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Abstract

Experiment was conducted at Regional agricultural research station, Pattambi during the second crop (rabi) season of 2019-2020, 2020-2021 and 2021-2022 to evaluate the effect of four different modules viz., (T1 Botanical insecticide module I): neemazal 1 % @ 2 ml/l (25-30 DAT), eucalyptus oil @ 2 ml/l (45-50 DAT), cartaphydrochloride 50 % SP @ 2 g/l (60-65 DAT), (T2- Botanical insecticide module II)- neemazal 1 % @ 2 ml/lit (25-30 DAT), neem oil @ 2 ml/lit (45-50 DAT), triflumezopyrim @ 0.48 ml/l (60-65 DAT), (T3-Botanical module)- neemazal 1 % @ 2 ml/l (25-30 DAT), eucalyptus oil @ 2 ml/l (45-50 DAT), neem oil @ 2 ml/l (60-65 DAT), (T4-Insecticide module Chlorantraniliprole 0.4 G @ 1 g/m2 (25-30 DAT), Cartaphydrochloride 50 % SP @ 2 g/l (45-50 DAT), Triflumezopyrim @ 0.48 ml/l (60-65 DAT) with an untreated control against major lepidopteran rice pests. The pooled analysis showed that the lowest damage of stem borer was observed in T4 (Insecticide module) with an average mean percentage incidence of dead heart was 6.03 per cent at 30 DAT and 50 DAT which was 53.09 per cent less over control while incidence of white ear head was also low with 32.04 per cent over control. The leaf folder damage was also significantly reduced with an average damage of 5.37 per cent with a reduction of 50.91 per cent over control at 50 DAT and 75 DAT. Increase in grain yield over control in the module was significantly higher with 78.17 per cent increase over control.