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Western Bean Cutworm Moths Are Laying Eggs

Posted: July 24, 2012

Last week we reported that Penn State Extension’s Western Bean Cutworm Monitoring Network is detecting relatively high moth populations.

Last week we reported that Penn State Extension’s Western Bean Cutworm Monitoring Network is detecting relatively high moth populations.  See last week’s newsletter article for more details.  Last year, we caught a total of 350 moths statewide; this year through July 24 we have collected nearly 900 moths in our pheromone traps.  Now we are getting reports of eggs being found in fields and young larvae feeding on tassels.  The most notable populations are up in Potter County, which has detected about 350 moths in one trap.  Please keep your eyes out of populations of western bean cutworm caterpillars in your fields.  They will feed on pollen that collects in the whorls, on tassels tissue, but they do most of their damage inside the husk feeding on developing kernels. We have yet to receive a report of economic damage from this pest species, so we are keen on hearing any reports from folks in the field.  See our webpage for details on this pest and a summary of our trapping efforts for the past two years and we will update this soon with numbers from this year.

Contact Information

John Tooker
  • Extension Specialist
Phone: 814-865-7082