Abstract
Musca domestica L. (Diptera: Muscidae) is a relevant domestic, medical and veterinary pest against which new active ingredients must be continuously developed and tested. A key feature of these ingredients is the ability to interfere with the reproductive capacity, causing sterility in both sexes. The authors have developed two simple low-cost devices to evaluate the reproductive capacity in both sexes of M. domestica. The use of these devices for experimental tests could be extended to other fly species.