Dose response assessment of selected insecticides against Aphis gossypii Glover infesting Bt cotton under laboratory condition
Year: 2026
Type: article
Abstract: The cotton aphid (Aphis gossypii Glover) has emerged as major sucking pest in Bt cotton, exhibiting resistance to diverse chemical classes.This study evaluated the dose-response toxicity of eight insecticides against A. gossypii nymphs using the leaf-dip bioassay method under laboratory conditions.Mortality was recorded at 72 hours post-treatment and analysed using probit analysis.Based on median lethal concentration (LC ) values, toxicity followed the descending order: acetamiprid 20 SP (0.002%) > 50 thiamethoxam 25 WG (0.004%) > fipronil 5 SC (0.005%) > clothianidin 50 WDG (0.006%) > flonicamid 50 WG (0.007%) > tolfenpyrad 15 EC (0.020%) > diafenthiuron 50 WP (0.037%) > afidopyropen 50 g/L DC (0.051%).Acetamiprid 20 SP exhibited the highest insecticidal toxicity with a toxicity level 25.50 fold greater than that of afidopyropen 50 g/L DC, the list toxic insecticide evaluated.These baseline toxicological findings provide essential insights for designing rotational chemical strategies and effective management of insecticides resistance in Bt cotton ecosystems.
Institution: Sardarkrushinagar Dantiwada Agricultural University
Language: English
Subfield: Molecular Biology
Domain: Life Sciences
SDG: Zero hunger
Open Access status: bronze
OpenAlex ID: W7225460789