Kansas State University


Extension Entomology

Armyworm in Brome and Rye

— by Dr. Jeff Whitworth and Dr. Holly Davis

We have received several calls and emails relative to armyworms feeding in brome and/or rye fields.  Larvae sampled this week are relatively mature and should finish feeding and pupate within the week.  This larval feeding (defoliation) should not impact a healthy brome stand as they just graze on the foliage.  However, rye that is not growing well may have some stand reduction.  Whether feeding on brome or rye, the larvae we sampled should cease feeding within the next 3-4 days, or less.





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