Comparative Efficacies of Insecticides against Rice Gall Midge, Orseolia oryzae (Wood-Mason) Management

Abstract

The Rice Gall Midge (Orseolia oryzae) has been reported as a 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.  Management of rice gall midge is required in case it reaches above the economic injury level (EIL) and this can be attained through novel insecticides which are important in sustainable agriculture practices. Therefore, a field experiment was carried out to determine the comparative efficacy of newer insecticides with different modes of application. A total 5 insecticidal molecules were selected with their both granular and foliar formulations, viz., Flubendiamide 0.7G, 20 WDG; Cartap hydrochloride 4G, 50 SP; Chlorantraniliprole 0.4G, 18.5 SC; Fipronil 0.3G, 5 SC and Carbofuran 3G as check insecticide, applied at nursery and 25 DAT, 25 DAT and PI to Booting and, Nursery, 25 DAT and PI to Booting stages against rice gall midge, Orseolia oryzae (Wood-Mason) in rice during rabi, 2020-2021. All the treatments were effective for gall midge. Fipronil 0.3G formulation @ 1000 g/ ha at nursery, 20 kg/ ha at 25 DAT and 5 SC @ 1000 ml/ ha at PI to Booting stage (T₁₂) was significantly superior (>80% reduction over control) for gall midge management followed by Carbofuran 3G (T₁₃) @ 2000 g/ ha at nursery and 25 kg/ ha at 25 DAT (>75% reduction). The untreated plots had more silver shoots (6.47% overall silver shoot mean) than other chemical-treated plots. However, among all the treatments, Chlorantraniliprole (T₉) took the lead in the highest yield realization (79.08 q//ha) with a 42% increase over control.