PMN Crop News Homepage   

Posted 31 August 2015. PMN Crop News.

Fall Armyworms Marching Across Pastures, Lawns, Soybeans

Source: University of Arkansas Press Release.

Conway, Arkansas (August 19, 2015)--Fall armyworms are on the march again, making lawns and pastures seem to disappear overnight.


Kami Marsh, Faulkner County extension agent for the University of Arkansas System Division of Agriculture, spent a good part of Monday fielding calls about this annual caterpillar plague.

“Anyone with a lawn, plus cattle and hay producers, should be scouting for these worms,” Marsh said. “They will feed on a variety of forage crops, but often prefer lush bermudagrass.”

Morning and evening are the best times to scout for fall armyworms, since those are the times they are most active.

Newly hatched fall armyworms are light green or cream-colored with a dark head and measures about one-sixteenth of an inch long. As it grows, it becomes darker in color and the head has a light colored “Y”-shaped mark down the front. In addition, the next-to-last abdominal segment has four small dark dots. A fully grown fall army worm is about 1.5 inches long.

For more information on controlling armyworms in pastures, see Extension fact sheet FSA 7083 Managing Armyworms in Pastures and Hayfields.