Toxicity of garlic oil was tested against adults of Callosobruchus chinensis
(L.), C. maculatus (F.), Tribolium castaneum(Hbst.) and Sitophilus oryzae(L.) using air
tight jars for the fumigant toxicity and topical application for the contact toxicity. The
study revealed that adults of C. chinensis were more susceptible to the fumigant
toxicity of garlic oil than C. maculatus and T.castaneum, while S. oryzae adults were
the least susceptible one. The LC50 values were 0.081, 0.21, 0.22 and 1.771J / L air for
the above-mentioned insects, respectively. In the contact bioassay, C. chinensis , C.
maculatus and T.castaneum were more susceptible to garlic oil than S oryzae. The
LDse values were 10.3, 10.4 , 11.6 and 50.3 ppm/insect for the four tested adult
insects, respectively