Efficacy of Chromolaena odorata leaf powder and Beauveria bassiana against stored grain pests

Toxicity study of Chromolaena odorata (L.) King & H. Rob. (Asteraceae) leaf powder @ 25 g/kg along with Beauveria bassiana (Bals.) Vuill. (Deuteromycetes) @12.5 g/kg revealed 100 and 50 adult mortality of Sitophilus oryzae (L.) (Coleoptera: Curculionidae) and Tribolium castaneum (Herbst), (Coleoptera: Tenebrionidae) at 20 days after treatment; C. odorata @100 g/kg gave highest mortality of 29.67% in the 1st instar larvae of Corcyra cephalonica (Stainton) (Galleriidae: Lepidoptera) at 20 days after treatment. Thus C. odorata leaf powder was found to be having insecticidal and repellency properties.