Journal of nematology最新文献

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External and Internal Microbiomes of Antarctic Nematodes are Distinct, but More Similar to each other than the Surrounding Environment. 南极线虫的外部和内部微生物群不同,但比周围环境更相似。
IF 1.3 4区 生物学
Journal of nematology Pub Date : 2023-03-09 eCollection Date: 2023-02-01 DOI: 10.2478/jofnem-2023-0004
J Parr McQueen, K Gattoni, E M S Gendron, S K Schmidt, P Sommers, D L Porazinska
{"title":"External and Internal Microbiomes of Antarctic Nematodes are Distinct, but More Similar to each other than the Surrounding Environment.","authors":"J Parr McQueen, K Gattoni, E M S Gendron, S K Schmidt, P Sommers, D L Porazinska","doi":"10.2478/jofnem-2023-0004","DOIUrl":"10.2478/jofnem-2023-0004","url":null,"abstract":"<p><p>Host-associated microbiomes have primarily been examined in the context of their internal microbial communities, but many animal species also contain microorganisms on external host surfaces that are important to host physiology. For nematodes, single strains of bacteria are known to adhere to the cuticle (e.g., <i>Pasteuria penetrans</i>), but the structure of a full external microbial community is uncertain. In prior research, we showed that internal gut microbiomes of nematodes (<i>Plectus murrayi</i>, <i>Eudorylaimus antarcticus</i>) and tardigrades from Antarctica's McMurdo Dry Valleys were distinct from the surrounding environment and primarily driven by host identity. Building on this work, we extracted an additional set of individuals containing intact external microbiomes and amplified them for 16S and 18S rRNA metabarcoding. Our results showed that external bacterial microbiomes were more diverse than internal microbiomes, but less diverse than the surrounding environment. Host-specific bacterial compositional patterns were observed, and external microbiomes were most similar to their respective internal microbiomes. However, external microbiomes were more influenced by the environment than the internal microbiomes were. Non-host eukaryotic communities were similar in diversity to internal eukaryotic communities, but exhibited more stochastic patterns of assembly compared to bacterial communities, suggesting the lack of a structured external eukaryotic microbiome. Altogether, we provide evidence that nematode and tardigrade cuticles are inhabited by robust bacterial communities that are substantially influenced by the host, albeit less so than internal microbiomes are.</p>","PeriodicalId":16475,"journal":{"name":"Journal of nematology","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2023-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10035304/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10289938","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Molecular and Morphological Characterization of Tylenchus Zeae n. Sp. (Nematoda: Tylenchida) from Corn (Zea Mays) in South Carolina. 来自南卡罗来纳州玉米的玉米Tylenchus Zeae n.Sp.(线虫目:Tylenchida)的分子和形态特征。
IF 1.4 4区 生物学
Journal of nematology Pub Date : 2023-02-28 eCollection Date: 2023-02-01 DOI: 10.2478/jofnem-2023-0003
Mihail R Kantor, Zafar A Handoo, Sergei A Subbotin, Joseph D Mowery, Maria N Hult, Stephen Rogers, Andrea M Skantar
{"title":"Molecular and Morphological Characterization of <i>Tylenchus Zeae</i> n. Sp. (Nematoda: Tylenchida) from Corn (<i>Zea Mays</i>) in South Carolina.","authors":"Mihail R Kantor, Zafar A Handoo, Sergei A Subbotin, Joseph D Mowery, Maria N Hult, Stephen Rogers, Andrea M Skantar","doi":"10.2478/jofnem-2023-0003","DOIUrl":"10.2478/jofnem-2023-0003","url":null,"abstract":"<p><p>Specimens of a tylenchid nematode were recovered in 2019 from soil samples collected from a corn field, located in Pickens County, South Carolina, USA. A moderate number of <i>Tylenchus</i> sp. adults (females and males) were recovered. Extracted nematodes were examined morphologically and molecularly for species identification, which indicated that the specimens of the tylenchid adults were a new species, described herein as <i>Tylenchus zeae</i> n. sp. Morphological examination and the morphometric details of the specimens were very close to the original descriptions of <i>Tylenchus sherianus</i> and <i>T. rex</i>. However, females of the new species can be differentiated from these species by body shape and length, shape of excretory duct, distance between anterior end and esophageal intestinal valve, and a few other characteristics given in the diagnosis. Males of the new species can be differentiated from the two closely related species by tail, spicules, and gubernaculum length. Cryo-scanning electron microscopy confirmed head bearing five or six annules; four to six cephalic sensilla represented by small pits at the rounded corners of the labial plate; a small, round oral plate; and a large, pit-like amphidial opening confined to the labial plate and extending three to four annules beyond it. Phylogenetic analysis of 18S rRNA gene sequences placed <i>Tylenchus zeae</i> n. sp. in a clade with <i>Tylenchus arcuatus</i> and several <i>Filenchus</i> spp., and the mitochondrial cytochrome oxidase c subunit 1 (<i>COI</i>) gene region separated the new species from <i>T. arcuatus</i> and other tylenchid species. In the 28S tree, <i>T. zeae</i> n. sp. showed a high level of sequence divergence and was positioned outside of the main <i>Tylenchus-Filenchus</i> clade.</p>","PeriodicalId":16475,"journal":{"name":"Journal of nematology","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2023-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9984806/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10239218","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Seinhorst Model Determined the Host-Parasite Relationships of Meloidogyne Javanica Infecting Fenugreek Cv. UM202. 用Seinhorst模型测定爪哇根结线虫感染胡芦巴Cv.UM202。
IF 1.3 4区 生物学
Journal of nematology Pub Date : 2023-02-28 eCollection Date: 2023-02-01 DOI: 10.2478/jofnem-2023-0005
Hera Nadeem, Amir Khan, Rishil Gupta, Arshi Anees, Faheem Ahmad
{"title":"A Seinhorst Model Determined the Host-Parasite Relationships of <i>Meloidogyne Javanica</i> Infecting Fenugreek Cv. UM202.","authors":"Hera Nadeem, Amir Khan, Rishil Gupta, Arshi Anees, Faheem Ahmad","doi":"10.2478/jofnem-2023-0005","DOIUrl":"10.2478/jofnem-2023-0005","url":null,"abstract":"<p><p>Root-knot nematodes (RKNs) have been shown to be challenging and persistent pests of economic crops worldwide. Among RKNs, <i>Meloidogyne javanica</i> is particularly important, as it rapidly spreads and has a diverse host range. Measuring its damaging threshold level will help us to develop management strategies for adequate plant protection against nematodes. In our study, we observed the relationship between a linear series of 12 initial population densities (P<sub>i</sub>) of <i>M. javanica</i>, i.e., 0, 0.125, 0.25, 0.5, 1, 2, 4, 8, 16, 32, 64, and 128 second-staged juveniles (J2s) g<sup>-1</sup> soil, and fenugreek cv. UM202 growth parameters were investigated using a Seinhorst model. A Seinhorst model was fitted to shoot length and dry weight data for fenugreek plants. A positive correlation was found between J2s inoculum levels and percent reductions in growth parameters. The 1.3 J2s of <i>M. javanica</i> g<sup>-1</sup> soil were found to damage threshold levels with respect to shoot length and shoot dry weight of fenugreek plants. The minimum relative values (m) for shoot length and shoot dry weight were 0.15 and 0.17, respectively, at P<sub>i</sub> =128 J2s g<sup>-1</sup> soil. The maximum nematode reproduction rate (P<sub>f</sub> /P<sub>i</sub>) was 31.6 at an initial population density (P<sub>i</sub>) of 2 J2s g<sup>-1</sup> soil.</p>","PeriodicalId":16475,"journal":{"name":"Journal of nematology","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2023-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9984803/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10233221","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Evaluation of Meloidogyne Incognita and Rotylenchulus Reniformis Nematode-resistant Cotton Cultivars with Supplemental Corteva Agriscience Nematicides. 添加Corteva Agricscience线虫对南方根结线虫和Reniformis Rotylenchulus线虫抗性棉花品种的评价。
IF 1.4 4区 生物学
Journal of nematology Pub Date : 2023-02-17 eCollection Date: 2023-02-01 DOI: 10.2478/jofnem-2023-0001
A Kate Turner, Scott H Graham, Neha Potnis, Steve M Brown, Pat Donald, Kathy S Lawrence
{"title":"Evaluation of <i>Meloidogyne Incognita</i> and <i>Rotylenchulus Reniformis</i> Nematode-resistant Cotton Cultivars with Supplemental Corteva Agriscience Nematicides.","authors":"A Kate Turner, Scott H Graham, Neha Potnis, Steve M Brown, Pat Donald, Kathy S Lawrence","doi":"10.2478/jofnem-2023-0001","DOIUrl":"10.2478/jofnem-2023-0001","url":null,"abstract":"<p><p><i>Meloidogyne incognita</i>- and <i>Rotylenchulus reniformis</i>-resistant new cotton cultivars have recently become available, giving growers a new option in nematode management. The objectives of this study were: (i) to determine the yield potential of the new cultivars PHY 360 W3FE (<i>M. incognita</i>-resistant) and PHY 332 W3FE (<i>R. reniformis</i>-resistant) in nematode-infested fields and (ii) to evaluate the effects of combining the nematicides Reklemel (fluazaindolizine), Vydate C-LV (oxamyl), and the seed treatment BIO<sup>ST</sup> Nematicide 100 (heat killed <i>Burkholderia rinojenses</i> and its non-living spent fermentation media) with resistant cotton cultivars on nematode population levels and lint yield. Field experiments in 2020 and 2021 indicated <i>M. incognita</i> population levels were 73% lower on PHY 360 W3FE (R) and 80% lower for <i>R. reniformis</i> on the PHY 332 W3FE (R) at 40 days after planting. Nematode eggs per gram of root were further reduced an average of 86% after the addition of Reklemel and Vydate C-LV when averaging both cultivars over the two years. Tests with BIO<sup>ST</sup> Nematicide 100 + Reklemel + Vydate C-LV (0.56 + 2.5 L/ha) in both <i>M. incognita</i> and <i>R. reniformis</i> fields produced higher lint yields. Overall, planting PHY 360 W3FE (R) and PHY 332 W3FE (R) improved yields an average of 364 kg/ha while limiting nematode population increases. The addition of the nematicides further increased yields 152 kg/ha of the nematode-resistant cultivars.</p>","PeriodicalId":16475,"journal":{"name":"Journal of nematology","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2023-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9984807/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10233220","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
De Novo Genome Assembly of Auanema Melissensis, a Trioecious Free-Living Nematode. 一种雌雄同株的自由生活线虫 Auanema Melissensis 的全新基因组组装。
IF 1.4 4区 生物学
Journal of nematology Pub Date : 2023-02-07 eCollection Date: 2022-02-01 DOI: 10.2478/jofnem-2022-0059
Sophie Tandonnet, Maairah Haq, Anisa Turner, Theresa Grana, Panagiota Paganopoulou, Sally Adams, Sandhya Dhawan, Natsumi Kanzaki, Isabelle Nuez, Marie-Anne Félix, André Pires-daSilva
{"title":"<i>De Novo</i> Genome Assembly of <i>Auanema Melissensis</i>, a Trioecious Free-Living Nematode.","authors":"Sophie Tandonnet, Maairah Haq, Anisa Turner, Theresa Grana, Panagiota Paganopoulou, Sally Adams, Sandhya Dhawan, Natsumi Kanzaki, Isabelle Nuez, Marie-Anne Félix, André Pires-daSilva","doi":"10.2478/jofnem-2022-0059","DOIUrl":"10.2478/jofnem-2022-0059","url":null,"abstract":"<p><p>Nematodes of the genus <i>Auanema</i> are interesting models for studying sex determination mechanisms because their populations consist of three sexual morphs (males, females, and hermaphrodites) and produce skewed sex ratios. Here, we introduce a new undescribed species of this genus, <i>Auanema melissensis</i> n. sp., together with its draft nuclear genome. This species is also trioecious and does not cross with the other described species <i>A. rhodensis</i> or <i>A. freiburgensis</i>. Similar to <i>A. freiburgensis</i>, <i>A. melissensis</i>' maternal environment influences the hermaphrodite versus female sex determination of the offspring. The genome of <i>A. melissensis</i> is ~60 Mb, containing 11,040 protein-coding genes and 8.07% of repeat sequences. Using the estimated ancestral chromosomal gene content (Nigon elements), it was possible to identify putative X chromosome scaffolds.</p>","PeriodicalId":16475,"journal":{"name":"Journal of nematology","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2023-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9984802/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9408551","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
First Report of Meloidogyne javanica Infecting Strawberry (Fragaria × ananassa) in the United States. 在美国草莓侵染毒蝇初报。
IF 1.3 4区 生物学
Journal of nematology Pub Date : 2023-02-01 DOI: 10.2478/jofnem-2023-0034
Clemen J Oliveira, Gabrieli Riva, Janete A Brito, Ruimim Xue, Johan A Desaeger
{"title":"First Report of <i>Meloidogyne javanica</i> Infecting Strawberry (<i>Fragaria</i> × <i>ananassa</i>) in the United States.","authors":"Clemen J Oliveira,&nbsp;Gabrieli Riva,&nbsp;Janete A Brito,&nbsp;Ruimim Xue,&nbsp;Johan A Desaeger","doi":"10.2478/jofnem-2023-0034","DOIUrl":"https://doi.org/10.2478/jofnem-2023-0034","url":null,"abstract":"<p><p>Strawberry (<i>Fragaria</i> × <i>ananassa</i>) is native to temperate regions. However, it has been produced in tropical areas, as a seasonal crop including in Florida, USA during the winter months. In March 2022, root galls resembling those induced by root-knot nematodes (<i>Meloidogyne</i> spp.) were observed in declining strawberry plants 'Winterstar<sup>TM</sup> FL 05-107' growing in an organic-certified research site in Hillsborough County, Florida, USA. To our knowledge, <i>M. hapla</i> is the only root-knot species reported to infect strawberry in Florida. Preliminary molecular analyses, including newly synthesized DNA sequences (TW81/AB28 = OQ469833 - OQ469836; D2A/D3B= OQ473043 - OQ473047) using extracted nematode females from the strawberry roots, initially identified the RKN as <i>M. javanica</i>. Nematode species confirmation was further performed using the morphology of the female perineal patterns and isozyme analysis, mainly esterase (EST) and malate dehydrogenase (MDH), DNA sequencing, (NAD5-F/NAD5-R) and the SCAR primer set (Fjav/Rjav), species-specific for <i>M. javanica</i>. Isozyme analyses, EST= J3, which is specific for <i>M. javanica</i> and MDH=N1, as well as the morphology of female perineal patterns, agreed with data previously reported for <i>M. javanica</i>. A pathogenicity test on strawberry 'Winterstar<sup>TM</sup> FL 05-107' transplants was performed using 10,000 eggs of the original <i>M. javanica</i> population, which induced galls on strawberry plants (Gall index, GI = 4.1) with egg masses clearly visible outside of the roots, producing an average of 1,344 eggs/gram of fresh root and 9,201 ± 4,206 eggs/root system. No galls or egg masses were observed on non-inoculated plants. Tomato 'HM 1823' was used as a control for the viability of the inoculum and showed numerous galls and egg masses (GI=5.0;). The newly obtained DNA sequences using NAD5-F/NAD5-R (OQ474970 - OQ474972) were compared with other sequences available in the GenBank and were shown to be 100% identical to five <i>M. javanica</i> populations from Polk County, Florida, USA (OM418745 - OM418749) and the complete mitochondrion genome of <i>M. javanica</i> (NC026556). To our knowledge, this is the first report of <i>M. javanica</i> infecting strawberry in the United States.</p>","PeriodicalId":16475,"journal":{"name":"Journal of nematology","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10446852/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10236534","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Reduced Sensitivity to Fluopyram in Meloidogyne graminis following Long-Term Exposure in Golf Turf 长期暴露在高尔夫草皮中,降低了禾草绵虱对氟吡喃的敏感性
4区 生物学
Journal of nematology Pub Date : 2023-02-01 DOI: 10.2478/jofnem-2023-0048
Christian L. Kammerer, Philip F. Harmon, William T. Crow
{"title":"Reduced Sensitivity to Fluopyram in <i>Meloidogyne graminis</i> following Long-Term Exposure in Golf Turf","authors":"Christian L. Kammerer, Philip F. Harmon, William T. Crow","doi":"10.2478/jofnem-2023-0048","DOIUrl":"https://doi.org/10.2478/jofnem-2023-0048","url":null,"abstract":"Abstract In recent years, some golf course superintendents in Florida have reported that the turf health is no longer as great, and nematode responses to fluopyram have decreased. The objective of this research was to determine if the mechanism of the reported reduced efficacy was attributable to either: i ) enhanced degradation accelerating its breakdown in the soil, or ii ) reduced sensitivity to the nematicide in the nematode populations. In a field experiment, soil and nematodes were collected from small plots that had been treated multiple times over four years, for only one year, or never treated. Soil and nematodes were additionally collected from commercial turf sites where either multiple applications of fluopyram had been made for numerous years, or it had never been used. Bioassay experiments found no evidence of enhanced degradation. However, M. graminis collected from small field plots and commercial sites with long-term use of fluopyram were less sensitive to fluopyram in-vitro than those from small plots and commercial sites where fluopyram had not been used. These results indicate that nematicide resistance is a likely cause of reduced fluopyram efficacy on golf-course turf in Florida.","PeriodicalId":16475,"journal":{"name":"Journal of nematology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135201200","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of Soil Temperature on Reproduction of Root-knot Nematodes in Flue-cured Tobacco with Homozygous Rk1 and/or Rk2 Resistance Genes. 土壤温度对Rk1和/或Rk2抗性基因纯合子烤烟根结线虫繁殖的影响
IF 1.3 4区 生物学
Journal of nematology Pub Date : 2023-02-01 DOI: 10.2478/jofnem-2023-0032
Jill R Pollok, Charles S Johnson, J D Eisenback, T David Reed, Noah Adamo
{"title":"Effect of Soil Temperature on Reproduction of Root-knot Nematodes in Flue-cured Tobacco with Homozygous <i>Rk1</i> and/or <i>Rk2</i> Resistance Genes.","authors":"Jill R Pollok,&nbsp;Charles S Johnson,&nbsp;J D Eisenback,&nbsp;T David Reed,&nbsp;Noah Adamo","doi":"10.2478/jofnem-2023-0032","DOIUrl":"https://doi.org/10.2478/jofnem-2023-0032","url":null,"abstract":"<p><p>Most commercial flue-cured tobacco cultivars contain the <i>Rk1</i> resistance gene, which provides resistance to races 1 and 3 of <i>Meloidogyne incognita</i> and race 1 of <i>M. arenaria</i>. A number of cultivars now possess a second root-knot resistance gene, <i>Rk2</i>. High soil temperatures have been associated with a breakdown of root-knot resistance genes in a number of crops. Three greenhouse trials were performed from 2014 to 2015 investigate the effect of high soil temperature on the efficacy of <i>Rk1</i> and/or <i>Rk2</i> genes in reducing parasitism by a population of <i>M. incognita</i> race 3. Trials were arranged in randomized complete block design in open-top growth chambers set at 25°, 30°, and 35°C. Plants were inoculated with 3,000 eggs and data were collected 35 days post-inoculation. Galling, numbers of egg masses and eggs, and reproductive index were compared across cultivar entries. Nematode reproduction was reduced at 25°C and 30°C on entries possessing <i>Rk1</i> and <i>Rk1Rk2</i> compared to the susceptible entry and the entry possessing only <i>Rk2</i>. However, there were often no significant differences in reproduction at 35°C between entries with <i>Rk1</i> and/or <i>Rk2</i> compared to the susceptible control, indicating an increase of root-knot nematode parasitism on resistant entries at higher temperatures. Although seasonal differences in nematode reproduction were observed among experiments, relative differences among tobacco genotypes remained generally consistent.</p>","PeriodicalId":16475,"journal":{"name":"Journal of nematology","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10390847/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10603235","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Evaluation of fumigant and non-fumigant nematicides for management of Rotylenchulus reniformis on sweetpotato. 评估熏蒸剂和非熏蒸剂杀线虫剂对甘薯上轮枝菌(Rotylenchulus reniformis)的管理效果。
IF 1.3 4区 生物学
Journal of nematology Pub Date : 2023-01-24 eCollection Date: 2023-02-01 DOI: 10.2478/jofnem-2023-0061
Tristan T Watson, Caleb S Hamm, J Cole Gregorie
{"title":"Evaluation of fumigant and non-fumigant nematicides for management of <i>Rotylenchulus reniformis</i> on sweetpotato.","authors":"Tristan T Watson, Caleb S Hamm, J Cole Gregorie","doi":"10.2478/jofnem-2023-0061","DOIUrl":"10.2478/jofnem-2023-0061","url":null,"abstract":"<p><p>Reniform nematode (<i>Rotylenchulus reniformis</i>) 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. A similar trend was observed with fluopyram (56 - 67% reduction) and aldicarb (63 - 65% reduction), which provided season-long suppression of reniform nematode population development in 2021 but had no impact in 2022. In 2021, nematicide application had no impact on yield; however, in 2022, oxamyl and aldicarb increased the yield of U.S.#1 grade sweetpotato. Overall, soil fumigation with 1,3-dichloropropene and in-furrow application of fluopyram and aldicarb provided the most consistent suppression of reniform nematode on sweetpotato.</p>","PeriodicalId":16475,"journal":{"name":"Journal of nematology","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2023-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10817821/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139570695","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Integrated Management of Meloidogyne Incognita and Soilborne Fungi Infecting Cucumber Under Protected Cultivation. 防护栽培黄瓜褐裂丝虫病与土传真菌的综合治理。
IF 1.3 4区 生物学
Journal of nematology Pub Date : 2022-11-20 eCollection Date: 2022-02-01 DOI: 10.2478/jofnem-2022-0042
J A Patil, Saroj Yadav, Sewak Ram, Anil Kumar, Satish Kumar
{"title":"Integrated Management of <i>Meloidogyne Incognita</i> and Soilborne Fungi Infecting Cucumber Under Protected Cultivation.","authors":"J A Patil,&nbsp;Saroj Yadav,&nbsp;Sewak Ram,&nbsp;Anil Kumar,&nbsp;Satish Kumar","doi":"10.2478/jofnem-2022-0042","DOIUrl":"https://doi.org/10.2478/jofnem-2022-0042","url":null,"abstract":"<p><p>Relative efficacy of various approaches for management of <i>Meloidogyne incognita</i> and the soilborne fungus <i>Fusarium oxysporum</i> f. sp. <i>cucumerinum</i> has been tested in cucumber under protected cultivation conditions for two seasons. Management practices, namely, chemicals (fumigant, nonfumigant, and fungicide), organic amendments (neem cake, leaves, and oil opted as soil and seed treatment), and biocontrol agents (egg-parasitic fungus and <i>Purpureocillium lilacinum</i>), were combined for the management of the disease complex in a randomized block design. Two significant parameters were measured: plant growth parameters (shoot length, dry shoot weight, dry root weight, and yield) and disease parameters (galls per plant, final nematode population, egg masses per plant, and fungal incidence). All treatments significantly improved plant growth parameters and reduced nematode reproduction as compared to untreated check. The integration of formalin and neem oil seed treatment favors the low root galling index compared to all other treatments in both the seasons. Formalin and neem oil seed treatment reduced the nematode population and fungal incidence, and increased the yield of cucumber during both the seasons.</p>","PeriodicalId":16475,"journal":{"name":"Journal of nematology","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2022-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9676669/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40457553","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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