Influence of Temperature Variation on Emamectin Benzoate Toxicity in Different Leucinodes orbonalis Guenee Populations of Punjab

In present study, larval populations of L. orbonalis, collected from different regions of Punjab i.e. Amritsar, Kapurthala, Malerkotla, Ludhiana were exposed to different concentrations of emamectin benzoate at 15, 20, 25 and 30°C for evaluation of LC₅₀ values. The LC₅₀ decreased from lower (15°C) to higher (30°C) temperature for all populations of L. orbonalis. The positive correlation was observed between the temperature coefficient and emamectin benzoate toxicity towards population of L. orbonalis, which increased with increase in temperature. The LC₅₀ values varied among different populations of L. orbonalis i.e. Amritsar populations with higher LC₅₀ followed by Kapurthala, Malerkotla and Ludhiana populations. The temperature and insecticide exposure history affected the toxicity of emamectin benzoate toxicity for L. orbonalis. The information would be helpful in developing management strategies for L. orbonalis according to prevailing environment conditions.