European Corn Borer

Currently we have accumulated 956 modified growing degree days as of July 21, 2022. We expected the peak moth flight to occur between 700 and 900 modified growing degree days. Typically, peak egg laying will correspond to peak moth flight.  At this point it appears that peak moth flight may have come and gone with only a minimal activity being detected this year as the most moths collected from any single trap in a seven day period was only five moths. There may be pockets of elevated activity within the growing area, however, we have not detected any significant activity at this point in time.

Recommended Economic Threshold:

  • 60 moths in a 7-day period in a pheromone trap
  • 120 moths in a 7-day period in a black light trap
  • 1 eggmass per 15 plants surveyed