Abstract
Three plant extracts - Thymus vulgaris, Schinus molle, and Melia azedarach - were tested against adult rice weevils at 25, 50, and 100% concentrations. All extracts caused significant mortality, reaching 100% with 50-100% solutions after one day. Extracts also reduced grain weight loss, damage, and adult emergence. S. molle was effective at 25% concentration (30-44% reduction), with higher efficacy at 100% (98% reduction). M. azedarach showed similar trends (62-69% at 25%, 100% at 100%). T. vulgaris was the most effective, achieving 69-73% reduction at 25% and 100% at all levels. These results suggest significant potential for these plant extracts in eco-friendly rice weevil control programs.
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