Evaluation the Efficacy of Abamectin and Spinosad Against Stored Grain Pests: Mortality, Persistence, and Residual Activity | ||
| Journal of Plant Protection and Pathology | ||
| Articles in Press, Corrected Proof, Available Online from 15 October 2025 PDF (477.96 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jppp.2025.415120.1373 | ||
| Authors | ||
| Eman L. Ayad* ; Hend T. Abd Elhalim | ||
| Plant Protection Research Institute (PPRI), Agricultural Research Centre, 12611, Dokii, Giza, Egypt. | ||
| Abstract | ||
| This study evaluates the efficacy, persistence, and residual activity of abamectin and spinosad against three major stored grain pests: Rhyzopertha dominica, Sitophilus oryzae, and Tribolium castaneum under controlled laboratory conditions (30±1ºC, 65±5% RH). Wheat grains were treated with varying concentrations of abamectin (0.01–0.06% w/w) and spinosad (0.012–0.192% w/w), and adult mortality was assessed after 1, 3, 5, 7, and 14 days. Progeny production was evaluated 60 days post-treatment. Mortality increased with higher doses and prolonged exposure, with all species exhibiting significant mortality after seven days. R. dominica was highly susceptible to both insecticides, with mortality ranging from 58.3% to 100% abamectin and 38.3% to 100% for spinosad. Similarly, S. oryzae showed high susceptibility, with mortality rates between 53.3% and 100%. T. castaneum was less affected, with mortality ranging from 15.0% to 100% abamectin and 3.3% to 100% for spinosad. Abamectin demonstrated greater residual efficacy than spinosad over six months. These findings highlight abamectin’s potential as a superior grain protectant; it offers long-lasting control against key storage pests and contributes to more effective pest management strategies in stored wheat grain. | ||
| Keywords | ||
| Stored grains insects Wheat protection; Pest management | ||
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