New IPM module against stem rot and insect pests of jute (Corchorus olitorius L.)
Keywords:Integrated pest management, Apion, Corchorus olitorius, hairy caterpillar, indigo caterpillar, insect pests, jute, Macrophomina phaseolina, Semilooper, Stem rot, Yellow mite.
AbstractA new IPM module consisting of cultural (deep ploughing to expose soil to sun, sowing in line with 5 - 6 lakh plants /ha, NPK: 60 (30+15+15):30:30, manual hand weeding once at 21 DAS, variety: JRO 204 (Suren)); chemical (soil application of Ca(OCl)2 @ 30 kg/ha at 7 DBS, seed treatment (ST) with (a) carbendazim @ 2g/kg + (b) imidachloprid @ 4g/kg, application of pesticides: spiromecifen @ 1 ml/litre, profenophos @ 2 ml/litre) and biological (ST with Trichoderma viride @ 10g/kg, soil application of Pseudomonas fluorescens @ 100g/ sq. m before sowing and spraying of neem oil @ 3 - 4 ml/litre) components was tested against stem rot caused by Macrophomina phaseolina and yellow mite, semilooper, hairy caterpillar, apion and indigo caterpillar of jute (Corchorus olitorius L.) crop during 2015-20 at ICAR-CRIJAF, Barrackpore and farmersâ€™ field in four different villages in North 24 Parganas district of West Bengal. Stem rot was lowest (2.5%) in full IPM treatment with all components compared to 20% in actual farmersâ€™ practice. Similarly, yellow mite was reduced to 0.8%, semilooper to 0.4%, indigo caterpillar to 1%, apion 0.7%, hairy caterpillar 0.6% using IPM compared to 4-8% in farmersâ€™ practice. Higher fibre yield and benefit cost ratio of 31.5 q/ha and 1.78 were observed in full IPM module as compared to 14.7 q/ha and 1.4, respectively, in actual farmersâ€™ practice. As jute plants grow older, susceptibility to stem rot increases.
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