Powder of Allium sativum and Ocimum gratissimum leaf and admixture of the two were evaluated for comparative efficacy in controlling Sitophilus zeamais Mots infesting stored maize. The powders were tested at 5, 10 and 15/40g of the respective food materials. The parameters compared were adult mortality, the oviposition as well as number of perforations/holes. Results revealed that the plant materials tested showed significant adult mortality rate, oviposition hindrance and perforation deterrence compared to control; as with the admixture material tested, the results indicates high significant differences among the treatments on mortality rate, oviposition and perforation deterrence compared to control. The periodic trend of the results epitomized that the admixture of A.sativum and O.gratissimum leaf powder performed better in quelling S.zeamais infestation during the stored period research. These findings also suggest that botanical insecticides are promising but their effectiveness may vary with species as well as concentration of the botanic used and the period kept under storage.
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