Abstract
In this study which was carried out in 1991-1992 and Eskisehir, the biology of the bean weevil ( Acanthoscelides obtectus ) was investigated. As a result of the research, it was found that the bean weevils reproduce continuously in the store during the winter and that adult emergence begins in September. It's females which copulated after emergence lay their eggs in heaps on bean capsules during the drying mature each, heap containing average 30±2.34 eggs, male: female sex rate being 1.148/1. The incubation period lasts 7-9 days and that the bean weevil undergoes fours larvae phases within the seed and the larvae complete their developing period in 39-58 days, that they convert into developed stage in pupa and cocoon, that this stage lasts for 12-19 days, later reaching to full development, that they give their first generation in field and this period is completed in 70-89 days, giving 3 in room temperature and total 4 generation in a year.
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