Management of Dry Root Rot (Macrophomina phaseolina (Tassi.) (GOID) of Urd Bean (Vigna mungo (L.) Hepper) by the Integration of Antagonists (Trichoderma virens) and Organic Amendments

摘要

Bio-efficacy of native isolates of Trichoderma virens combined with farm yard manure were evaluated against dry root rot of urd bean incited by Macrophomina phaseolina under field condition. Seed treatment at 4 g/kg + soil application (on 0 and 30 days after sowing) at 100 g / m~2 of T. virens combined with FYM showed maximum reduction of dry root rot incidence, increased the rhizoshphere population of antagonists, inhibited the propagules of M. phaseolina and improved the maximum growth parameters of urd bean viz., root length, shoot length, number of pods plant~(-1), 100-seed weight, grain yield ha~(-1) and dry matter production. Application of T. virens along with soil application of FYM was most effective and significantly improved the plant growth, grain yield, dry matter production and reduced the disease incidence than application of T. virens alone.