BIO-EFFICACY OF SOME NEW CHEMISTRY INSECTICIDES AGAINST SUGARCANE TOP BORER, SCIRPOPHAGA NIVELLA (FABRICIUS) UNDER FIELD CONDITIONS

Abstract

The present research work was conducted to evaluate the toxic potential of chlorantraniliprole 0.4% G, chlorantraniliprole + thiamethoxam 0.6% G, chlorantraniliprole 20% SC, fipronil 0.3% G and carbofuran 3 G against sugarcane top borer, Scirpophaga nivella. Current study was carried out in 2018-19 at Research Farm of Sugarcane Research Institute, Ayub Agricultural Research Institute, Faisalabad, Pakistan. The insecticides were applied at dose rates of 4 kg/ acre (chlorantraniliprole 0.4% G), 8 kg/acre (chlorantraniliprole + thiamethoxam), 100 ml/acre (chlorantraniliprole 20% SC), 8 kg/acre (benfuracarb) and 9 kg/acre (carbofuran). Data regarding insect pest infestation were noted as percentage dead hearts. The results revealed that highest average damage percentage was found in untreated plot, i.e. 40.53%. Chlorantraniliprole 0.4% G was found better among all with 3.40% dead hearts after 30 days. Chlorantraniliprole 20% SC was the next effective one with 3.67% dead hearts followed by chlorantraniliprole + thiamethoxam 0.6% G (3.89%) whereas increased in dead hearts percentage (13.45-20.45%) and (12.10-19.45%) was recorded in fipronil 0.3% G and carbofuran 3% G, respectively after 30 days exposure period. Results regarding relative contents of different qualitative parameters in the attacked sugarcane variety disclosed that relatively higher sucrose contents i.e. 26.105 and 25.56% were sustained in chlorantraniliprole 0.4% G and chlorantraniliprole 20% SC, respectively whereas relatively lower contents were noted in sugarcane blocks treated with other insecticides. Quantitative characteristics of canes treated with chlorantraniliprole 0.4% G and chlorantraniliprole 20% SC were improved over the control. Overall outcomes disclosed that these two insecticides can be more useful for the control of sugarcane top borer compared to other insecticides.