نتایج جستجو برای: Aphelenchoides

تعداد نتایج: 215  

Journal: :Journal of nematology 2007
Jamie L McCuiston Laura C Hudson Sergei A Subbotin Eric L Davis Colleen Y Warfield

A PCR-based diagnostic assay was developed for early detection and identification of Aphelenchoides fragariae directly in host plant tissues using the species-specific primers AFragFl and AFragRl that amplify a 169-bp fragment in the internal transcribed spacer (ITS1) region of ribosomal DNA. These species-specific primers did not amplify DNA from Aphelenchoides besseyi or Aphelenchoides ritzem...

Journal: :Journal of nematology 2012
G J Griffin J D Eisenback K Oldham

Previously we showed in laboratory studies that the fungivorus nematode, Aphelenchoides hylurgi, was attracted to and fed upon the chestnut blight fungus, Cryphonectria parasitica, from American chestnut bark cankers and was a carrier of biocontrol, white hypovirulent C. parasitica strains. In the present field study, we recovered Aphelenchoides spp. in almost all (97.0 %) of 133 blight canker ...

Journal: :Journal of nematology 1994
L H Self E C Bernard

Dogwood canker is a serious production problem of unknown etiology. From May 1985 through April 1989, cankers from 290 flowering dogwood trees in 15 separate nurseries were sampled for nematodes. Seventy-three percent (213) of the cankers contained nematodes. Panagrolaimus rigidus (Schneider) Thorne (115/290) and Aphelenchoides spp. (91/290) were the most frequently collected taxa. Panagrolaimu...

ابراهیم پورجم احمد خیری فرحناز جهانشاهی افشار

به منظور شناسایی فون نماتدهای راسته Tylenchida در باغات میوه منطقه جیرفت واقع در استان کرمان، طی سالهای 1380 و 1381، تعداد 140 نمونه خاک از اطراف ریشه درختان میوه منطقه جمع‌‌آوری گردید. پس از انتقال نمونه‌‌ها به آزمایشگاه، عملیات شستشوی خاک و استخراج نماتدها به روش سانتریفوژ و تثبیت و انتقال آنها به گلیسیرین با استفاده از روش دگریسه (1969) انجام گرفت. سپس از نماتدهای جدا شده به تفکیک جنس، اسلای...

Journal: :Zootaxa 2015
Alcides Sánchez-Monge Lorena Flores Luis Salazar Sue Hockland Wim Bert

Few Aphelenchoides spp. are facultative plant-parasites (foliar and bulb nematodes); three of them are well known in agricultural systems, namely Aphelenchoides besseyi, A. fragariae and A. ritzemabosi. Ten other plant-parasitic species, A. arachidis, A. bicaudatus, A. blastophthorus, A. dalianensis, A. ensete, A. nechaleos, A. paranechaleos, A. saprophilus, A. sphaerocephalus and A. subtenuis,...

Journal: :Journal of nematology 1986
R F Myers

1. Diab, K. A., and W. R. Jenkins. 1966. Three new species ofCriconemoides (Nematoda: Criconematidae). Proceedings of the Helminthological Society of Washington 33:5-7. 2. Hooper, D.J., and R. F. Myers. 1971. Aphelenchoides rutgersi n. sp. (Nematoda: Aphelenchoidea), description and morphometrics, with observations on A. dactylocercus Hooper, 1958 and A. cibolensis Riffle, 1970. Nematologica 17...

Journal: :Journal of microbiology and biotechnology 2018
Tae Gwan Kim Guy R Knudsen

Trophic interactions of introduced biocontrol fungi with soil animals can bea key determinant in the fungal proliferation and activity.This study investigated trophic interaction of an introduced biocontrol fungus with soil nematodes. The biocontrol fungusTrichoderma harzianum ThzID1-M3 and the fungivorous nematode Aphelenchoides sp. (10 per gram of soil) were added to nonsterile soil, and micr...

2005
H. L. TALWANA

Plant parasitic nematodes remain a major challenge to crop production that has hitherto received minmum research attention in sub-Saharan Africa. This paper gives the diversity of nematode genera and species associated with cereal crops and indicates the possibility of nemadode population build up due to production intensification especially in soils with high sand content. Twenty-two nematode ...

Journal: :Journal of nematology 1994
S K Ibrahim R N Perry P R Burrows D J Hooper

The polymerase chain reaction (PCR) was used to amplify a fragment of the ribosomal DNA (rDNA) from species and undescribed populations of Aphelenchoides and Ditylenchus angustus. The PCR primers used were based on conserved sequences in the 18S and 26S ribosomal RNA genes of Caenorhabditis elegans. In C. elegans, these primers amplify a 1,292 base pair (bp) fragment, which consists of the two ...

Journal: :Journal of nematology 1993
M Mor Y Spiegel

The widespread destruction of commercially grown bulbs of Narcissus tazetta papyraceus (Paper White) has been reported in Israel. This phenomenon is usually characterized by a premature yellowing of the foliage, accompanied by root rot and dark, sunken basal plates. This study confirmed thatAphelenchoides subtenuis is the main cause of the basal plate disease of Narcissus. In contrast to other ...

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