Wednesday, April 7, 2010
For Help Controlling the SWD
Oregon State University's horticulture, crop and soil science and integrated plant protection department's have taken the lead in monitoring the spotted wing Drosophila (SWD) in Oregon and finding a way to control it. An informational Web site on the pest for the public can be found at http://swd.hort.oregonstate.edu.
What fruit does SWD attack?
Blueberries, strawberries, grapes, raspberries, cold hardy kiwi fruit, tomatoes, cherries, peaches and others.
What's SWD look like?
Adults are small (2-3 mm) flies with red eyes, a pale brown thorax and abdomen with black stripes. Adult males have a black spot towards the tip of each wing.
How can I tell if my fruit is infested?
When fruit ripens, collect approximately 30 to 50 fruit randomly collected from suspected infected area.
Place in sealable bag, lightly crush. Add sugar water solution to fill bag halfway. Maggots will drift to top of solution. These can be seen with a magnifying glass.
How do I manage the flies?
Recommendations to best suppress fly populations are still under development. But two key components for protecting a crop are controlling the bugs before they lay eggs, and reducing breeding sites by removing and disposing of infested or leftover fruit on the plant. Certain insecticides can also be used on fruit flies.
For questions, to report SWD infestations, or for a schedule of upcoming SWD presentation workshops, contact Polk County Extension Service at 503-623-8395.