Effect of variable temperature on the toxicity of novel insecticides against diamondback moth, Plutella xylostella (Linn.)
N Teja, V Sunitha, V Ramesh Babu and J Satyanarayana
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.
N Teja, V Sunitha, V Ramesh Babu, J Satyanarayana. Effect of variable temperature on the toxicity of novel insecticides against diamondback moth, Plutella xylostella (Linn.) . J Entomol Zool Stud 2018;6(5):409-412.