Biointensive management of collar rot, Aspergillus niger and stem rot, Sclerotium rolfsii Sacc. in groundnut, Arachis hypogaea L.

摘要

The effect of some plant extracts and bio protectants on the management of collar rot and stem rot of groundnut (Arachis hypogaea L.) was investigated by conducting an experiment under field conditions. Results indicated that, the Calotropis procera leaf extract 10ml/kg seed + Trichoderma viride 4g/kg seed gave significant control of collar rot and stem rot with increased yield after mancozeb seed treatment 3g/kg seed. The seed treatment with C. procera leaf extract and T.viride alone also gave significant control of collar rot and stem rot over control with increased yields. Seed treatment with neem products alone and in combination with T.viride gave lower yields than control (with out any treatment) because neem products hindered the growth of the plant initially and also could not control collar rot and stem rot. More over, these products also hindered the antagonistic effect of T.viride on collar rot and stem rot.