AGEMENT OF EARIAS VITTELLA AND PECTINOPHORA GOSSYPIELLA THROUGH DIFFERENT INSECTICIDES UNDER COTTON FIELD CONDITIONS

Abstract

The efficacy of five different insecticides was evaluated against bollworms under cotton cultivated crop during the Kharif season, 2021. The insecticides namely; T1= Triazophos 120ml, T2= Deltamethrin+Triazophos 100ml, T3= Cypermethrin 60ml, T4= Emamectin 50ml, T5= Abamectin 20ml/tank and T6= Control (water-washed) were applied and replicated two times on Hari Dsot cotton cultivar variety. The field experimental plot sizes were kept at 100ft, number of rows 100, row to row space 60cm, plant to plant space 25cm, and sprays were done in the early morning after 15 days interval basis. Through RCBD data of the pest population was gathered as pre-treatment and after 3rd, 7th, and 14th days of post-spray. After 1st spray at 1st replication, the abamectin found with more efficacy caused highest reduction (68.68%), followed by the combination of deltamethrin+triazophos (60.55%), cypermethrin (57.45%), emamectin (52.35%) and triazophos (48.65%), against Earias vittella, and after 2nd spray, at 2nd fortnight replication abamectin caused again highest larvae reduction (78.87%), followed by emamectin (60.35%), cypermethrin (54.25%), deltamethrin+triazophos (50.65%) and triazophos (47.55%). In the scheduled of 1st spray at 1st replication the abamectin caused the highest reduction (94.75%), followed by deltamethrin+triazophos (73.25%), cypermethrin (70.45%), triazophos (65.25%), and emamectin (62.45%), against Pectinophora gossypiella, hence; after 2nd spray at 2nd fortnight replication, the abamectin proved with high reduction again (97.15%), followed by cypermethrin (71.35%), deltamethrin+triazophos (63.65%) emamectin (60.75%), and triazophos (59.55%), respectively. After completion of two successive replicated sprays, it is concluded that the insecticide abamectin proved highest reduction % against both cotton borer species hence, recommended. Intensive attention to the enhancement of biological controlling agents and wise application of pesticides is the best solution for future endeavours.