Efficacy of Various Plant Extracts and Synergism Against Domestic Species of Rice Weevil Sitophilous Oryzae (Curculionidae: Coleoptera)

Despite being successful in preventing pests from entering stored goods, residual synthetic pesticides have had a negative impact on the environment.However, the prohibitive cost of synthetic pesticides and the risk of target pests developing insecticide resistance have prompted researchers to develop alternative management strategies.Since plant-based pesticides are biodegradable and less dangerous for organisms other than the target species, they are a useful alternative to chemical pesticides.The aim of the present study was to investigate the effectiveness of plant extract in preventing the rice weevil Sitophilus oryzae (Linnaeous) (Coloptera: Curcolinidae) from infesting stored-products.For toxicity and synergism against S. oryzae, aqueous extracts of Cannabis sative L., Dodonaea visicosa L., and Parthenium hysterophorus L., were evaluated at different concentrations.D. viscosa