Report spotted wing drosophila to the Minnesota Department of Agriculture (MDA) via Arrest the Pest. Remember that we will need a good picture or specimen of an adult fly in order to confirm reports. All reports will be displayed at the county level, so that specific locations with spotted wing drosophila activity will not be apparent.
Update for the week of August 19:
SWD activity was not found in any new counties this week.
Update for the week of August 12:
SWD activity was confirmed in Pine County this week.
Update for the week of August 5:
SWD activity was not confirmed in any new counties this week.
Update for the week of July 29:
SWD activity was confirmed in the following counties this week: Benton, Carlton and Fillmore.
Update for the week of July 22:
SWD activity was confirmed in the following counties this week: Carver, Clearwater, Crow Wing, Isanti, McLeod, Mille Lacs, Olmsted, Roseau and St Louis.
Update for the week of July 15:
SWD activity was confirmed in the following counties this week: Aitkin, Cass and Winona.
Update for the week of July 8:
SWD numbers continue to increase and activity was confirmed in the following counties this week: Hennepin, Meeker, Olmsted, Pipestone, Ramsey, Scott and Sherburne
Update for the week of July 1:
SWD was confirmed in Douglas, Murray, Rock and Stearns Counties this week. Also, the U of M reports significant increases in catches again this week at sites in Anoka, Dakota, Houston and Washington Counties.
Update for the week of June 24:
SWD has been confirmed in Houston County in addition to the four counties reported last week. SWD was also reported in Sherburne and Ramsey Counties. The U of M reports significant increases in catches at some sites including Houston, Dakota and Wright Counties.
Update for the week of June 17:
The University of Minnesota confirmed spotted wing drosophila activity this week in Waverly (Wright County), Rosemount (Dakota County), Forest Lake (Washington County) and Northfield (Rice County). This is about 10 days earlier than the first finds in 2015.
Update for the week of June 10:
A few traps have come in to MDA, no SWD have been detected as of yet.
U of M SWD 2016 Monitoring
To access map legend, click on double arrows in upper left corner. Click on counties for more information.
Summary from 2015:
63 volunteers from 44 counties participated in the SWD survey during 2015. These volunteers were responsible for confirmation of SWD activity in 13 counties. SWD activity in an additional 3 counties was confirmed through other survey work and 7 counties were confirmed through reports to "Arrest the Pest". SWD activity was reported in an additional 8 counties but could not be confirmed by the MDA.
The first confirmation of the summer was made by the University of Minnesota in Dakota and Washington Counties during the week of June 23. Rock County was also reported around this same time. The latest confirmation of the year was during the week of August 19 from Houston County.
Last Updated: August 19, 2016