Toxicity of Selected Insecticides against Cotton Mealybug (Phenacoccus solenopsis Tinsley) in Laboratory Bioassays

Investigations on susceptibility of insecticides in cotton mealybug (Phenacoccus solenopsis Tinsley) was carried out at Main Cotton Research Station, Navsari Agricultural University, Surat during October 2020 to January 2021 through the IRAC leaf dip bio-assay technique. Mealybug population from farmer’s field Bharuch district were collected and reared NAU, under cage cover. Leaf bio-assays for seven viz., imidacloprid 70 WG, acetamiprid 20 SP, thiamethoxam 25 buprofezin SC, lamda cyhalothrin 5 EC, spinosad 45 SC profenophos 50 EC with eight concentrations including control three repetitions. At recommended rate, 0.1% SP 0.004% recorded 83.50 80.77% mortality after 72 hours exposure. Buprofezin 0.05% 78.89 while 17.8 SL 0.00445% exhibited 67.70 WG 0.01% found show 65.91% laboratory bioassay