Bioefficacy of organic extracts of A. sativum against S. zeamais (Coleoptera; Dryophthoridae)

Abstract

Laboratory based experiments were carried out to determine the fumigant toxicities, repellent and progeny emergence inhibition activities of Methanolic, Hexane and Methanolic: Hexane blend extracts of Allium sativum on Sitophilus zeamais (Coleoptera; Dryophthoridae). Four different concentrations (25, 50, 75 and 100%) of the extracts were tested. the fumigant toxicities of the A. sativum extracts were found to be dependent on both concentration and exposure time. the maximum toxicities (96.15%) was recorded for higher concentration of blend extracts and minimum (6.41%) with hexane extracts of A. sativum at lowest concentration of (25%). The three different A. sativum extracts recorded significantly good level of repellent activities and reduction in progeny emergence.