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Home / Terrestrial Invasives / Terrestrial Invertebrates / Spotted Wing Drosophila

Spotted Wing Drosophila

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Spotted wing drosophila
Spotted wing drosophila, adult male - Photo by Hannah Burrack; North Carolina State University
Scientific Name: 
Drosophila suzukii (Matsumura, 1931) (CABI)
Common Name: 
Spotted wing drosophila, cherry vinegar fly
Native To: 
Presumed to be Asia (Adrion et al. 2014)
Date of U.S. Introduction: 
Hawaii in 1980s; continental U.S. in 2008 (Asplen et al. 2015)
Means of Introduction: 
Possibly in fruits imported from Asia (Rota-Stabelli et al. 2013)
Pest of unripe berries and stone fruits capable of causing significant economic losses (Asplen et al. 2015)


USDA. Animal and Plant Health Inspection Service.

APHIS has prepared an environmental assessment for permitting the release of the insect Ganaspis brasiliensis for the biological control of spotted-wing Drosophila (Drosophila suzukii) in the continental United States. Based on the environmental assessment (EA) and other relevant data, the agency has reached a preliminary determination that the release of this control agent within the continental United States will not have a significant impact on the environment. The proposed action is intended to reduce the severity of damage to small fruit crops from infestations of spotted-wing Drosophila (SWD) in the continental United States. SWD is native to East Asia and was first detected in the United States in California in 2008. It has since established in most fruit-growing regions in North America.

APHIS is making the environmental assessment available to the public for review and comment. All comments received on or before August 16, 2021 will be considered. To review the environmental assessment and make comments, go to

Washington State University. College of Agricultural, Human, and Natural Resource Sciences.

A parasitoid wasp that is the natural enemy of a fly known as the spotted-wing drosophila could be a good friend to growers. Washington State University researchers recently confirmed the discovery of the potentially beneficial wasp in the United States for the first time. The drosophila flies cause major damage to several Washington crops, especially sweet cherries and berries. The wasp, which lays its eggs in the flies, could be a means of controlling their spread.

Entomological Society of America. Entomology Today.

Spotted-wing drosophila (Drosophila suzukii), is an invasive fruit fly species that causes about $500 million in economic damage to fruit crops in the U.S. each year. A native to southeast Asia, it arrived in the U.S. in Hawaii in the 1980s and in the continental U.S. in California in 2008. It is now widespread through many parts of the U.S. and the world. In a new review article published last week in the Journal of Economic Entomology, Vaughn Walton, Ph.D., of Oregon State University and a multi-university team of experts have created a comprehensive look at how SWD management strategies are evolving to address these challenges.

The U.S. Department of Agriculture grant that funds part of Walton and colleagues SWD research stipulates that they work with industry influencers, and they have been doing this from the beginning. They bring technologies to industry and seek feedback on how well the technologies work in actual practice. "Federal funding is allowing us to listen to and serve our clients—the growers," Walton says. As the Journal of Economic Entomology paper details, many promising control strategies are being developed for this challenging and uniquely adaptable invasive species. With continued advances, researchers can hope that populations of SWD can be controlled and the damage they cause reduced.

Distribution / Maps / Survey Status

University of Georgia. Center for Invasive Species and Ecosystem Health.
Provides state, county, point and GIS data. Maps can be downloaded and shared.
University of Georgia. Center for Invasive Species and Ecosystem Health. Early Detection & Distribution Mapping System.
USDAAPHIS. Cooperative Agricultural Pest Survey. National Agricultural Pest Information System.


University of Georgia. Center for Invasive Species and Ecosystem Health.
Australian Plant Biosecurity Cooperative Research Centre. Pests and Diseases Image Library.


Google. YouTube; Purdue Extension Entomology.

Selected Resources

The section below contains highly relevant resources for this species, organized by source. Or, to display all related content view all resources for Spotted Wing Drosophila.

Council or Task Force

Washington State Recreation and Conservation Office. Washington Invasive Species Council.

New York Invasive Species Clearinghouse.

North Central Integrated Pest Management Center.

See also: Spotted Wing Drosophila in the Northeast for more resources

Plant Health Australia.

Sustainable Spotted Wing Drosophila Management.
A national team of scientists, with support from the USDA Specialty Crop Research Initiative, that seeks to advance the development of sustainable, integrated management strategies for spotted wing drosophila, SWD, based on biology.
Texas State University System. Texas Invasive Species Institute.
Federal Government
USDAAPHIS. Plant Protection and Quarantine.
See also: APHIS Pests and Diseases for more resources
International Government
New South Wales Department of Primary Industries (Australia).
British Columbia Ministry of Agriculture.
State and Local Government
Oregon Department of Agriculture.
See also: Pest Alerts for more pests

Florida Department of Agriculture and Consumer Services. Division of Plant Industry.

See also: Plant Industry Pest Alerts for more pests

Minnesota Department of Agriculture.

Utah State University Extension; Utah Plant Pest Diagnostic Laboratory.

See also: Fact Sheets - Small Fruit Insects for more species

University of Massachusetts Extension. Fruit Program.
Washington State University. Tree Fruit Research and Extension.

Michigan State University. Integrated Pest Management Program.

The Spotted Wing Drosophila (SWD) is a vinegar fly of East Asian origin that can cause damage to many fruit crops. This small insect has been in Hawaii since the 1980s, was detected in California in 2008, spread through the West Coast in 2009, and was detected in Florida, Utah, the Carolinas, Wisconsin and Michigan for the first time in 2010. This website will be the central location for dissemination of information about this insect. Check back for updates. This team is also helping to coordinate research projects to understand how best to protect fruit from infestation by this new pest.

University of Minnesota. Extension.

University of Wisconsin - Madison. Department of Entomology.

University of Kentucky. College of Agriculture, Food, and Environment. Entomology.