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Diseases of  Alfalfa  Corn  Soybeans  Wheat

Insect Pests of  Alfalfa  Corn  Soybeans  Wheat

Weeds  Identify  Monocots  Dicots  Grasses  Sedges  Lilies  Broadleaf

Scout Info
Kentucky IPM Pest Information Pages

Fall Armyworm: Kentucky Corn IPM

Fall Armyworm


Larvae vary from light tan to nearly black with three thin light yellow lines down the back. There is a wider dark stripe and a wavy yellow red splotched stripe on each side. They resemble both armyworms and corn earworms but fall armyworms have a prominent white inverted Y mark on the front of the head. The spherical gray eggs are laid in clusters of about 150, usually on the leaves of host plants. Egg masses are covered with a coating of moth scales or fine bristles.


Windowpane Damage
Damage to ear
Larvae feed on the leaves leaving "window pane" type damage and later burrow deep into the whorl. The tassel, leaves on the upper portion of the plant, and the ear may be partly or totally destroyed. The damage to the ear of corn may be far more important than the leaf damage. This insect can be a problem in the south following a cold, wet spring. FAW migrate north since they cannot overwinter in the northern states. Other hosts include sorghum and other grasses.

Pest Activity

Fall Armyworm Activity

Please note: These dates are approximations only. This calendar was constructed using data from Kentucky, USA. These dates may not apply in your area. You may wish to contact your county extension agent or agricultural consultant for information tailored to your locality.

IPM Techniques and Scouting Procedures

This site was created and is maintained by Pat Dillon, Department of Entomology, University of Kentucky, S-225 Agricultural Science Ctr North, Lexington, KY USA  40546-0091 (phone: 859/257-3571). Please send questions or suggestions to: pdillon@uky.edu