VegNet Regional Pest Trends for the Week of August 29th, 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: We have noticed a surge in Diamondback Moth (Plutella xylostella - DBM) activity, probably due to recent warm temperatures. Monitor fields closely over the next few weeks, and scout for characteristic ‘window-paning’ damage.
  • Western Spotted Cucumber Beetle (Diabrotica undecimpunctata undecimpunctata - 12S) populations have been on the rise since 2014, and beetles are very abundant this year (FIG. 1). The increase we are seeing now is from the second summer generation, which emerges from the soil in August through October. Some adults from this 2nd generation will overwinter. If there is concern about 12S activity within a specific field, sweep netting is recommended.