FUMIGANT TOXICITY OF SOME PLANT VOLATILE OILS AGAINST PULSE BEETLE CALLOSOBRUCHUS MACULATUS

摘要

Fumigant toxicity of five plant volatile oils viz., ginger oil (Zingiber officinale), patchouli oil (Pogoste moncablin), garlic oil (Allium sativum), cinnamon oil (Cinnamomum zeylanicum) and lemon oil (Citruslimon) were evaluated at 0.01%, 0.05%, 0.1%, 0.5% and 1.0% concentrations against the egg, larva, adult of the pulse beetle Callosobruchus maculatus along with their effect on the opposition. The results revealed that the fumigant toxicity indicated by the lowest egg hatching of 10% was observedwith 1.0% concentration of C. zeylanicum andZ. officinale', also, maximum larval mortality of 90% was observed. The adult mortality was 90% with C. zeylanicum oil at 1.0% and 72.50% with Z. officinale oil at 1.0%. C. zeylanicum and Z. officinale at 1.0%concentration also resulted in minimum oviposition of 3.00 and 4.25 eggs, respectively in contrast to 74 to 78 eggs in untreated control.