SWD Updates

[8/30/2019]  As we approach wine grape harvest in the next 2-3 weeks, growers should remain vigilant in monitoring SWD (ideally, using traps located at on-farm vineyards), and if flies are present (e.g., trap catch >10 flies/week), consider using one of 4 alternating insecticides prior to harvest (e.g., Delegate or Entrust [organic-certified], Mustang Maxx, and Malathion). Read the entire article here

[8/16/2019] Spotted-wing Drosophila (SWD) trap catches continue to remain very high in all on-farm and research locations monitored. Read the entire article here

[8/9/2019] Spotted-wing Drosophila (SWD) trap catches continue to remain very high in all on-farm and research locations monitored, especially the past 2 weeks. Read the article here.

[7/25/2019] Since July 8th and during the past week, SWD numbers for traps located in berry crops (mostly blueberry, summer raspberry) increased substantially. 

[7/18/19] Since July 8th and during the past week, SWD numbers for traps located in berry crops (mostly blueberry, summer raspberry) increased substantially – up to 191 and 176/wk at Forest Lake and the HRC-Arboretum, respectively. 

[7/3/2019] SWD activity is increasing across the state!

[5/13/2019] Local raspberry farmers lose an estimated $2.3 million in annual sales to spotted wing drosophila. Researchers funded by the Minnesota Invasive Terrestrial Plants & Pests Center (MITPPC) used local grower surveys in combination with field research and USDA census data to evaluate the economic impact of the state raspberry industry’s most significant pest.

[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. 

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