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The first reported SWD has been found in the NY trap network - one female in Ontario County. The trap was collected June 11, 2013 and is part of Greg Loeb's trap network. The NY trap network consists of ~230 traps. As of today, no other trap locations have caught SWD, so this find represents ~0.4% of traps catching SWD. The trap consisted of a bait cup containing whole wheat fermenting dough floating in a drowning solution of (9 parts) apple cider vinegar, (1 part) ethanol, (drop) soap in a clear deli cup. The trap was set a few feet into the wooded edge of a blueberry field. Blueberries in Western NY are starting to color - green with a hint of pink/purple. (554 accumulated GDD, day length 15:14)

Official SWD confirmed 2011 in NY
A female spotted wing drosophila (SWD), serrated ovipositor in the inset. This particular female was collected in 2011 and sent to USDA SEL for confirmation by Faruque Zaman and Dan Gilrein, Suffolk County Cornell Cooperative Extension, Long Island Horticultural Research and Extension Lab. She was the first officially confirmed SWD from NY in 2011.



Guidelines for farmers to protect berry crops from spotted wing drosophila (SWD) were recently published in the NY Berry News. The article, Chemical Control of Spotted Wing Drosophila in Berry Crops, by Loeb et al., outlines key approaches for getting the best results from sprays aimed at protecting berries from SWD infestation.

Blackberry showing SWD infestation
Blackberries severely infested with SWD will hang limp, drip liquid, and dry out on the fruit cluster; inset shows a larva dissected from a blackberry fruit.

Insight on when SWD might be found in NY can be obtained from this 2012 table of SWD trap captures and reports of larvae in fruit that came in from scientists last year. Note, the first trap captures in Suffolk County that occurred in March 2012 are not reflected in the table. In the 2013 growing season, so far there have been no trap captures in Suffolk County. Check the 2013 NY distribution map for more info.

The NY distribution map published in September 2012, based on the reports received. SWD is now presumed distributed throughout NY.


The SWD monitoring trap instructions have been updated. The new pdf is at the same link as the older version, on the SWD Monitoring page. Using the yeast bait in an ampule floating in the apple cider vinegar drowning solution has resulted in increased numbers of fruit fly captures per trap. So far, though, no SWD have been captured in NY. Stay tuned.

SWD male
SWD male, note spot on each wing.


As of June 4, no SWD have been caught in traps in Maine, Rhode Island, Connecticut, New York, or Pennsylvania, in the US, nor in Ontario, Canada, as reported on the weekly Berry Call.

SWD trap in sweet cherry.
SWD trap hung in a sweet cherry orchard; attracting fruit flies in early June, but no SWD, yet.


Scientists at Cornell University have set traps in NY to monitor for the invasive spotted wing drosophila (SWD). As of June 7, 2013 no SWD have been found in any traps. We are posting data directly into a NY distribution map that is linked on Cornell Fruit Resources and NYS IPM websites. The Cornell University SWD team includes Art Agnello, Greg Loeb, Peter Jentsch and me. The Cornell Cooperative Extension team includes Amy Ivy, Bernie Armata, Betsy Burgeson, Dan Gilrein, Dave Thorp, Debbie Breth, Emily Cook, Faruque Zaman, Ginny Carlberg, Jim O'Connell, Jeff Miller, Kat Loeck, Kevin Iungerman, Laura McDermott, Mike Fargione, Paul Hetzler, Sharon Bachman, and Stephanie Mehlenbacher.

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