Five and ten percentage rates of leaf powder of Calpurnia aurea (Ait.) Benth and Millettia ferruginea (Hochst) Baker as well as red and white local inert dusts each and their integration with resistance varieties of maize were evaluated as protectant against Sitophlus zeamais under laboratory condition. All treatments of the tested management tactics induced significantly (p < 0.05) higher adult mortality of weevils (8.33 to 71.67) at both tested rates (5 and 10%) in 2 to 4 days of post treatment application than untreated check. The maximum of these were being in integrated treatments, followed by the C. aurea and M. ferruginea, while relatively the minimum were red and white inert dusts treatments, respectively. All of the treatments of integration and other tactics applied at tested rates were also induced significantly (p < 0.05) higher (≥63.16%) inhibition of F1 progeny emergence, higher reduction in grain damage (≤6.67) and weight loss (≤1.12) of maize grain due to S. zeamais than negative control, the maximums of which were caused by integration, followed by the two botanicals, while relatively minimums were induced by inert dusts. Thus, all the management tactics tested at rates of 5% and above (10%) were potent in preventing maize grains against maize weevils and thus, they could be used in managing maize weevils at the rate of 5 and 10% under farmer’s storage conditions in Ethiopia.
Key words: Calpurnia, Millettia ferruginea, red inert dust, white inert dust, Sitophlus zeamais, resistant varieties, integration.
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