IF 0.5 4区生物学

Nematropica Pub Date : 2014-06-01 DOI: 10.31390/gradschool_theses.3340

M. T. Kularathna, C. Overstreet, E. Mcgawley, D. Xavier, C. M. Martín

{"title":"Influence of soil nutrients on reproduction and pathogenicity of Rotylenchulus reniformis on cotton","authors":"M. T. Kularathna, C. Overstreet, E. Mcgawley, D. Xavier, C. M. Martín","doi":"10.31390/gradschool_theses.3340","DOIUrl":"https://doi.org/10.31390/gradschool_theses.3340","url":null,"abstract":"Greenhouse and field studies were conducted to evaluate the effect of soil nutrients on reniform nematode ( Rotylenchulus reniformis ) reproduction and pathogenicity on cotton ( Gossypium hirsutum ). Initial greenhouse studies examined phosphorus (P) and potassium (K) at very low (10 or 44 mg kg-1) and high (50 or 123 mg kg-1) levels, respectively. Phosphorus produced significant increases in plant height and shoot and root dry weights as well as significant reductions in numbers of nematodes in soil and eggs from roots. Subsequent greenhouse studies evaluated increasing levels of P (10, 20, 35, 60, and 73 mg kg-1), K (44, 70, 106, 123, and 153 mg kg-1), and sulfur (S) at 3, 12, 20, 40, and 50 mg kg-1on cotton growth and nematode reproduction. Phosphorus significantly increased plant height at 15 and 30 d and shoot and root weights at 60 d. Potassium and S had no effect on plant growth with the exception of the highest level of S, which significantly reduced plant height and shoot dry weights. Overall, as P level increased, reproduction of the reniform nematode decreased. Potassium and S, irrespective of level, had no effect on densities of eggs or soil stages of the nematode. Field trials with cotton included combinations of P at 44.8 or 112 kg ha-1and S at 5.6 or 22.4 kg ha-1with or without 1, 3-dichloropropene at 28.1 L ha-1. Nematicide application significantly reduced nematode population density at mid-season and harvest in 2011 and at planting in 2012. In both 2011 and 2012, management of soil nutrients did not significantly influence nematode reproduction. In both years, seed cotton yield was significantly increased with nematicide, but not with supplemental nutrients.","PeriodicalId":19464,"journal":{"name":"Nematropica","volume":"44 1","pages":"15-24"},"PeriodicalIF":0.5,"publicationDate":"2014-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69690974","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: 5

DISTRIBUTION AND MOLECULAR IDENTIFICATION OF ROOT LESION NEMATODES IN TEMPERATE FRUIT ORCHARDS OF TURKEY 土耳其温带果园根损线虫的分布及分子鉴定

IF 0.5 4区生物学

Nematropica Pub Date : 2011-06-01 DOI: 10.5072/ZENODO.31846

M. Sogut, Z. Devran

{"title":"DISTRIBUTION AND MOLECULAR IDENTIFICATION OF ROOT LESION NEMATODES IN TEMPERATE FRUIT ORCHARDS OF TURKEY","authors":"M. Sogut, Z. Devran","doi":"10.5072/ZENODO.31846","DOIUrl":"https://doi.org/10.5072/ZENODO.31846","url":null,"abstract":"Sogut, M.A. and Devran, Z., 2011. Distribution and Molecular Identification of Root Lesion Nematodes in Temperate Fruit Orchards of Turkey. Nematropica 41:91-99. Root lesion nematodes are important migratory endoparasitic nematodes attacking temperate fruits in the West Mediterranean region of Turkey. A rapid and accurate method to identify Pratylenchus to the species level is necessary to develop management strategies. Seventy-eight populations of the root lesion nematode were collected from the temperate fruit production region in Turkey, including fruit orchards in Isparta and Antalya provinces. Species-specific primers and rDNA primers were used to identify Pratylenchus spp. Distribution ratios of the sampled root lesion nematode populations were 50%, 45%, 2.5% and 2.5% for P. thornei, P. neglectus, P. penetrans, and P. crenatus, respectively. The present study indicated that P. thornei and P. neglectus were widespread on temperate fruits in the West Mediterranean region of Turkey. Sogut, M.A. and Devran, Z., 2011. Distribucion e Identificacion Molecular de Pratylenchus en frutales de Turquia. Nematropica 41:91-99. Los nematodos lesionadores son endoparasitos migratorios de importancia que atacan los frutales de clima templado en la region Mediterranea Occidental de Turquia. Se requiere un metodo confiable y rapido para identificar las species de Pratylenchus que permita desarrollar estrategias de manejo. Se colectaron 78 poblaciones de Pratylenchus de la region productora de frutas en Turquia, incluyendo muestras de frutales en las provincias de Isparta y Antalya. Se utilizaron cebadores especificos de especie y las regiones de rDNA para identificar las species de Pratylenchus. La distribucion de frecuencia de especies hallada en las poblaciones fue de 50%, 45%, 2.5% y 2.5% para P. thornei, P. neglectus, P. penetrans y P. crenatus, respectivamente. Este estudio indica que P. thornei y P. neglectus se encuentran ampliamente distribuidas en frutales de clima templado en la region Mediterranea Occidental de Turquia.","PeriodicalId":19464,"journal":{"name":"Nematropica","volume":"41 1","pages":"91-99"},"PeriodicalIF":0.5,"publicationDate":"2011-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70790315","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: 15

The influence of morningglory (Ipomoea lacunosa), hemp sesbania (Sesbania exaltata), and johnsongrass (Sorghum halepense) on reproduction of Rotylenchulus reniformis on cotton Gossypium hirsutum L. and soybean Glycine max. (L.) merrill 研究了牵牛花(Ipomoea lacunosa)、大田麻(sesbania exaltata)和强johngrass (Sorghum halepense)对棉花、棉花和大豆上小轮虫繁殖的影响。美林(l)

IF 0.5 4区生物学

Nematropica Pub Date : 2007-12-01 DOI: 10.31390/gradschool_dissertations.3583

M. Pontif, E. Mcgawley

{"title":"The influence of morningglory (Ipomoea lacunosa), hemp sesbania (Sesbania exaltata), and johnsongrass (Sorghum halepense) on reproduction of Rotylenchulus reniformis on cotton Gossypium hirsutum L. and soybean Glycine max. (L.) merrill","authors":"M. Pontif, E. Mcgawley","doi":"10.31390/gradschool_dissertations.3583","DOIUrl":"https://doi.org/10.31390/gradschool_dissertations.3583","url":null,"abstract":"Pontif, M. J. and E. C. McGawley. 2007. The Influence of Morningglory (Ipomoea lacunosa), Hemp Sesbania (Sesbania exaltata) and Johnsongrass (Sorghum halepense) on Reproduction of Rotylenchulus reniformis on Cotton (Gossypium hirsutum) and Soybean (Glycine max). Nematropica 37: 295-305. Reniform nematodes that parasitize cotton and soybean can also reproduce on a wide spectrum of weed species, thereby maintaining nematode populations during the off-season. Microplot studies were conducted to evaluate the effects of three endemic weed species, morningglory (Ipomoea lacunosa), hemp sesbania (Sesbania exaltata), and johnsongrass (Sorghum halepense), on reproduction of the reniform nematode, Rotylenchulus reniformis on cotton (LA. 887) and soybean (Pioneer 96B21). Over two years of microplot trials, the co-culture of cotton with any of the three weed species suppressed numbers of reniform nematode juveniles in soil significantly. When grown singly, reproductive values of R. reniformis after 60 days on cotton averaged 69.0, while those for morningglory, hemp sesbania, and johnsongrass averaged 42.0, 23.5, and 18.0, respectively. Reproductive values on cotton co-cultured with morningglory averaged 38.5. Those for the cotton-hemp sesbania and cotton-johnsongrass combinations averaged 23.5 and 26.0, respectively. Nematode reproduction on soybean alone, and co-cultured with each of the three weeds, reduced reproduction of reniform nematode only in the presence of johnsongrass in two trials. Data from two subsequent 45-day duration greenhouse experiments conducted with cotton and leachates from each of the three weed species support the hypothesis that suppression of reniform nematode reproduction likely resulted from the secretion of allelopathic compounds by weed roots.","PeriodicalId":19464,"journal":{"name":"Nematropica","volume":"37 1","pages":"295-306"},"PeriodicalIF":0.5,"publicationDate":"2007-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69690249","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: 4

SCREENING FOR ROOT-KNOT NEMATODE RESPONSE IN SOMACLONAL VARIANTS OF SOLANUM QUITOENSE LAM. 龙葵体细胞无性系变异根结线虫反应的筛选。

IF 0.5 4区生物学

Nematropica Pub Date : 1996-08-01 DOI: 10.21273/HORTSCI.31.4.632A

L. Santamaría, R. Mulrooney, S. Kitto

{"title":"SCREENING FOR ROOT-KNOT NEMATODE RESPONSE IN SOMACLONAL VARIANTS OF SOLANUM QUITOENSE LAM.","authors":"L. Santamaría, R. Mulrooney, S. Kitto","doi":"10.21273/HORTSCI.31.4.632A","DOIUrl":"https://doi.org/10.21273/HORTSCI.31.4.632A","url":null,"abstract":"Solanum quitoense, a perennial herbaceous plant native to the tropical regions of Ecuador and Colombia, is susceptible to root-knot nematode, Meloidogyne incognita (Kofoid & White) Chitwood. The objectives of this study were to develop protocols for screening regenerants of S. quitoense for response to root-knot nematode. Internodal stem segments cultured on MS medium supplemented with BA (4.4 to 44 µ M) were the most regenerative explants. Growth regulators were not required to proliferate, root and reestablish S. quitoense. Sterile cultures of M.incognita were initiated and maintained on S. quitoense root cultures. Root-knot nematode response for the regenerants was evaluated by screening greenhouse- and in vitro-rooted microcuttings. Screening in the greenhouse of 248 regenerants of S. quitoense 'Dulce' inoculated with 1,000 eggs of M. incognita resulted in 21 regenerants having five or fewer galls. Further screening of these 21 regenerants in the greenhouse determined that nine had greater fresh weights and one regenerant produced more eggs per plant when compared to the susceptible control. Reproductive factor (Rf) values and Host Resistance Classification (HRC) percentages suggest that five regenerants had reduced nematode reproduction.","PeriodicalId":19464,"journal":{"name":"Nematropica","volume":"34 1","pages":"73-82"},"PeriodicalIF":0.5,"publicationDate":"1996-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67968997","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: 1

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