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Watch for Armyworm and Black Cutworm Larvae in Any Fields That Have Been Planted

May 10, 2002
We have reported captures of several species of moths in the past several issues of the Bulletin. However, at this time, with corn still to be planted in many areas, it's almost an overstatement to suggest that people should watch for armyworms and black cutworms as soon as corn seedlings emerge. Both species will be large enough to cause noticeable injury to corn seedlings very soon. For an update on captures of moths in southern Illinois, refer to "The Hines Report" at You'll learn that Ron Hines, senior research specialist at the University of Illinois Dixon Springs Agricultural Center, has found small (1/4- to 1/2-inch-long) armyworm larvae in grass hay fields. I suspect you can find armyworm larvae in wheat right now, too. Numbers of armyworm larvae encountered thus far have been small. However, after some recent heavy flights of armyworm moths, the numbers of larvae could increase in some areas.

Check in previous issues of the Bulletin for scouting tips, thresholds, and suggested insecticides for control of both armyworms and black cutworms.--Kevin Steffey

Author: Kevin Steffey

The Pest Management and Crop Development Bulletin
Executive Editor: Kevin Steffey, Extension Entomologist

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