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 ...

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...

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...

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...

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 ...

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 ...