Skip to main content

Cornell Fruit Resources

Resources for Commercial Growers

Spotted Wing Drosophila (SWD)

Genus species: Drosophila suzukii

The spotted wing Drosophila (SWD) is a vinegar or fruit fly of East Asian origin. It made its way into New York by 2011. Today, it has spread throughout most of the continental US. It can directly infest the fruit of many plants, but is most attracted to raspberries, blackberries, blueberries, and other late-season, soft-flesh fruits — cultivated and wild.

SWD deserves notice because, unlike her relatives, which lay eggs on over-ripe or rotting fruit, she can lay eggs inside fresh fruit, often before harvest. After only a few days, the fruit skin becomes dimpled or wrinkled, forming craters in the fruit. Without control measures, late season raspberries, blackberries and blueberries can suffer upwards of 80% crop loss.

Cornell University is coordinating SWD monitoring in NY. A map of current findings is found on the Distribution maps page and the SWD blog reports where it is being caught.

Crops of concern and wild hosts

Monitoring

Identification

Management

Distribution maps

Economic and environmental impact

Biology and life cycle


SWD Resources:


 


Spotted Wing Drosophila Blog:


Latest posts:

  • First catch in Washington County
    Four female SWD were caught in two traps set on the edge of a blueberry planting in Washington County. Traps were checked on June 17, 2019 by Laura McDermott, berry and vegetable specialist on the CCE Eastern NY Commercial Horticulture Program. Fruit in the planting is sizing up beautifully, but is still hard and green ...continue reading "First catch in Washington County"
  • First catch in Suffolk County
    One female SWD was caught in a trap set on the edge of a blueberry planting in Suffolk County. Traps were checked on June 13, 2019 by Faurque Zaman, CCE Association of Suffolk County and Long Island Horticultural Research and Extension Center. Numbers of SWD being caught are still relatively low and fruit is not ...continue reading "First catch in Suffolk County"
  • Sustained catch in Ulster County
    Four SWD — two males and two females (on a double date in the Scentry trap?) were caught on June 12, 2019 in traps set within a raspberry planting in Ulster County. Also, a single male caught in another site in Ulster, in blueberry that day. These traps are being monitored by Jim O'Connell, CCE ...continue reading "Sustained catch in Ulster County"
  • First catch in Chemung County
    One female SWD was caught in a trap set on the edge of a blueberry planting. Traps were checked on June 12, 2019 by Shona Ort, CCE Association of Chemung County. Blueberry fruit have set in many locations across NY. Most fruit are still green and too hard for SWD to lay eggs in. Keep ...continue reading "First catch in Chemung County"
  • Sustained catch in Putnam County
    A single SWD female was caught in traps checked on Monday, June 10, 2019. These traps are being monitored by Michael Principe, CCE Master Gardener Program in Putnam County for the Eastern NY Commercial Horticulture Program. Because numbers are so low at this site, we're going to check again for another week or so to ...continue reading "Sustained catch in Putnam County"
  • Sustained catch in Albany County
    Twelve SWD were caught in traps set in and on the edge of a raspberry planting in Albany County. Traps were checked on Monday, June 10, 2019 by Natasha Field, CCE Eastern NY Commercial Horticulture Program. This uptick in numbers is of great concern for growers of at-risk fruit: strawberry raspberry blackberry blueberry elderberry sweet ...continue reading "Sustained catch in Albany County"
  • IPM guides for SWD now available
    IPM guides for SWD in brambles and blueberries are now available — just in time for the 2019 growing season! The early arrival of SWD in New York will surely motivate you to review the information in these IPM guides. Download them from the Northeastern IPM Center website, provided below, or via the SWD IPM ...continue reading "IPM guides for SWD now available"

powered by RSS Just Better 1.4 plugin

Skip to toolbar