Bioefficacy of different insecticides on pink bollworm against Bt cotton

S. RAKHESH; S. G. HANCHINAL; J. M. NIDAGUNDI; J. S. VIJAYKUMAR

S. RAKHESH Department of Agricultural Entomology, University of Agricultural Sciences, Raichur - 584 104, India
S. G. HANCHINAL Department of Agricultural Entomology, University of Agricultural Sciences, Raichur - 584 104, India
J. M. NIDAGUNDI Department of Genetics and Plant Breeding, University of Agricultural Sciences, Raichur - 584 104, India
J. S. VIJAYKUMAR Department of Agronomy College of Agriculture, University of Agricultural Sciences, Raichur - 584 104, India

Keywords: Bioefficacy, Bt-cotton, Cost economics, Insecticides, Pink bollworm, Yield

Abstract

The field trial for evaluation of various against cotton pink bollworm was conducted at Main Agricultural Research Station (MARS), Raichur during 2020-21. Among all the treatments, Chlorantraniliprole 18.5 SC (150 ml/ha) sprayed plots showed significant reductions in pink bollworm larval incidence and green boll damage of 74.32 and 77.34 per cent over the untreated control, respectively. Similarly, highest seed cotton yield (16.86 q/ha) was recorded in the Chlorantraniliprole 18.5 SC sprayed plots with highest net returns (35327 `/ha) and B: C ratio of 1.47 followed by Emamectin benzoate sprayed plots with net returns of 26208 `/ha and B: C ratio of 1.42. Overall, Chlorantraniliprole 18.5 SC followed by Emamectin benzoate 5 SG demonstrated effective pest control and emerged as the most economically viable option, considering its higher net returns and better B:C ratio. Hence present findings are helpful for decision making while managing pink bollworm with insecticides.