journal
https://read.qxmd.com/read/38516362/redetection-and-description-of-the-european-dagger-nematode-xiphinema-diversicaudatum-on-peach-prunus-persica-l-in-canada
#1
JOURNAL ARTICLE
Jerry Akanwari, Qing Yu, Tahera Sultana
The study reports the detection of Xiphinema diversicaudatum in a peach field in Ontario, Canada. Comprehensive population characterization involved morphological and molecular analyses using 18S and 28S rDNA sequences. Morphological and molecular analysis demonstrated a close relationship between the Ontario population and those from Central Europe. This is the first report of X. diversicaudatum from peaches ( Prunus persica ) in Canada and in North America.
March 2024: Journal of Nematology
https://read.qxmd.com/read/38510971/a-draft-transcriptome-announcement-of-anguina-tritici
#2
JOURNAL ARTICLE
Manish Kumar, Neeraj, Alkesh Hada, Vishal Singh Somvanshi, Ashish Kumar Singh, Yashwant Kumar Yadava, Pradeep Kumar Jain, Kishore Gaikwad, Anil Sirohi
Anguina tritici , the wheat seed gall nematode, causes the 'ear-cockle' or seed gall disease of wheat ( Triticum sp. ), leading to an extensive decline of yield (30-70%) in underdeveloped wheat cultivating countries of the world. The nematode is known to survive in anhydrobiotic conditions for up to 32 years. Here, we present the first transcriptome assembly of A. tritici , which will be a valuable resource for understanding the genes responsible for nematode survival and above-ground plant parasitism. The final 133...
March 2024: Journal of Nematology
https://read.qxmd.com/read/38510970/depth-distribution-of-plant-parasitic-nematodes-on-bentgrass-golf-greens-in-missouri-and-indiana
#3
JOURNAL ARTICLE
Asa L McCurdy, Jefferson Barizon, G L Miller
Control of plant-parasitic nematodes (PPNs) on golf putting greens with nematicides is dependent on the seasonal occurrence and depth distribution of target PPN populations. This study aimed to determine if plant-parasitic nematode populations on golf course putting greens in Missouri and Indiana peaked at a targetable depth at a specific time in the year, focusing primarily on lance ( Hoplolaimus spp.) and root-knot ( Meloidogyne spp.) nematodes. To elucidate species diversity in the region, rDNA from a subset of lance and root-knot nematodes was sequenced and analyzed, with additional micromorphology of a lance nematode assessed in scanning electron micrographs (SEM)...
March 2024: Journal of Nematology
https://read.qxmd.com/read/38495936/host-status-of-melon-carrot-and-meloidogyne-incognita-susceptible-and-resistant-cotton-cowpea-pepper-and-tomato-for-m-floridensis-from-california
#4
JOURNAL ARTICLE
Antoon T Ploeg, Scott Edwards
The host status of carrot, melon, and susceptible and resistant cultivars of tomato, cotton, cowpea, and pepper for a California isolate of the peach root-knot nematode Meloidogyne floridensis was determined in greenhouse pot experiments. It was compared to a race 3 isolate of M. incognita . Melon was an excellent host for both isolates and roots were heavily galled after the 8-week trial. Carrot was a host for M. incognita , but a poor host for M. floridensis , although both isolates caused similar levels of galling...
March 2024: Journal of Nematology
https://read.qxmd.com/read/38495935/group-movement-in-entomopathogenic-nematodes-aggregation-levels-vary-based-on-context
#5
JOURNAL ARTICLE
Glen Stevens, Muhammad Usman, Sehrish Gulzar, Cassandra Stevens, Eleanor Pimentel, Hilal Erdogan, Paul Schliekelman, Fatma Kaplan, Hans Alborn, Waqas Wakil, David Shapiro-Ilan, Edwin E Lewis
Maintenance of an aggregated population structure implies within-species communication. In mixed-species environments, species-specific aggregations may reduce interspecific competition and promote coexistence. We studied whether movement and aggregation behavior of three entomopathogenic nematode species changed when isolated, as compared to mixed-species arenas. Movement and aggregation of Steinernema carpocapsae , S. feltiae and S. glaseri were assessed in sand. Each species demonstrated significant aggregation when alone...
March 2024: Journal of Nematology
https://read.qxmd.com/read/38495934/host-status-and-susceptibility-of-cannabis-sativa-cultivars-to-root-knot-nematodes
#6
JOURNAL ARTICLE
J Coburn, J Desaeger
Root-knot nematode host status of hemp cultivars of different uses (fiber, dual, CBD/CBG) and from different regions (Europe, China, US) were evaluated in five different greenhouse trials. None of the tested cultivars showed resistance to any of the tested root-knot nematode species, and all tested hemp cultivars were good hosts for root-knot nematodes, especially to mixed populations of M. javanica and M. incognita . Root gall symptoms on hemp were less severe than on cucumber (and tomato), but reproduction rates were similar...
March 2024: Journal of Nematology
https://read.qxmd.com/read/38495933/a-de-novo-whole-genome-assembly-and-annotation-of-parelaphostrongylus-tenuis
#7
JOURNAL ARTICLE
Tyler J Garwood, Jessie E Richards, Marissa G Macchietto, Richard W Gerhold, Stephen A Kania, John R Garbe, Nicholas M Fountain-Jones, Peter A Larsen, Tiffany M Wolf
Parelaphostrongylus tenuis causes ungulate morbidity and mortality in eastern and central North America, but no reference genome sequence exists to facilitate research. Here, we present a P. tenuis genome assembly and annotation, generated with PacBio and Illumina technologies. The assembly is 491 Mbp, with 7285 scaffolds and 185 kb N50.
March 2024: Journal of Nematology
https://read.qxmd.com/read/38495932/comparative-analysis-of-soil-nematode-biodiversity-from-five-different-fruit-orchards-in-osmaneli-district-bilecik-t%C3%A3-rkiye
#8
JOURNAL ARTICLE
Taylan Çakmak
Nematode population densities were determined in 60 soil and root samples collected from 6 fruit orchards in the Bilecik province (western Turkey), between April 2022 and June 2022. The total number of identified nematodes have reached up to 2418 individuals (number of female: 1036; male: 154; and juvenile: 1228). They belong to 54 species, 54 genera, 33 families and 11 orders. Plant parasitic nematodes that were detected mostly are listed as follows: Helicotylenchus (6,12 %), Pratylenchus (5,74 %), Paratylenchus (4...
March 2024: Journal of Nematology
https://read.qxmd.com/read/38495931/first-report-of-meloidogyne-hapla-on-hemp-cannabis-sativa-in-oregon
#9
JOURNAL ARTICLE
Lester Núñez-Rodríguez, Hannah Rivedal, Amy Peetz, Cynthia M Ocamb, Inga Zasada
Hemp is a crop that has gained interest in Washington and Oregon. As with other crops, hemp production faces challenges due to biotic factors, including plant-parasitic nematodes. During a survey for plant-parasitic nematodes associated with hemp, Meloidogyne sp. was found in a composite root sample collected in Oregon. Morphological characterization of second-stage juveniles identified the nematode as Meloidogyne hapla . Molecular identification confirmed the population as M. hapla . To our knowledge, this is the first report of M...
March 2024: Journal of Nematology
https://read.qxmd.com/read/38495930/first-report-of-rhabditis-rhabditella-axei-with-the-invasive-palm-borer-paysandisia-archon
#10
JOURNAL ARTICLE
Chiara Sciandra, Sara Amoriello, Emilia Innocenti Degli, Valentina Nicotera, Francesco Barbieri, Giuseppe Mazza, Giulia Torrini, Pio Federico Roversi, Agostino Strangi
Rhabditis (Rhabditella) axei is a free-living, pseudoparasitic, necromenic, and parasitic nematode, depending on the host. This species feeds mainly on bacteria present in decaying organic matter, soil, and other substrates; however, in its parasitic form, it can colonize some species of snails. Moreover, the presence of R. axei has also been detected in birds and mammals, including humans. In 2021-2023, during monitoring of the palm borer Paysandisia archon in Central Italy, R. axei emerged from dead larvae of this alien invasive moth and was extracted from palm fibres of Trachycarpus fortunei in three independent sites...
March 2024: Journal of Nematology
https://read.qxmd.com/read/38283661/evaluation-of-fumigant-and-non-fumigant-nematicides-for-management-of-rotylenchulus-reniformis-on-sweetpotato
#11
JOURNAL ARTICLE
Tristan T Watson, Caleb S Hamm, J Cole Gregorie
Reniform nematode ( Rotylenchulus reniformis ) is a major pest of sweetpotato in many production regions in Southern United States. Applying soil fumigants and non-fumigant nematicides are the primary management strategies available to growers. This study compared the relative efficacy of nematicides (1,3-dichloropropene, fluopyram, oxamyl, fluazaindolizine, aldicarb, Majestene, and fluensulfone) for management of reniform nematode on sweetpotato. Fumigating soil with 1,3-dichloropropene consistently reduced soil population densities of reniform nematode at the time of planting in both trial years (31 - 36% reduction relative to the untreated control); however, the duration of suppression varied greatly by growing season...
February 2023: Journal of Nematology
https://read.qxmd.com/read/38264460/-meloidogyne-spp-in-eucalypts-reproduction-and-damage-to-seedling-growth
#12
JOURNAL ARTICLE
José Olívio Lopes Vieira, Renata Cunha Pereira, Mariana Zandomênico Mangeiro, Ricardo Moreira Souza
Eucalypts are cultivated worldwide, but little is known about their status as hosts of root-knot nematodes (RKN) ( Meloidogyne spp.). Moreover, information is scarce regarding the nature of the damage caused by RKN to eucalypt seedlings and trees. To investigate these aspects, we separately inoculated Meloidogyne enterolobii , M. javanica and M. incognita in seedlings of the world's most cultivated eucalypts: Eucalyptus dunni , E. grandis , E. cloeziana , E. camaldulensis , E. saligna , Corymbia citriodora , and the hybrid E...
February 2023: Journal of Nematology
https://read.qxmd.com/read/38264459/-meloidogyne-enterolobii-induced-changes-in-guava-root-exudates-are-associated-with-root-rotting-caused-by-neocosmospora-falciformis
#13
JOURNAL ARTICLE
Ricardo M Souza, Denilson F Oliveira, Vicente M Gomes, Abraão J S Viana, Geraldo H Silva, Alan R T Machado
Despite the worldwide importance of disease complexes involving root-feeding nematodes and soilborne fungi, there have been few in-depth studies on how these organisms interact at the molecular level. Previous studies of guava decline have shown that root exudates from Meloidogyne enterolobii -parasitized guava plants (NP plants), but not from nematode-free plants (NF plants), enable the fungus Neocosmospora falciformis to rot guava roots, leading to plant death. To further characterize this interaction, NP and NF root exudates were lyophilized; extracted with distinct solvents; quantified regarding amino acids, soluble carbohydrates, sucrose, phenols, and alkaloids; and submitted to a bioassay to determine their ability to enable N...
February 2023: Journal of Nematology
https://read.qxmd.com/read/38264458/first-report-of-pratylenchus-penetrans-nematoda-pratylenchidae-associated-with-artichokes-in-vietnam
#14
JOURNAL ARTICLE
Thi Duyen Nguyen, Huu Tien Nguyen, Thi Mai Linh LE, Quang Phap Trinh
Pratylenchus penetrans is one of the world's most common and destructive root-lesion nematodes and can parasitize more than 400 plant species. P. penetrans has been reported to cause serious damage to artichokes in several countries, such as Greece, Brazil, and France. Until now, there have been no reports of P. penetrans associated with artichokes in Vietnam. In this study, we recorded this species in artichoke fields in Lam Dong province, Vietnam with an average density of 50 nematodes/100g of soil (frequency of appearance at 64...
February 2023: Journal of Nematology
https://read.qxmd.com/read/38264457/population-dynamics-of-meloidogyne-graminicola-in-soil-in-different-types-of-direct-seeded-rice-agroecosystems-in-hunan-province-china
#15
JOURNAL ARTICLE
Zhuhong Yang, Lu Zhang, Xinwen Li, Yufeng Lin, Shan Ye, Zhong Ding
The rice root-knot nematode Meloidogyne graminicola is increasingly widely distributed in China and has had a severe incidence in Hunan Province. It is thus necessary to investigate its population dynamics in paddy fields. This study was conducted to ascertain the effect of direct-seeded rice agroecosystems on the population dynamics of M. graminicola and root gall development in rice. The results indicated that the population density of M. graminicola in soil was markedly influenced by the agroecosystem, rainfall and temperature...
February 2023: Journal of Nematology
https://read.qxmd.com/read/38107623/first-morphological-and-molecular-characterization-of-paratylenchus-vandenbrandei-rhabditida-tylenchulidae-in-iran
#16
JOURNAL ARTICLE
Abbas Abdolkhani, Sedighe Azimi
Paratylenchus vandenbrandei , has been recovered from the rhizospheric soil of Euphrates poplar ( Populus euphratica ) in the Karkheh protected area of Khuzestan province, southwestern Iran. The species was identified as P. vandenbrandei by the presence of three lines in the lateral fields; conoid rounded lip region; presence of submedian lobes, a stylet 24.0-28.8 μm long; an excretory pore at the level of the anterior part of the pharyngeal bulb; a round-to-oval spermatheca; presence of vulval flaps; and a conoid tail, with a terminus that is rounded or slightly pointed in some specimens...
February 2023: Journal of Nematology
https://read.qxmd.com/read/38046056/isolation-identification-of-entomopathogenic-nematodes-with-insights-into-their-distribution-in-the-syrian-coast-regions-and-virulence-against-tuta-absoluta
#17
JOURNAL ARTICLE
Mai Ali, Nada Allouf, Mohammad Ahmad
The occurrence and distribution of entomopathogenic nematodes (EPNs) in the Syrian coast regions remain relatively uncharted. To address this gap in our knowledge, an extensive survey of these ecosystems was essential. This study aims to isolate and identify EPNs from diverse ecosystems within the coastal regions. The distribution of EPNs in cultivated and natural environments was analyzed according to habitat, altitude, and sampling season factors. Between 2017 and 2020, EPNs were recovered from 27 out of 821 soil samples (3...
February 2023: Journal of Nematology
https://read.qxmd.com/read/38026555/gaba-immunoreactivity-and-pharmacological-effects-vary-among-stylet-bearing-nematodes
#18
JOURNAL ARTICLE
Hannah M Reed, Ziduan Han, Nathan E Schroeder
Plant-parasitic nematodes conduct a series of sophisticated behaviors to complete their life cycles. Among these, locomotion behaviors, including finding the host and migrating to the feeding site, directly affect the success of parasitism. Thus, disrupting locomotion behaviors has the potential to control these parasites. γ-Aminobutyric acid (GABA) is the prominent inhibitory neurotransmitter in nematodes. GABA-immunoreactive neurons are mostly found in motor neurons, where they regulate behaviors in the model nematode C...
February 2023: Journal of Nematology
https://read.qxmd.com/read/38026554/nematode-genome-announcement-a-draft-genome-of-seed-gall-nematode-anguina-tritici
#19
JOURNAL ARTICLE
Ashish Kumar Singh, Antara Das, Ila Joshi, Manish Kumar, Deshika Kohli, Pankaj, Kishor Gaikwad, Pradeep Kumar Jain, Anil Sirohi
Anguina tritici is the first plant-parasitic nematode described in literature, dating back to the year 1743. It is responsible for causing earcockle (seed gall) and tundu diseases in wheat and rye. Notably, this nematode has been observed to survive in an anhydrobiotic state for up to 32 years within wheat seed galls. These exceptional characteristics have inspired the sequencing of the A. tritici genome. In this study, we present the initial draft genome of A. tritici , obtained using the Illumina MiSeq platform with coverage of 60-fold...
February 2023: Journal of Nematology
https://read.qxmd.com/read/38026553/first-report-of-barley-root-knot-nematode-meloidogyne-naasi-from-turfgrass-in-idaho-with-multigene-molecular-characterization
#20
JOURNAL ARTICLE
Andrea M Skantar, Zafar A Handoo, Mihail R Kantor, Maria N Hult
Barley root-knot nematode, Meloidogyne naasi Franklin, 1965, is one of the most important pest nematodes infecting monocots (Franklin, 1965). Two-inch core soil samples collected from a golf course in Ada County, Idaho were submitted for identification in November of 2019. A high number of Meloidogyne sp. juveniles were recovered from both soil samples using sieving and decantation followed by the sugar centrifugal flotation method. They were examined by light microscopy, morphometric measurements, and multiple molecular markers, including the ribosomal 28S D2-D3 and intergenic spacer 2 (IGS-2) regions, mitochondrial markers cytochrome oxidase I (COI) and the interval from COII to 16S, and the protein-coding gene Hsp90...
February 2023: Journal of Nematology
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