Toxic Effect of Some Plant Extracts on the Productivity of Wheat Granary Weevil, Sitophilus granarius (L.) (Coleoptera: Curculionidae)



In this study, leaf extracts of parsley, Petroselinum crispum; mint, Mentha piperita and thyme, Thymus vulgaris were used in the experiment to evaluate for their effect on productivity against granary weevil, Sitophilus granarius. All the extracts of test plants had effects on productivity to the granary weevil. The reduction of adults was highest in mint for granary weevil. Effects on productivity of leaf extracts are more or less same. Effect on productivity increased proportionally with the concentration of the plant extracts.

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