, which causes a significant percentage of losses in pomegranate orchards and warehouses of Iran annually. The pest larvae are characterized by displaying a cryptic behavior within the fruit, which avoids most routine control techniques, especially chemical method. The low efficiency of traditional measurements and also the rich species diversity of natural enemies within the infested fruits highlight the necessity of exploring effective control methods, especially environmental friendly approaches...
December 2016: Journal of Nematology
https://www.readbyqxmd.com/read/28154431/acetic-acid-2-undecanone-and-e-2-decenal-ultrastructural-malformations-on-meloidogyne-incognita
#19
Nikoletta Ntalli, Marlena Ratajczak, Chrisostomos Oplos, Urania Menkissoglu-Spiroudi, Zbigniew Adamski
The use of natural compounds to control phytonematodes is significantly increasing, as most of the old synthetic pesticides have been banned due to their eco-hostile character. Plant secondary metabolites are now evaluated as biologically active molecules against Meloidogyne spp. but their target site in the nematode body is rarely specified. Herein, we report on the ultrastructure modifications of the Meloidogyne incognita J2 after treatment with nematicidal plant secondary metabolites, that is acetic acid, (E)-2-decenal, and 2-undecanone...
December 2016: Journal of Nematology
https://www.readbyqxmd.com/read/28154430/distribution-and-longevity-of-pratylenchus-penetrans-in-the-red-raspberry-production-system
#20
Duncan R Kroese, Jerry E Weiland, Inga A Zasada
One of the major constraints on the production of red raspberries in the Pacific Northwest is the presence of the root-lesion nematode Pratylenchus penetrans. Current management of this nematode relies heavily on preplant soil fumigation; however, regulations have made the practice more difficult and expensive. Additional issues with soil fumigation include lack of efficacy at deeper soil depths and potential inability to penetrate raspberry root material that remains in the field during fumigation which may harbor P...
December 2016: Journal of Nematology
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