Abstract

BIO-EFFICACY OF FIVE DIFFERENT PLANT EXTRACTS AGAINST CALLOSOBRUCHUS MACULATUS (STORED PEST), SPODOPTERA LITUA (FIELD PEST) AND AEDES AEGYPTI (VECTOR)

Saranya J., I. D. Kasinathan and Elumalai K.*

Abstract

To investigate the larvicidal, ovicidal and pupicidal activity of methanol leaves extract of five different plants Euphorbia hirta, Moringa oleifera, Cassia senna, Toddalia asiatica and Mallotus repandus against the stored pest - Callosobruchus maculatus, field pest - Spodoptera litua and vector - Aedes aegypti. The larvicidal, ovicidal and pupicidal activity was assayed in the methanol leaf extract of five different plants against Callosobruchus maculatus, Aedes aegypti and Spodoptera litura at different concentration ranging from 100 to 400 ppm under the laboratory conditions. Mortality of each was recorded after 24 hours exposure to extract. Preliminary qualitative phytochemical analysis was studied. Then, it was observed that the bio-efficacy of the methanol extracts of Euphorbia hirta, Moringa oleifera, Cassia senna and Mallotus repandus showed insecticidal activity against the targeted pest. Whereas, Toddalia asiatica exhibited 100% insecticidal activity against the stored pest, field pest and vector. From, the results it can be concluded that the methanol extracts of Toddalia asiatica have an excellent potential and considered to be the promising plant to use against pest and vector control. Therefore, future studies on the bio-efficacy of the compounds will pave the way to know about the compounds toxicity against the targeted insects.

Keywords: To investigate the larvicidal, Toddalia asiatica targeted insects.