Effect of Biopesticides and Pheromone Traps on Major Insect-Pests and Their Natural Enemies of Cabbage

Aims: This study is aimed to know the effect of biopesticides on insect pests, predators and yield cabbage.
 Study Design: The experiment was laid out at a randomized complete block design with four replications.
 Place Duration Study: Central farm Sher-e-Bangla Agricultural University, Bangladesh during period from October 2018 March 2019.
 Methodology: conducted six treatments viz. T1= Spinosad @25 ml/ha 7 days interval , T2= SNPV (Spodoptera litura nuclear polyhedrosis virus) @ 2.47/ha 7days interval, T3= Spodolure trap 1/6 plot 14 T4= + spray, T5= spray T6= untreated control.
 Results: lowest infested leaves per five plants by flea beetle (0.33), tobacco cutworm semi- looper diamondback moth (1.33), aphid (7.50), found in treatment (Spodolure Spinosad).The population natural enemies also recorded highest lady bird (8.00) spider (8.60) observed as compared control. percentage healthy (91.67), maximum weight cabbge head plant-1 (1.20 kg), marketable cabbage plot-1 (19.48 kg) (45.08 t ha-1) treatment.
 Conclusion: It concluded that combination may be effective practice for management pests.