Abstract
AbstractOils obtained from neem (Azadirachta indica) seed kernel, the Himalayan cedar wood (Cedrus deodara) and their combination (1:1) each at 3, 2 and 1% concentrations were tested against adults of pulse beetle (Callosobruchus chinensis L.). Cedar wood oil exhibited highest fumigant potential at 3, 2 and 1% concentrations showing corrected inhibition (knock-down) of 100, 100 and 96%, respectively. While neem oil + cedar wood oil (1:1) at 3, 2 and 1% concentrations inhibited 96, 84 and 51.66%. The least corrected % knock-down of 62, 45 and 32 were observed by application of neem oil at 3, 2 and 1%, respectively, by Potters spray tower in 24 h of treatment. However, corrected percent mortality of the same study reveals highest mortality in the cedar wood oil rather than neem and their combinations. Topical application by Arnold hand microapplicator at the rate of 0.5 μl per insect at 3, 2 and 1% concentrations of both the oils and their combinations showed negligible mortality after 24 and 48 h of treatm...
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