Acanthoscelides obtectus is an insect pest that feeds on wild and cultivated common beans. Two trichodiene (TD) producers (T34–5.27, E20–5.7) of Trichoderma spp., and their corresponding wild strains (T34, E20), were evaluated to determine the effect of TD production on the toxicity of these strains against A. obtectus adults. TD is a non-phytotoxic volatile organic compound (VOC), which is an intermediate in the biosynthesis of trichothecenes. Daily emergence of insect was increased in treated beans with TD producer's strains, compared with beans treated with the wild strains. T34–5.27 and E20–5.7 had the capacity to attract a higher percentage of insects than their parental strains. As a result, a higher number of beans is damaged, and subsequently resulted in a higher bean weight loss. Between the parental strains, E20 is repellent for both sexes, produced a smaller number of damaged beans and a lower number of holes per bean. These results would indicate that production of TD is negative for the control of this insect pest, and that even when TD is not phytotoxic, the response of beans against A. obtectus, implies that the presence of this VOC significantly reduce the bean defensive response against this pest.