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International Research Journal of Plant Science

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Efficacy of protectants against maize weevils (Sitophilus zeamais Motschulsky) and the larger grain borer (Prostphanus truncatus Horn) for stored maize

Abstract

Loth S. Mulungu, Mgeta T. Kubala, ginethon G. Mhamphi, Robert Misangu and Cmaulid W. Mwatawala

The aim of this study was to determine the efficacy of natural available protectants to control S. zeamais and P. truncatus in stored maize grains. Results showed a reduction on live insects during maize storage in all protectants as opposed to no pesticides application. The pyrethrum flower powder and Actellic Super Dust were the most effective in killing both S. zeamais and P. truncatus followed by goat dung ash. Maize grains treated with goat dung ash indicated low weight loss, while maize grains treated with Sodium bicarbonate had high weight loss. It could be concluded that pyrethrum flower and goat dung ash are more effective in controlling S. zeamais and P. truncatus infestation. The efficacy of pyrethrum and goat dung as the powders in protecting stored maize grains against storage pests were validated in the present study. In general, all natural protectants used in this study have shown potentiality in the control P. truncatus and S. zeamais as they are more effective compared to no pesticide application treatment. Prostephanus truncatus, protectants, Sitophilus zeamais, seed weight loss, seed damage

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