Diviion of Nematology, Indian Agriculture Research Institute, New Delhi-110 012.
*Paper presented at the National Symposium of “Recent Approaches in Integrated Nematode Management of Agricultural Crops” held at Hisar, India from 6-7th August 1993.
The effect of two organic amendments, mustard and neem oilcakes in an interaction involving a vesicular-arbuscular mycorrhizal fungus, Glomus fasciculatum (Gf) and a plant parasitic nematode, Rotylenchulus reniformis (Rr) on cowpea was investigated in a greenhouse study with a view to know the fate of Gf in oilcake-amended soils. Mustard oilcake + Gf amendment resulted in high growth responses in presence of the nematode. Mycorrhizal plants grown in oilcake-amended and inoculated with Rr produced as many spore counts as those of Gf-alone plants. Also, nematode egg numbers/gram of root were least on such plants. More actinomycetes were estimated to be present in oilcake-amended + Rr inoculated mycorrhizal soils.
Vesicular-arbuscular mycorrhiza, reniform nematode, cowpea, organic matter, oilcakes
