A study was conducted in the laboratory of the Department of Agronomy, Faculty of Agriculture, Federal University of Kashere, Gombe state, to evaluate the effects of powders of some spices (pepper, ginger and garlic) for the control of Callosobruchus subinnotatus on stored Bambara groundnut. The experiment was laid out in a Completely Randomized Design (CRD) with three (3) treatments, and control. Each treatment was replicated three times. The results from the research showed that garlic powder caused a significantly (p≤0.05) higher adult C. subinnotatus mortality, which was followed by pepper powder and ginger powder in that order. In addition, there was no significant (p>0.05) difference in number of exit holes between Bambara groundnut treated with the three different spices. However, 4 and 8 grams gave best results on days 12 and 16 evidenced with significantly (p≤0.0) fewer exit holes in Bambara groundnut. Results further showed higher weight loss from C. subinnotatus infested stored Bambara groundnut treated with garlic than the other treatment combinations and control, though this was not significant (p>0.05) when compared with Bambara groundnut treated with pepper and ginger. The experiment further showed that higher levels of the spices (12g) caused highest adult C. subinnotatus morality compared with lower ones and control. It is therefore recommended that both farmers and storeowners should adopt the use of these spices, and in higher levels in protecting stored Bambara groundnut against infestation by C. subinnotatus, as there is the added advantage of avoiding synthetic insecticides for the more environmentally friendly botanical ones.
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