Contact Toxicity and Effect on Progeny of Two Green Pesticides Against some Stored Product Insects Compared to Malathion | ||
| Journal of Plant Protection and Pathology | ||
| Article 6, Volume 16, Issue 3, March 2025, Pages 159-162 PDF (748 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jppp.2025.353352.1304 | ||
| Authors | ||
| A. M. Abouelatta* ; Doaa M. El-Talpanty; Walaa M. Alkot | ||
| Stored Grain and Product Pests Research Department, Plant Protection Research Institute, Agriculture Research Center, Giza 12611, Egypt. | ||
| Abstract | ||
| The study investigated the efficacy of two plant-derived green pesticides (Techno oil and Berna star) in comparison with Malathion for controlling two major stored product insect pests: Rhyzopertha dominica and Tribolium castaneum. The research assessed both the contact toxicity and the impact on progeny, with the aim of finding safer alternatives to conventional chemical pesticides. Malathion exhibited the strongest toxicity against both R. dominica and T. castaneum. After 24 hours of exposure, it showed a significant impact on both insect species, with a pronounced effect on R. dominica. For T. castaneum, no mortality was observed after 24 hours of exposure to either green pesticide, indicating limited effectiveness. However, after 72 hours, the green pesticides showed a 100% mortality against R. dominica. For R. dominica, both Techno oil and Berna star were effective against R. dominica, achieving 100% mortality after 72 hours across all concentrations. The study also examined the impact of these treatments on progeny production, which is an important consideration in pest control. While Malathion was more immediately effective, both plant extracts showed potential in reducing progeny over time. Techno oil also exhibited a delayed effect but had a weaker performance compared to Malathion and Berna star. T. castaneum was found to be more tolerant to the tested pesticides, particularly the green alternatives, compared to R. dominica. This could indicate that T. castaneum might require longer exposure times or higher concentrations for effective control. | ||
| Keywords | ||
| Berna star; Techno oil; Tribolium castaneum; Rhyzopertha dominica; Thin film; LC50 | ||
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