Drosophila flies are associated with bacteria and microfungi that can be isolated from the insects and their habitats. Many Drosophila species live on overripe plant material and depend on the growth of yeasts. Interestingly, D. suzukii is able to develop on fresh fruit and the ecological and physiological importance of yeast is less clear. We study the activity of D. suzukii- associated microorganisms and their metabolites. In addition to our basic interest in insect-microbe interactions, we aim to develop microbial-based pest control tools.