Vol. 11, Issue 12 (2022)

Author(s):
NV Radadiya, KA Patel, NK Kavad and SJ Sindhi

Abstract:
Attack of shoot fly in sorghum causes considerable yield losses at initial growth stage of plant. Delay in insecticides application for control adds to high yield losses. Seed treatment is the easiest and economical method for timely management of shoot flies. Different seed dressing insecticide treatments thiamethoxam 30 FS @ 3 and 6 ml/kg seed, imidacloprid 70 WS @ 3 and 6 ml/kg seed, fipronil 5 SC @ 5 ml/kg seed, dimethoate 30 EC @ 4 ml/kg seed, acetamiprid 20 SP @ 3 gm/kg seed with one untreated control was evaluated against shoot fly. Overall pooled data of two seasons during Kharif, 2020 and Kharif, 2021 revealed that the there was significantly difference in shoot fly incidence among all the insecticidal treatments and all treatments shows their superiority against untreated control plot. Seed treatment with thiamethoxam 30 FS @ 6 ml/kg seed proved its efficacy during both seasons at different periods and found effective among all the insecticidal treatments and recorded overall significantly lower shoot fly incidence in terms of dead hearts as 8.26 per cent. Seed treatment with imidacloprid 70 WS @ 6 ml/kg seed (9.39%) also found effective during both the seasons of investigation and observed statistically at par effective treatment. As far as grain yield concerned, the grain yield was significantly superior in all insecticidal treatments over control. The seed treatment thiamethoxam 30 FS @ 6 ml/kg seed recorded highest grain yield (1470 kg/ha) which was statistically at par with seed treatment with imidacloprid 70 WS @ 6 ml/kg seed (1407 kg/ha). The best treatment also obtained highest ICBR ratio (1:39.48).