author(s)
Wahedi Jasini Alexander, Vincent Victor Miyananiyi, Elkanah Obadiah Sambo, Yisa Solomon and Hariph Charity

abstract
The evaluation of the efficacy of plant powders on red flour beetle Tribolium castaneum (Herbst) (Coleoptera: Tenebrionidae) was carried out in Mubi. The plant products were the powders of Khaya ivorensis and Annona senegalensis. Permethrin 0.60% was used as positive control. 1.0g, 2.0g and 3.0g were constituted into four replicates for each of the treatment on 20.0g of sorghum, maize and millet flours. Thereafter, 10 newly emerged adult Tribolium castaneum were added. The effects were noted for their toxicity and suppression of development. The results revealed that the plant products tested were effective when compared with the control, since they significantly recorded higher mortality and also suppressed larval and F1 progeny emergence on different grain flours. Khaya ivorensis performed significantly (P>0.05) better than Annona senegalensis. Therefore, sustainable use of these plant products in the control of weevils on stored foods is recommended especially Khaya ivorensis on Tribolium castaneum.