Acanthoscelides obtectus Say (Coleoptera: Chrysomelidae: Bruchinae), is an insect pest that attacks wild and cultivated common beans, Phaseolus vulgaris L. To control insect plagues, it is a priority to choose compounds with different modes of action, with greater selectivity and less persistence. There is an increasing demand in the search for new active substances and natural plant products for pest control for the reduction of adverse effects on human health and environment. Therefore, this investigation evaluated under laboratory conditions, three doses (24, 60 and 120 μL) of Cymbopogon winterianuss and Ocimum basilicum essential oils over bean seeds placed in Petri dish in which A. obtectus insects were added before. Treatments of bean seeds with different doses of essential oils provided different survival on A. obtectus adults. The essential oils affected the development of A. obtectus insects since the greatest doses applied on beans decreased the emergence of the bean weevil. Also, reduced the number of exit holes of insects by damaged beans and the vean weight los, from 2,987% in control treatment, to 1,014% and 1,221% with the dose 120 μL of C. winterianuss and O. basilicum, respectively. The ability of both doses of C. winterianuss and O. basilicum to reduce their longevity, their subsequent emergence from insects, and protect the bean seeds, make these essential oils a suitable tool for the control of adults of this insect pest in small storages.