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Journal of Nematology

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https://www.readbyqxmd.com/read/28154435/agamermis-nematoda-mermithidae-infection-in-south-carolina-agricultural-pests
#1
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
#2
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
#3
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
#4
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
#5
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
#6
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
https://www.readbyqxmd.com/read/28154429/grafting-and-paladin-pic-21-for-nematode-and-weed-management-in-vegetable-production
#7
Nancy Kokalis-Burelle, David M Butler, Jason C Hong, Michael G Bausher, Greg McCollum, Erin N Rosskopf
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 rootstocks, C. metulifer and 'Tetsukabuto', were evaluated with nongrafted 'Athena' in year 1...
December 2016: Journal of Nematology
https://www.readbyqxmd.com/read/28154428/gossypium-arboreum-accessions-resistant-to-rotylenchulus-reniformis
#8
Salliana R Stetina, John E Erpelding
In the southeastern United States, reniform nematode (Rotylenchulus reniformis) is a serious pest of upland cotton (Gossypium hirsutum), a species which has no naturally occurring resistance against this nematode. To identify sources of reniform nematode resistance in species closely related to upland cotton, 222 G. arboreum accessions from the U.S. germplasm collection were evaluated in repeated growth chamber experiments. In initial screenings, root infection was measured 4 wks after inoculation. The 15 accessions supporting the fewest infections (PI 529992, PI 615755, PI 615766, PI 615788, PI 615848, PI 615856, PI 615950, PI 615977, PI 615991, PI 616008, PI 616016, PI 616062, PI 616126, PI 616159, and A2 553) were evaluated again in confirmation tests lasting 8 wk...
December 2016: Journal of Nematology
https://www.readbyqxmd.com/read/27765995/discopersicus-n-gen-a-new-member-of-the-family-tylenchidae-%C3%A3-rley-1880-with-detailed-sem-study-on-two-known-species-of-the-genus-discotylenchus-siddiqi-1980-nematoda-tylenchidae-from-iran
#9
Ali Yaghoubi, Ebrahim Pourjam, Sergio Álvarez-Ortega, Gracia Liébanas, Mohammad Reza Atighi, Majid Pedram
Discopersicus iranicus n. gen., n. comb., previously described from Iran as a new species under the genus Discotylenchus, is illustrated using light microscope and scanning electron microscope (SEM) observations and further studied using molecular characters. SEM studies revealed the newly proposed genus has oblique amphidial apertures on the lateral sides of the lip region. SEM images are also provided for two species of Discotylenchus, namely D. discretus and D. brevicaudatus, as the first SEM study of the genus...
September 2016: Journal of Nematology
https://www.readbyqxmd.com/read/27765994/morphological-and-molecular-characterization-of-gracilacus-wuae-n-sp-nematoda-criconematoidea-associated-with-cow-parsnip-heracleum-maximum-in-ontario-canada
#10
Qing Yu, Weimin Ye, Tom Powers
Gracilacus wuae n. sp. from soil associated with cow parsnip in Ontario, Canada is described and illustrated. Morphologically, females have a long stylet ranging from 80 to 93 µm long, the lip region not offset from the body contour, without lateral lips but with large and flat submedian lobes, the mouth opening slit-like elongated laterally and surrounded by lateral flaps, the excretory pore is anterior to the knobs of the stylet; males without stylet and the pharynx degenerated. The fourth-stage juveniles lack a stylet, the pharynx degenerated, and can be differentiated into preadult females and males based on the position of the genital primordia...
September 2016: Journal of Nematology
https://www.readbyqxmd.com/read/27765993/mitochondrial-haplotype-based-identification-of-root-knot-nematodes-meloidogyne-spp-on-cut-foliage-crops-in-florida
#11
Richard Baidoo, Soumi Joseph, Tesfamariam M Mengistu, Janete A Brito, Robert McSorley, Robert H Stamps, William T Crow
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 and (ii) evaluate the feasibility of using the mtDNA haplotype as a molecular diagnostic tool for rapid identification of large samples of RKN...
September 2016: Journal of Nematology
https://www.readbyqxmd.com/read/27765992/evaluation-of-steam-and-soil-solarization-for-meloidogyne-arenaria-control-in-florida-floriculture-crops
#12
Nancy Kokalis-Burelle, Erin N Rosskopf, David M Butler, Steven A Fennimore, John Holzinger
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 solarization using standard 7...
September 2016: Journal of Nematology
https://www.readbyqxmd.com/read/27765991/effect-of-application-timing-of-oxamyl-in-nonbearing-raspberry-for-pratylenchus-penetrans-management
#13
Inga A Zasada, Thomas W Walters
In 2012, the Washington raspberry (Rubus idaeus) industry received a special local needs (SLN) 24(c) label to apply Vydate L(®) (active ingredient oxamyl) to nonbearing raspberry for the management of Pratylenchus penetrans. This is a new use pattern of this nematicide for raspberry growers; therefore, research was conducted to identify the optimum spring application timing of oxamyl for the suppression of P. penetrans. Three on-farm trials in each of 2012 and 2013 were established in Washington in newly planted raspberry trials on a range of varieties...
September 2016: Journal of Nematology
https://www.readbyqxmd.com/read/27765990/curative-control-of-the-peachtree-borer-using-entomopathogenic-nematodes
#14
David I Shapiro-Ilan, Ted E Cottrell, Russell F Mizell, Dan L Horton
The peachtree borer, Synanthedon exitiosa (Say 1823), is a major pest of stone fruit trees in North America. Current management relies upon preventative control using broad-spectrum chemical insecticides, primarily chlorpyrifos, applied in the late summer or early fall. However, due to missed applications, poor application timing, or other factors, high levels of S. exitiosa infestation may still occur and persist through the following spring. Curative treatments applied in the spring to established infestations would limit damage to the tree and prevent the next generation of S...
September 2016: Journal of Nematology
https://www.readbyqxmd.com/read/27765989/coronostoma-claireae-n-sp-nematoda-rhabditida-oxyuridomorpha-coronostomatidae-from-the-indigenous-milliped-narceus-gordanus-chamberlain-1943-diplopoda-spirobolida-in-ocala-national-forest-florida
#15
Gary Phillips, Ernest C Bernard, Robert J Pivar, John K Moulton, Rowland M Shelley
Twenty-four individuals of Narceus gordanus (Diplopoda: Spirobolidae) were collected in Ocala National Forest, FL, between November 2013 and July 2014. Each specimen was dissected to extract the intestine, which was removed and examined for parasitic nematodes. Coronostoma claireae n. sp. was collected from the hindgut and midgut of 10 specimens, and its morphology was examined with brightfield, differential interference contrast, phase contrast, and scanning electron microscopy. This species is separated from other Coronostoma spp...
September 2016: Journal of Nematology
https://www.readbyqxmd.com/read/27765988/steinernema-biddulphi-n-sp-a-new-entomopathogenic-nematode-nematoda-steinernematidae-from-south-africa
#16
Harun Cimen, Vladimír Půža, JiŘí NermuŤ, Justin Hatting, Tshima Ramakuwela, Selcuk Hazir
A new species of entomopathogenic nematode (EPN), Steinernema biddulphi n. sp., was isolated from a maize field in Senekal, Free State Province of South Africa. Morphological and molecular studies indicated the distinctness of S. biddulphi n. sp. from other Steinernema species. Steinernema biddulphi n. sp. is characterized IJs with average body length of 663 μm (606-778 μm), lateral fields with six ridges in mid-body region forming the formula 2,6,2. Excretory pore located anterior to mid-pharynx (D% = 46)...
September 2016: Journal of Nematology
https://www.readbyqxmd.com/read/27765987/first-report-of-heterorhabditis-amazonensis-from-venezuela-and-characterization-of-three-populations
#17
Naiyulin Morales, Patricia Morales-Montero, Vladimir Puza, Ernesto San-Blas
During a survey in western Venezuela in 2011, three new populations of Heterorhabditis amazonensis (LPV081, LPV156, and LPV498) were isolated. Some differences were found in terms of morphometry compared with the original description; however, the distance from the anterior end to the excretory pore is the most variable character; significantly shorter in all infective juveniles and in other developmental stages depending on the population. According to a Principal Component Analysis, LPV498 possesses more differences in morphometric characteristics and can be separated from the other two...
September 2016: Journal of Nematology
https://www.readbyqxmd.com/read/27765986/first-report-of-the-spiral-nematode-rotylenchus-incultus-nematoda-hoplolaimidae-from-cultivated-olive-in-tunisia-with-additional-molecular-data-on-rotylenchus-eximius
#18
Ilhem Guesmi-Mzoughi, Antonio Archidona-Yuste, Carolina Cantalapiedra-Navarrete, Hajer Regaieg, Najet Horrigue-Raouani, Juan E Palomares-Rius, Pablo Castillo
Spiral nematode species of the genus Rotylenchus have been reported on olive (Olea europaea L.) in several Mediterranean countries (Castillo et al., 2010; Ali et al., 2014). Nematological surveys for plant-parasitic nematodes on olive trees were carried out in Tunisia between 2013 and 2014, and two nematode species of Rotylenchus were collected from the rhizosphere of olive cv. Chemlali in several localities of Tunisia (Tables 1,2 [Table: see text] [Table: see text] ). Twenty-two soil samples of 3 to 4 kg were collected with a shovel from the upper 50 cm of soil from arbitrarily chosen olive trees...
September 2016: Journal of Nematology
https://www.readbyqxmd.com/read/27765985/first-report-of-longidorus-kuiperi-and-rotylenchus-eximius-from-coastal-sand-dunes-in-crete-greece
#19
Emmanuel A Tzortzakakis, Carolina Cantalapiedra-Navarrete, Antonio Archidona-Yuste, Juan E Palomares-Rius, Pablo Castillo
Plant-parasitic nematode species have been reported on several occasions from coastal sand dunes, including Longidorus and Rotylenchus species (Vovlas et al., 2008; De Luca et al., 2009; Mateille et al., 2014). In April 2016, 10 soil samples of 3 to 4 kg from the rhizosphere of Tamarix smyrnensis with different vegetation around (viz. Elymus farctus, Lycium schweinfurthii, Crithmum maritimum, and Arthrocnemum sp.) were collected for diagnosis of plant-parasitic nematodes. The area of sampling was a coastal sand dune near the archeological site of Komos, southwest of Crete, Greece...
September 2016: Journal of Nematology
https://www.readbyqxmd.com/read/27418706/the-effects-of-nutrient-concentration-addition-of-thickeners-and-agitation-speed-on-liquid-fermentation-of-steinernema-feltiae
#20
Luis G Leite, David I Shapiro-Ilan, Selcuk Hazir, Mark A Jackson
Entomopathogenic nematode production in liquid fermentation still requires improvements to maximize efficiency, yield, and nematode quality. Therefore, this study was aimed at developing a more suitable liquid medium for mass production of Steinernema feltiae, by assessing the effects of nutrient concentration, thickeners (primarily agar), and agitation speed on infective juvenile (IJ) yield. Base medium (BM) contained yeast extract (2.3%), egg yolk (1.25%), NaCl (0.5%), and corn oil (4%). All media were inoculated with Xenorhabdus bovienii, and 2 d later, with 2-d-old S...
June 2016: Journal of Nematology
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