A female fly penetrates fruit with its large serrated ovipositor, leaving a small puncture wound. Infested fruit then becomes brown, soft, and sunken and will typically develop microbial growth at the puncture site.
This short video demonstrates the salt flotation method for monitoring SWD larvae in fruit.
The most important component of a management regime for SWD involves intensive monitoring for the presence of adult flies. Several homemade and commercial traps are available for SWD control, as well as several bait and lure formulations. Below is a list of extension resources detailing current management protocols for SWD from several states in different crops.
Available Management Resources
Western United States
- University of California – General SWD IPM
- Colorado State University – General SWD IPM
- Oregon State University – Specific SWD IPM in Oregon Blueberry
Midwestern United States
- Michigan State University – Specific SWD IPM in Michigan cherry and blueberry
- University of Wisconsin – General SWD IPM
- University of Minnesota – Specific SWD IPM for the Midwestern U.S.
Eastern United States
- Cornell University – Specific SWD IPM in New York blueberry and grape. This site also contains an active SWD distribution map for New York
- Spotted Wing Drosophila IPM in Blueberries from the NE IPM Center SWD Working Group
- Spotted Wing Drosophila IPM in Raspberries and Blackberries from the NE IPM Center SWD Working Group
- Spotted Wing Drosophila Invasive Species and Exotic Pests – Fact sheet from the New York State IPM Program
- Spotted Wing Drosophila: An invasive and destructive pest on raspberries, blueberries, blackberries, cherries, and more – Trifold brochure from the New York State IPM Program
- University of Maine – Monitoring blog of SWD in Maine caneberry