Bioefficacy of new insecticide molecules against sugarcane early shoot borer, Chilo infuscatellus (Snellen) (Pyralidae; Lepidoptera)

Abstract

An experiment was conducted at Regional Sugarcane and Jaggary Research Station, Kolhapur during 2015-16 to evaluate relative efficacy of new insecticide molecules against sugarcane early shoot borers Chilo infuscatellus (Snellen). Eight insecticides namely, Fipronil 0.3% GR, Chlorantraniliprole 0.4% GR,Chlorantraniliprole 18.5% SC, Fipronil 5% SC, Spinosad 45% SC, Flubendiamide M/M 39.35% SC, Phorate 10% CG, Carbofuran 3% CG were compared with untreated (Check plot). Significant differences were noticed among the treatments. All chemicals recorded significantly less cumulative incidence per cent against early shoot borer (8.20 to 27.36%); more average millable canes (74.19 to 97.22 thousand / ha) and cane yield 87.04 to 118.98 t /ha) as compared to untreated control (32.55%, 71.06 thousand / ha and 81.02 t/ha respectively). The soil application of chlorantraniliprole 0.4 GR at the time of planting and 60 days after planting followed by spraying of chlorantraniliprole 18.5% SC at 30 and 60 days after planting are statistically at par and recorded least early shoot borer incidence (8.20 and 11.60%), maximum average millable canes (97.22 and 94.56 thousand / ha) and cane yield (118.98 and 112.96 t/ha). The next best superior treatments found for reducing early shoot borer incidence were Fipronil 0.3% GR and Carbofuran 3% CG.