Evaluation of sequences of insecticides, biopesticides and bioagents against major insect pests of okra

Treatment, T3 (Acetamiprid+ B. bassiana+ Spinosad+ Destruction of infested shoots and fruits)(1.51/ three leaves) and T8 (dimethoate/ malathion) emerged as best sequences in reducing the leaf hopper population, these treatments were statistically at par. The treatments T3, T8 and T4 resulted in low population of whitefly (1.85 to 2.20 whiteflies/ three leaves) which were most effective and at par with each other. The treatments T2, T4, T6 and T7 proved most effective against shoot and fruit borer and resulted in 1.38, 1.57, 2.69 and 2.91 percent shoot damage, respectively. The data on fruit damage exhibited that sequences T2 and T4 formed best effective group of treatments (2.26 to 2.64% fruit damage) and had non-significant difference among them. The maximum benefit cost ratio of 48.44 was obtained in the sequence T8 followed by T6 (29.02) and T4 (27.76), while the minimum was in T5 (1.27) followed by T7 (1.47).