Spotted Wing Drosophila

Spotted wing drosophila (SWD), Drosophila suzukii, a pest of Asian origin, was confirmed August 10, 2012 in several counties throughout Minnesota. This new pest will pose significant challenges to small fruit producers since SWD has many generations per year, and the females lay their eggs directly into the fruit of raspberry, blackberry, blueberry, grapes and several other fruit crops. This page highlights several updates for SWD in Minnesota, including: fact sheets, distribution maps, and both conventional and organic Insecticidal control and cultural control options.

SWD Trapping Network

The SWD trapping network provides weekly trap counts for growers to assist in pest management decisions.

SWD Biology & Management

SWD biology and distribution, trap construction and resources, and insecticide recommendations.

SWD Updates

Spotted Wing Drosophila (SWD) Flights Increase

[7/18/19] Since July 8^th and during the past week, SWD numbers for traps located in berry crops (mostly blueberry, summer raspberry) increased substantially – up to 191 and 176/wk at Forest Lake and the HRC-Arboretum, respectively.

Spotted Wing Drosophila (SWD) Flights Continue to Increase: Alert and Update

[7/3/2019] SWD activity is increasing across the state!

more swd updates