![]() They feed during the nighttime, and spend their days hidden in the plants or under plant debris. They can be found in agricultural fields as well as golf courses and homeowners' backyards. These destructive pests are found east of the Rocky Mountains in the United States and southern Canada, although they have also been found in the extreme southwestern U.S. There can be anywhere from 2 to 3 generations per year, with some areas having 4 if the conditions are favorable. After pupating, they will emerge as moths ready to mate, lay eggs, and continue the cycle. It is in this feeding period that the larvae cause the most destruction. The armyworm larvae will feed during springtime and then pupate for two weeks. Reproduction Patterns of ArmywormsĪrmyworms spend the winter as mature larvae or in a pupal stage amid plant debris or down in the soil itself. Eggs, which are a greenish white color, are laid in large groupings on the undersides of foliage leaves.įirst generation caterpillars cause the most damage in an area but can be prevented by using a caterpillar product, such as Safer ® Brand Caterpillar Killer II With B.T. On each of their front wings, they have a small white dot.Īrmyworm larvae or caterpillars are brownish or greenish in color with dark and light stripes along the length of their bodies. Adult armyworm moths are tan, light brown or grayish-brown in color and have a 1 1/2" - 2" wingspan.
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