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Larvae and pupae develop entirely within grain legumes. Adults emerge through a window cut in the testa, so heavy infestation can result in a large number of holed seeds, with adults moving across the stored commodity.
Cultural Control and Sanitary Methods
Good store hygiene plays an important role in limiting infestation by this species. The removal of infested residues from last season's harvest is essential. When small lots of beans are stored, daily turning of the storage container can significantly reduce infestation.
Due to the variable regulations around (de-)registration of pesticides, we are for the moment not including any specific chemical control recommendations. For further information, we recommend you visit the following resources:
A. obtectus is a serious pest of common beans (Phaseolus vulgaris) and lima beans (Phaseolus lunatus). It has been recorded on a number of other legumes, including cowpeas in Mexico, chickpeas and Voandzeia subterranea, but it seldom attains pest status on these hosts.