Vol. 12, Issue 9 (2023)

Author(s):
Anil Kumar ST, Moulya MR, K Srinivas and RS Meena

Abstract:
Brown plant hopper is one of the major pests of rice which is presently controlled by various insecticides. The present investigation was aimed to study the effectiveness of newer insecticidal formulations against rice brown plant hopper. After 1^st insecticidal spray Acephate + Imidacloprid 50% +1.8% SP shows superior over the other treatments with lowest number of pests (7.12), followed by Flubendiamide 480 SC (7.85), Chlorfenapyr 2 SC (8.88), Thiacloprid 240 SC (9.25), Spinosad 45 SC (9.44), Fipronil 5 SC (9.51), Emamectin benzoate 5 SG (9.91%), Chlorpyriphos + Cypermethrin 50%+ 5% EC (10.19), which is least effective against the rice brown plant hopper when compared to the other treatments, untreated check (14.99). After 2^nd insecticidal spray Acephate + Imidacloprid 50% +1.8% SP shows superior over the other treatments with lowest number of pests (6.08) followed by Acephate 75 SP (6.46), Flubendiamide 480 SC (6.63), Chlorfenapyr 2 SC (7.07), Thiacloprid 240 SC (7.17), Fipronil 5 SC (7.44), Spinosad 45 SC (7.54), Emamectin benzoate 5 SG (7.70) Chlorpyriphos + Cypermethrin 50% + 5% EC (8.2), which is least effective against the rice BPH when compared to the other treatments. While untreated check recorded highest incidence as there was no intervention with the insecticide spray.