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VOL. 10, ISSUE 9 (2025)
Evaluation of Leadwood (Combretum imberbe) against rusty red grain beetle (Cryptolestes ferrugineus) on stored grains
Authors
Masego Kgosietsile Mfuma, Mosimanegape Mitch Legwaila, Ntebaleng Makate
Abstract
The rusty red grain beetle, Cryptolestes
ferrugineus (Stephens) is a pest of high economic
importance. It is reported to infest stored
products causing huge economic losses. This study evaluated Combretum
imberbe wood ash against C. ferrugineus
on stored cereals and pulses at 28±2oC and 70±5% RH in the laboratory at the University of Botswana. The bioassay was conducted using three concentrations (1g, 3g and 5g/50g
food commodity) of C. imberbe wood ash powder. Each treatment was replicated 5 times. The toxic effect was evaluated
3 months following application and probit analysis was used to determine the LC50
values for the treatments. At the highest concentration C. imberbe was
able to cause 50% mortality of beetles on broken maize and broken sorghum over
the period of the experiment. When treatments were applied to pulses, the
highest mortality was achieved on broken Bambara groundnuts, ground Bambara
groundnuts and broken cowpeas. The type of stored food commodity did not
significantly affect the effectiveness of C. imberbe wood ash powders. This study showed that C. imberbe wood ash powder can be used in
combination with other control measures to achieve effective control of C.
ferungineus and reduce the application of synthetic insecticides to stored
food commodities.
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Pages:75-81
How to cite this article:
Masego Kgosietsile Mfuma, Mosimanegape Mitch Legwaila, Ntebaleng Makate "Evaluation of Leadwood (<i>Combretum imberbe</i>) against rusty red grain beetle (<i>Cryptolestes ferrugineus</i>) on stored grains". International Journal of Entomology Research, Vol 10, Issue 9, 2025, Pages 75-81
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