Efficacy of different IPM modules against major pests of cabbage

Abstract

Different IPM modules untreated control were evaluated against Diamond back moth, Plutella xylostella, cabbage butterfly, Pieris canidia, cutworm, Agrotis ipsilon and cabbage aphid, Brevicoryne brassicae. Among the modules, Module (M5) i.e. lamda-cyhalothrin @ 25g a.i. per ha contributed maximum effectiveness in reducing the population of various pests followed by Module (M1) consisting of 3 releases of Trichogramma chilonis @ 1 lakh/ha at 10 days interval + 3 releases of T. pieridis @ 1 lakh/ha at 10 days interval + one spray of Bt@ 2ml/lit at 15 days after release of Trichogramma + one spray of NSKE 5%. However, the highest population of coccinellids was achieved in the biopesticide treated plots compared to lamda-cyhalothrin treated plots. The highest marketable yield was recorded in Module (M5) (262.50 and 252.50 q/ha) with a cost benefit ratio of 2.28 and 2.62 which was followed by Module (M1) contributed the yield of 212.78 and 202.67 q/ha as against 114.89 and 96.11 q/ha in the untreated control plots with a cost benefit ratio of 1.79 and 2.03during 2013-14 and 2014-15, respectively. Though the maximum return was obtained from Module (M5) followed by Module (M1), considering the coccinellids population, it may be concluded that instead of use of chemical alone farmers can adopt the IPM module M1 for effective reduction of pests on cabbage.