VegNet Regional Pest Trends for the Week of September 19th, 2016

VegNet is an insect pest monitoring program funded by the Oregon Processed Vegetable Commission and managed by the Oregon State University Department of Horticulture. To add your name to this newsletter, please click the ‘subscribe’ button on the homepage. For a review on how to interpret VegNet tables, click here.

  • ALERT: The recent surge in Diamondback Moth (Plutella xylostella - DBM) activity is of particular concern, not only for cauliflower growers, but fall and winter brassicas as well.  We encourage continued monitoring because DBM can overwinter in crop debris and/or move to surrounding fall seeded brassica fields. This, combined with migration from southern latitudes each spring, increases the potential for populations to build up.
  • Twelve-spot beetles (Diabrotica undecimpunctata undecimpunctata - 12S) are very abundant again this week. Newly emerged females will be mating, and a proportion of these ‘pregnant’ females will overwinter. Because 12S activity has been so high this year, it is likely they will be a problem early next spring.
  • Winter cutworm moths have been spotted, and we will be increasing sampling efforts over the next few weeks. Check out my research blog for more info: blogs.oregonstate.edu/cutworm