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Integrated Management of Pigeonpea Wilt by Biotic Agents and Biopesticides Singh S.K., Singh R.H., Dutta S. Division of Plant Pathology, I.A.R.I., New Delhi 110 012, India Abstract Two isolates of Trichoderma viride-l and 2 and one each of Trichoderma harzianum, Gliocladium virens, Chaetomium globosum and Bacillus subtilis were used as biotic agents against Fusarium udum, the causal agent of pigeonpea wilt, Bio-agents tested in vitro by dual culture method, were found antagonistic to F. udum. A maximum inhibition in growth of F. udum (38.3%) was reported by T viride-l followed by T. viride-2 (35.3%) whereas C. globosum was found least effective. Neem product amritguard (200 ppm), inhibited growth of the host pathogen by 69.2% in vitro. Soil application of T viride-l reduced wilt incidence by 31.1% while a combination of antagonist T. viride-l and amritguard provided 28.4% control at 60 days after sowing in pots. Seed treatment with amritguard alone was not found effective for the control of pigeonpea wilt. Top Key words Bioagents, Fusarium udum, Neem oil, Pigeonpea. Top | | |
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