பூச்சியியல், பறவையியல் & ஹெர்பெட்டாலஜி: தற்போதைய ஆராய்ச்சி
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Insecticidal and Repellent Activities of Toddalia asiatica (L.) Lam. Extracts against Three Major Stored Product Pests

Gopal Nattudurai, Santiagu Stephen Irudayaraj,Michael Gabriel Paulraj, Kathirvelu Baskar, Savarimuthu Ignacimuthu

Fumigant toxicity and repellent activity of Toddalia asiatica (L.) Lam. (Rutaceae) leaf and fruit extracts were screened against Callosobruchus maculatus (F.), Sitophilus oryzae (L.) and Tribolium castaneum (Herbst) adults. All the three solvent extracts of leaf and fruits recorded mortality and repellency against the three tested insects in a concentration dependent manner. C. maculatus was the most susceptible pest to the treatments. Lethal concentrations for 50 percent mortality (LC50) of C. maculatus, S. oryzae and T. castaneum were recorded as 39.19, 44.13 and 61.10 μL/L, respectively. Diethyl ether fruit extract exhibited 100% repellent activity against C. maculatus and S. oryzae and 92% against T. castaneum adults at 20 μL concentration. These results suggested that Diethyl ether fruit extract of T. asiatica can be used as an ecofriendly fumigant and repellent against C. maculatus, S. oryzae and T. castaneum.