author(s)
N Teja, V Sunitha, V Ramesh Babu and J Satyanarayana

abstract
Ecotoxicity at four different temperature levels were studied with diversified novel insecticides viz., emamectin benzoate, chlorantraniliprole, chlorfenapyr, fipronil and flubendiamide against diamondback moth, Plutella xylostella. The toxicity of emamectin benzoate, chlorantraniliprole, chlorfenapyr, fipronil and flubendiamide were found to be positively correlated with the temperature range tested. Based on LC₅₀ values deduced, the toxicity of emamectin benzoate increased significantly by -1.29 and -1.23 folds at temperatures of 30 ^oC and 35 ^oC as compared with toxicity at 20 and 25 ^oC. Similarly, toxicity of chlorantraniliprole, chlorfenapyr, fipronil and flubendiamide increased by -1.71, -1.48, -1.74 and -1.50 folds respectively at 30 ^oC as compared with toxicity at 20 ^oC and 25 ^oC. All the insecticides showed overall positive temperature coefficients of 1.50, 2.35, 1.58, 2.45 and 2.17 fold respectively for the temperature range tested.