Susceptibility of Musca domestica (Diptera: Muscidae) populations from Antalya (southwestern Turkey) to pyriproxyfen

Musca domestica L. (Diptera: Muscidae) is an important vector many bacterial, protozoal and viral infections. In this study, the housefly populations composed of flies collected between June 2006 and June 2007 from different localities of Antalya, Turkey were analyzed for resistance to pyriproxyfen. In the feeding tests, pyriproxyfen was applied to larval breeding jars. Twenty grams of medium were put in a jar, and then 2.5 ml of water containing pyriproxyfen or water alone was added and mixed into the medium. First instar larvae of the test species, 0–6 h old, were used in the assays. Four replicates of twenty-five larvae were used for each concentration level. The number of emerging flies was recorded during the 3 week-test period. The resistance ratios determined by comparing LC50 values of the test populations and sensitive strain of SRS/WHO. The resistance ratios ranged from 0.4 to 6.3 during the test period.