Journal of Advances in Biology & Biotechnology

Among the rice insect pests, gall midge, Orseolia oryzae (Wood-Mason) damage the crop during the early vegetative stage. The rice gall midge has been reported as the pest of rice from several Asian countries like Bangladesh, China, India, Indonesia, Myanmar, Nepal, Sri Lanka, Thailand and Vietnam. In India, it is a serious pest of irrigated and shallow water rice ecosystems. It has become imperative to evaluate newer molecules under specific geographic conditions to identify potential alternatives against rice gall midge. The study aimed to evaluate certain granular and foliar insecticides against rice gall midge, Orseolia oryzae (Wood-Mason). The study was conducted at Regional Agricultural Research Station, Warangal during rabi, 2020-21. Telangana sona was taken as a test cultivar during the course of research.

The selected insecticides for this study, viz., flubendiamide 0.7G, flubendiamide 20 WDG, cartap hydrochloride 4G, cartap hydrochloride 50 SP, chlorantraniliprole 0.4G, chlorantraniliprole 18.5 SC, fipronil 0.3G, fipronil 5 SC and carbofuran 3G (check insecticide) were evaluated against gall midge of rice. The insecticides were applied twice, i.e, granular formulations were applied either in the nursery or 25 DAT or both with spray formulations at 60 DAT (at panicle initiation to booting stage).

Among 14 treatments, fipronil 0.3G @ 1000 g/ha in nursery + 20 kg/ha at 25 DAT + 5 SC @ 1000 ml/ha at panicle initiation to booting stage (T₁₂) offered good control of gall midge (in terms of silver shoots incidence) with 82.77% reduction in incidence over control followed by carbofuran 3G @ 2000 g/ha in nursery + 25 kg/ha at 25 DAT (T₁₃) with 76.65% reduction, fipronil 0.3G @ 20 kg/ha at 25 DAT + 5 SC @ 1000 ml/ha at panicle initiation to booting stage (T₁₁), chlorantraniliprole 0.4G @ 500 g/ha in nursery + 10 kg/ha at 25 DAT + 18.5 SC @ 150 ml/ha (T₉) with 64.61% reduction over control.