Management of Carrot Root Borer, Melanagromyza sp. in Carrot Dacus carota L

Abstract

A field experiment was conducted during rabi/summer 2021-22 at Nagaral village of Ron taluka in Gadag district, Karnataka to identify the appropriate causal agent for carrot root damage and to assess the field efficiency of different insecticide molecules against agromyzid fly, Melanagromyza sp. The experiment was laid out in randomized block design with 11 treatments replicated thrice. The crop was cultivated during 1st January 2022 as per the recommended package of practices except the insect protection measures. Observation on per cent infestation by agromyzid fly was recorded in each treatment by adopting a destructive sample technique from 40 days after sowing to 100 days after sowing. Per cent damage and yield parameters were subjected to one-way ANOVA and Duncan’s Multiple Range Test. Result indicated that highest reduction of agromyzid fly damage over untreated control was recorded in treatment with soil application with chlorantraniliprole 0.4% GR @ 10 kg/ha at 35 DAS (71.86% reduction over control) and soil application with fipronil 0.3 % GR @ 20 kg/ha at 35 DAS with 69.10 per cent reduction over control. These are followed by seed treatment with cyantraniliprole 19.8% + thiamethoxam 19.8% @10 ml/kg, seed treatment with thiamethoxam 30 FS @ 10 ml/kg, seed treatment with imidacloprid 600 FS @ 10ml/kg and soil drenching with chlorpyriphos 20% EC @ 3 ml/l at 35 DAS, these treatments registered a maximum reduction of agromyzid fly viz., 69%, 58.03%, 56.79% and 58.03%, respectively.