Toxicological effect of underutilized plant, Cleistanthus collinus leaf extracts against two major stored grain pests, the rice weevil, Sitophilus oryzae and red flour beetle, Tribolium castaneum.

摘要: Toxicity and repellency activity of Cleistanthus collinus (Roxb.) (CC) leaf extracts were evaluated against rice weevil, Sitophilus oryzae (L.) red flour beetle, Tribolium castaneum (Herbst) under laboratory condition. Five concentration(s) (1%, 1.5%, 2%, 2.5% 4%) with two controls (acetone water) treatments along deltamethrin used for direct contact residual toxicity. The insect that survived after CC exposure transferred to an untreated feeding substrate the population buildup subsequent generation recorded 30 (F1) 60 days (F2). In toxicity, highest concentration (4%) produced 75% mortality in S. 62.5% T. during 7 exposure, whereas toxicity 81% 58% respectively, castaneum. long term effect was apparent both species, where F2 populations significantly decreased treatments. treatment at 4% similar adult comparison 1%. addition, repellent observed This is first step towards assessing scientific basis understanding effectiveness stored grain pests it could be a viable eco-friendly option pest management.