Monitoring Information for Spotted Wing Drosophila

Resources to help you determine if there is Spotted Wing Drosophila on your farm or around your home. 

Degree-Day Model - Temperature-based SWD development model produces forecast of SWD activity.  Map should default to a weather station near you and can be changed by clicking another location on the map.

SWD Clock - Provides table of degree-days accumulated so far this season in several western locations; includes comparison to normal and previous seasons' degree-day accumulation.


Monitoring Trap for Spotted Wing Drosophila (SWD)

SWD Monitoring for Oregon Non-Commercial Backyard Gardeners



Recognize fruit damage from spotted wing drosophila, Drosophila suzukii. 2010. Walton, V., J. Lee, D. Bruck, P. Shearer, E. Parent, T. Whitney, A. J. Dreves. 2010. OSU Extension Publication EM 9021.

Dichotomous Key (courtesy of ODA)

SWD ID Card (courtesy of UC Berkeley and UC Cooperative Extension)

Spotted Wing Drosophila (SWD) Monitoring, Identifying, and Fruit Sampling (courtesy of WSU Extension)

Pacific Northwest Insect Management Handbook -- This handbook is updated annually and provides control recommendations for a wide range of agricultural pests.  Navigate through the online version by selecting the chapter of interest from the drop-down list at top left.  Spotted wing drosophila is featured in the 2011 Emerging Pest chapter.  Control recommendations are made in the Small Fruit and Tree Fruit chapters.

January 3, 2011
Recommendations for managing SWD in California cherries

Statewide SWD Realtime Mapping - Maps by county for Oregon

SWD Degree Day Phenology Model - Forecasted development of SWD population by degree days

July 18, 2010
Two-page article outlines general management strategies to control SWD in commercial strawberry crops.
May 26, 2011
Set of 10 printable frames with information about Spotted Wing Drosophila
July 16, 2010
Five-page document describing biology, European distribution, symptoms of infestation, monitoring, and control of SWD

Prevention - This is only effective if the pest has not made it to the targeted area. Use sanitation practices to destroy fruit culls. Remove other potential SWD habitat. Promptly remove all non-marketable hanging fruit from your fields. An ounce of prevention is worth a pound of cure.

May 26, 2011
Article provides information about spotted wing drosophila biology, crop damage, monitoring protocols, and backyard management for gardeners and hobbyists.
October 1, 2009
OSU Extension Service document EM8991.pdf Authors: Amy Dreves; Vaughn Walton; Glenn Fisher 2009 OSU Extension Service document describes the basic life cycle of D. suzukii and gives preliminary management strategies, potential horticultural impact, and contact information for research entomologists.

We've compiled a list of the most frequently-used resources, reports, and bulletins used by growers and other affected by SWD.

For Cherry Growers

How to distinguish larvae of spotted wing drosophila from those of cherry fruit fly

This short video explains the design of apple cider vinegar SWD monitoring trap and how to install the trap in the field.