Evaluation of insecticides against lepidopterous pod borers on Pigeonpea

Observations on lepidopterous borers (LPB) viz., Lampides boeticus, Exelastis atomosa, Helicoverpa armigera and Maruca vitrata were recorded in the field of long duration pigeon pea cv Bahar. Treatment with the Thiacloprid 240 SC @ 75 g a.i./ha. was found to be effective against lepidopterous borers, which was followed by Imidacloprid 17.8 SL @ 20 g a.i./ha and Acetamiprid 20 SP @ 20 g a.i./ha. Under the influence of various insecticide treatments the grain yield was in the order of Dimethoate 30 EC @ 30 g a.i./ha (9.53 q/ha) < Fipronil 25 EC @ 8 g a.i./ha (10.66 q/ha) < Acetamiprid 20 SP @ 20g a.i./ha (11.77 q/ha) < Imidacloprid 17.8 SL @ 20 g a.i./ha (12.00 q/ha) < Thiomethoxam 25 WG @ 75 a.i./ha (12.93 q/ha) < Thiacloprid 240 SC @ 75 g a.i./ha (13.88 q/ha).