Evaluation of Botanical - Insecticide modules against stem borer, brown planthopper and natural enemies in rice

Abstract

Field experiment was conducted at Regional Agricultural Research Station, Maruteru, West Godavari (A.P.) during fourrabi seasons of 2019-20to 2022-23 to evaluate botanical-insecticide modules against stem borer and brown planthopper. Significantly superior results were recorded in insecticides alone module, T4 (Chlorantraniliprole 0.4 G @ 1.0 g m-2, Cartap hydrochloride 50% SC @ 2.0 g l-1, Triflumezopyrim 10% SC @ 0.48 ml l-1 applied at 25, 45 and 60 DAT respectively) with 50% ROC, 33% ROC in dead hearts and white ears, respectively in case of stem borer and 94% ROC in brown planthopper population and registered the highest grain yield.Among botanical – insecticide modules, treatment, T2 (Azadirachtin 10000 ppm @ 2.0 ml l-1, Neem oil @ 10.0 ml l-1 and Triflumezopyrim 10% SC @ 0.48 ml l-1 applied at 25, 45 and 60 DAT respectively) is the best against stem borer (26% ROC in dead heart damage & 13% ROC in white ear damage) and brown planthopper (91% ROC in brown planthopper population). Further, T2 is at par with insecticides alone module (T4) in managing stem borer and BPH and recorded the grain yield (6718 kg ha-1) on par with the insecticides alone module (6824 kg ha-1).