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Integrated Insect and Mite Management in Washington’s Small Fruit Production


The Spotted Wing Drosophila (SWD), Drosophila suzukii, is a soft fruit pest, is originally from Asia, and is in the same genus as other species commonly known as fruit flies. SWD were discovered in California in 2008 and in Washington and Oregon in 2009.

SWD are distinguished from other fruit pests in that they lay their eggs in healthy fruit that are still attached to the plants. SWD are able to quickly destroy soft fruit such as blueberry, raspberry, strawberry, currant, plum, peach, cherry and grape due to their very rapid reproductive cycles. Depending on environmental conditions, 4 – 10 generations can hatch per season in the Northwest.

The small fruit research program at WSU Mount Vernon NWREC has been conducting laboratory screening studies to evaluate registered insecticides for small fruits to determine their effectiveness to control SWD all season long. Our research goals are to also provide growers with IPM tools that include monitoring techniques (traps, pheromones, scouting), timing of insecticide applications based on plant/pest life cycles, and improved insecticide placement and application techniques.

2013 SWD Management Updates


PowerPoint Presentations

All photographs are copyrighted by the author

All photographs are copyrighted by the author


Spotted Wing Drosophila (SWD) Monitoring, Identifying, and Fruit Sampling

Image of SWD life cycle

SWD Life Cycle

Photo of SWD ovipositor

SWD ovipositor

Image of WA 2010 SWD distribution map

SWD Washington State
Distribution Map
, August 2010

Image ofNAPIS US SWD distribution map

SWD United States Distribution Map(only represents pest survey data submitted by participating states)

Image of World SWD distribution map August 2010

SWD World Distribution Map, August 2010