Field evaluation of selected insecticides against chilli thrips Scirtothrips dorsalis (Hood)

Abstract

A field experiment was conducted at Central Research Farm (CRF), Department of Entomology, Sam Higginbottom University of Agriculture, Technology, and Sciences. Prayagraj, Uttar Pradesh, during Rabi season 2023–24. The experiment was carried out in a randomized block design (RBD) with three replications and eight treatments. The precount populations were recorded one day before spraying, while the post-treatment observations were recorded 3, 7, and 14 days after each spraying. Two sprays of standard doses of Fipronil 5% SC @ 1 ml/lit, Imidacloprid 17.8% SL @ 0.5 ml/lit, Spinosad 45% SC @ 0.3 ml/lit, Broflanilide 20 SC @ 0.25 ml/lit, Acetamiprid 20% SP @ 4 gm/lit, Beauveria Bassiana 2×108 CFU/ml @ 5 ml/lit, Neem oil 1500 ppm @ 2.5 ml/lit, and untreated control were evaluated against chilli thrips. The mean of both sprays revealed that Broflanilide 20 SC @ (0.49) proved to be the most effective treatment, followed by Imidacloprid 17.8 SC @ (0.77), Spinosad 45 SC @ (0.92), Fipronil 5 SC @ (1.21), Acetamiprid 20 SP @ (1.60), Beauveria Bassiana 2×108 CFU/ml @ (2.11), and Neem oil 1500 ppm @ (2.36). The crop yield ranged between broflanilide (128 q/ha) and neem oil (48) as compared to the untreated control (28 q/ha). CBR ranged from broflanilid (1:8.16) to neem oil (1:2.44) as compared to the untreated control (1.1.04).