July 24, 2013 – Spotted wing drosophila (SWD) raps are located at 68 sites across Ontario. The first trap catch was collected in crops grown in protected culture the week of June 28 – July 4, in Niagara region. As of July 19, SWD has also been trapped in the field in Norfolk, Haldimand, Durham and Niagara region, in wild hosts or in crops such as sweet cherry and raspberry.
Although numbers are still very low, it is important now to protect berry crops and susceptible tender fruit as they are ripening and throughout harvest. A generation of SWD can occur in eight to 10 days and numbers will increase very rapidly. Insecticides should be applied every seven to 10 days depending on the weather and population pressure. In addition, raspberries should be harvested on a very tight schedule and cooled immediately after harvest. READ MORE
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