Efficacy of chemical and botanical insecticides against sucking insect pest complex on Okra (Abelmoschus esculentus L. Moench)

Abstract

The present investigation was carried out to study the bioefficacy of some insecticides against sucking insect pest of okra during kharif season 2015 at the Vegetable research farm, JNKVV, Jabalpur, Madhya Pradesh. The treatments imidacloprid 17.8% SL (35.6 g a.i./ha) was found to be significantly effective against jassid Amrasca biguttula biguttula (Ishida), aphid Aphis gossypii Glover and whitefly Bemisia tabaci (Gennadius) as it recorded lowest population. The next effective treatments was difenthiuron 50 WP(300 g a.i./ha), followed by imidacloprid 17.8% SL @ 17.8 g a.i./ha and thiamethoxam 25% WG @ 25 g a.i./ha, but found at par to each other against all the sucking insect pest of okra. Whereas other insecticides emamectin benzoate 5% SG @ 12 g a.i./ha and emamectin benzoate 5% SG @ 10 g a.i./ha were the next group of better treatments. Treatment NSKE 5% @ 750 g a.i./ha although found least effective, but it was significantly superior to control.