Efficacy of Some New Insecticides against Diamond Back Moth (Plutella xylostella L.) of Cauliflower and Cabbage.

The experiment was conducted on Efficacy of some new insecticides such as fipronil 5 SC(0.01%), spinosad 45 SC (0.009%), acetamiprid 20 SP (0.004%), dimethoate 30 EC (0.03%), clothianidin 50 WDG (0.01%), Bt (Biolep) (1%), imidocloprid 17.8 SL (0.004%), endosulfan 35 EC (0.07%), thiamethoxam 25 WG (0.005%) against DBM, (P. xylostella) of Cauliflower and cabbage. Among the insecticides, Spinosad @ 0.009% and Bt @ 1%, spray were proved to be very effective against P. xylostella after 7 days of 1^st spraying on cauliflower and cabbage which provided 79.17 and 76.39 and 78.98 and 77.53, per cent reduction over control, respectively. After 15 days of 1^st spraying on cauliflower and cabbage, spinosad @ 0.009% and fipronil @ 0.01% per cent were effective as 72.77 and 71.72 and 73.03, 70.22 per cent reduction in larvae of DBM. During Second spray on cauliflower and cabbage spraying of spinosad @ 0.009%, Bt @ 1% and fipronil @ 0.01% gave 73.19, 71.06 and 70.63 and 73.89, 73.45 and 72.56 per cent reduction in larval population of DBM, respectively. After 15 days of 2^nd spraying on cauliflower and cabbage, spinosad @ 0.009%, Bt @ 1% and fipronil @ 0.01% were effective treatments with 71.0, 69.51 and 68.77 and 70.57, 70.13, 69.02, per cent reduction over control, respectively.