Pesticide Research Journal

Toxicity of different insecticides viz., endosulfan, cypermethrin, deltamethrin, chlorpyriphos, profenophos, thiodicarb and flubendiamide bioassayed against third instar larvae of spotted bollworm, E. vittella populations collected from different locations of Punjab. Based on the LD₅₀ values obtained for different insecticides, flubendiamide was found to be most toxic against all the pest populations with LD₅₀ values ranging from 0.004 to 0.010 μg larvae⁻¹ followed by profenophos except against Mansa population where toxicity of deltamethrin (0.018 μg larvae⁻¹) was more than profenophos (0.033 μg larvae⁻¹). Cypermethrin was found to be least effective against Mansa and Muktsar populations with LD₅₀ values 0.325 and 0.173 μg larvae⁻¹, respectively and endosulfan to Ludhiana population with LD₅₀ value (0.126 μg larvae⁻¹).