Official Pest Reports

Official Pest Reports are provided by National Plant Protection Organizations within the NAPPO region. These Pest Reports are intended to comply with the International Plant Protection Convention's Standard on Pest Reporting, endorsed by the Interim Commission on Phytosanitary Measures in March 2002.

USA Flag Spotted wing drosophila, Drosophila suzukii, a fruit pest in the United States
Date posted: 02/25/2010
Contact: Not available

Drosophila suzukii (Matsumura) (Diptera: Drosophilidae), spotted wing drosophila (SWD), has been found in California, Florida, Oregon and Washington. This fly is native to Southeast Asia and has been established in Hawaii since 1986. Hosts of SWD include, but are not limited to: blueberries, blackberries, strawberries, raspberries, cherries, grapes, apple, peach, plum, persimmon and uncultivated Rubus spp. Symptoms of infested fruit are small scars and indented soft spots on the surface, which are made by the female’s ovipositor as she lays eggs in the fruit. Larvae feed inside the fruit, resulting in fruit collapse and secondary fungal and bacterial infections. Drosophila suzukii is a temperate species, and it may be able to survive in much of the continental United States.

Under IPPC standards, Drosophila suzukii is considered to be a pest that is present, only in some areas in the United States.