Determination of chlorantraniliprole for managing Helicoverpa armigera and Spodoptera litura in cotton ecosystem

• Published in: Environmental research 2023-12, Vol.239, p.117301-117301, Article 117301
• Main Authors: Anuradha, P., E, Madhu Sudhanan, Priyanka, M., Emaiya, R., Karthik, P., Suganthi, A., Krishnamoorthy, S.V.
• Format: Article
• Language: English
• Subjects: Chlorantraniliprole; Cotton; Helicoverpa; Residue; Safety; Spodoptera
• ISSN: 0013-9351; 1096-0953
• DOI: 10.1016/j.envres.2023.117301

Cotton bollworm incidence and damages are high in India. In addition, it causes considerable yield loss. A new insecticide formulation Chlorantraniliprole 600 g/L SC was used along with recommended insecticides for managing Spodoptera litura and Helicoverpa armigera in two consecutive experimental trials during the period October 2021 to September 2022. Two foliar applications of Chlorantraniliprole (40 and 30 g a. i/ha) at ten days interval period reduced significantly the larval populations of H. armigera, S. litura without any phytotoxic symptoms in cotton. Chlorantraniliprole application in open field condition was found to be harmless to natural enemy (coccinellids and spiders). Even though, a temporary lessening of natural enemy populations was noticed after spray, progressively the population was increased within a week time. Cotton yield was high in chlorantraniliprole @ 40 g a. i/ha treated plot (22.66, 22.12 q/ha) when compared to untreated control. Similar effect was also noticed in the dose at 30 g a. i/ha (22.35, 21.81 q/ha) and it was statistically on par in both experiments. Residue analysis results confirming that, cotton lint, cotton seed and soil samples collected from treated (30 and 60 g a. i/ha) and untreated samples during harvest were free from chlorantraniliprole residues (below detectable levels of 0.008 μg/g). •Chlorantraniliprole 600 g/L SC at 40 and 30 g a. i./ha considerably reduced H. armigera, S. litura.•Foliar applied chlorantraniliprole @ 30 and 60 g a. i./ha did not cause any phytotoxicity.•Chlorantraniliprole was found to be comparatively safer to natural enemies.•Chlorantraniliprole treatment (40 and 30 g a. i./ha) increased marketable cotton yield.•Chlorantraniliprole residues were BDL (0.008 μg/g) in cotton lint, seed, soil at harvest.