Trapping spotted wing drosophila (Drosophila suzukii) with apple cider vinegar and wine

The spotted wing drosophila (SWD) is newly introduced in western and southeastern North America and is a serious threat to berry, cherry, and grape crops. Research is underway to develop chemical lures that might provide greater power of attraction, improved longevity and reliability of lures, and potential use in dry traps and killing stations. Acetic acid and ethanol contribute significantly to the attractiveness of wines and vinegars that are used in traps. However, experimental evidence shows that additional volatile chemicals from vinegars and also from wines add to the attractiveness. Isolation and identification of those co-attractants (with acetic acid and ethanol) should provide a superior synthetic chemical lure for use in traps.