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Armyworm Defoliating Young Corn

Marlin Rice (June, 2004)

Summary

The adult moths migrate from the southern United States and are attracted to fields that were planted into a cover crop such as rye, or where grassy weeds exist. Their young larvae feeds on these plants. After consuming the rye or grass (or if the grass is killed with a herbicide), the larvae move onto the corn. This publication suggests treatment thresholds.