Vol. 10, Special Issue 7 (2021)

Author(s):
K Shamili Dhatri, MSV Chalam, A Rajesh, B Ramana Murthy and NC Venkateswarlu

Abstract:
Efficacy of nine insecticides viz., thiamethoxam @ 0.4 g l^-1, thiacloprid @ 0.25 ml l^-1, flonicamid @ 0.4 g l^-1, pymetrozine @ 0.6 g l^-1, dinotefuran @ 0.3 g l^-1, spinosad @ 0.3 ml l^-1, imidacloprid @ 0.3 ml l^-1, acetamiprid+fipronil @ 2.0 ml l^-1 and fipronil @ 2 ml l^-1 against sucking insect pest complex viz., leafhoppers, aphids and thrips in groundnut crop was evaluated at field level and the results revealed that all the insecticides were effective when compared with the control in reducing the population of sucking insect pest complex of groundnut. After two rounds of sprays, acetamiprid+fipronil @ 2.0 ml l^-1 recorded significantly highest per cent reduction over control (73.58%) for sucking insect pest complex under study. The next effective treatments were, imidacloprid @ 0.3 ml l^-1 and pymetrozine @ 0.6 g l^-1 for leafhoppers and aphids and fipronil @ 2 ml l^-1 for thrips. Thiamethoxam @ 0.4 g l^-1, flonicamid @ 0.4 g l^-1 and dinotefuran @ 0.3 g l^-1 exhibited moderate efficacy against the sucking insect pest complex. The least effective treatments were spinosad @ 0.3 ml l^-1 and thiacloprid @ 0.25 ml l^-1.