SWD Updates

[10/12/2018] A blueberry grower in New York tested two different weights of netting to keep SWD out.

[9/6/2018] With the wine grape harvest coming soon, and a recent increase in Spotted Wing Drosophilla (SWD) counts, via our weekly trapping network, growers should be aware of the potential contamination of juice or wine if berries are exposed to SWD just prior to harvest. 

[8/3/2018] Although this week’s SWD adult fly captures remain low at Rosemount, moderate to high catches of adult flies continued at the Hastings, Forest Lake, Waverly and HRC sites. 

[7/27/2018] Since our last report (July 11th), and likely due to the recent heat in mid-July, SWD adults at most trap locations, actually declined, to low to moderate levels in the metro-area trap network. It is now known that SWD does not like the heat during the day (e.g., >85F), and will often “hunker down” at the base of thick canopies (e.g., raspberry, blueberry), or will move to nearby wooded areas to seek shade during the day – especially when the forest shade is adjacent to fruit production fields. 

[7/11/2018] SWD adults, at most trap locations, reflected substantial population growth as of July 3rd. It’s clear that SWD did not take any time off for July 4th and has continued its population growth this week. 

[7/5/2018] SWD adults, at most trap locations, reflected substantial population growth as of July 3rd. With three locations reporting so far, reflecting a range of fruit crops and fruit maturity, we are updating selected locations here.

[6/28/2018] As noted last week, the first SWD adults, collected in Scentry SWD traps this year were first detected June 8-9th, at Rosemount, UMORE Park (Dakota Co.) and near strawberries in SE Minn. (Houston Co.). Since then, as of Wednesday last week, all trap locations in the Metro area were positive, albeit at low levels, with adult numbers ranging from 1-6 SWD/trap. 

[6/22/2018] The first SWD adult flies, detected in Scentry-baited traps, were collected June 8th, at Rosemount (UMORE Park, Dakota Co.), and June 9th near Mabel (Houston Co.) – both with just 1 adult per trap/week.  


[6/7/2018] Researchers from 12 different institutions have published new managment recommendations for SWD in organic berry crops. 

[1/23/2018] The 2018 Midwest Fruit Pest Management Guide is now available to download.