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Identifying Fall Armyworms Adult moths are ash-gray and about 1 ½-inches wide. The front wings are smaller and gray and brown, while the back wings are larger and white with a brown edge.
When those eggs hatch, that’s when the damage begins. Fall armyworms lay eggs in Kansas usually in July, and continues to reproduce through August and September.
From Virginia to Ohio to Michigan, armyworms are chomping through grass across the country. Here's how to save yours. Armyworms are eating lawns overnight: Experts share the best grass treatments
African armyworms primarily lay their eggs in clusters on the lower side of leaves. Their eggs are relatively small at 0.5 mm in diameter. They are white when first laid, but will turn black prior to hatching. [9] The eggs hatch into larvae within two to five days. [11]
Armyworms earned their common name by eating all plant matter they encounter in their wide dispersals, like a large army. A few sweet corn varieties have partial, but not complete, resistance to armyworms. [6] The resistance comes from a unique 33-kD proteinase that the corn produces when it is being fed on by fall armyworms or other larvae ...
[2] [3] They are known as armyworms because the caterpillars move in lines as a massive group, like an army, from field to field, damaging crops. [4] The true armyworm has a distinct migration pattern in which they travel north in the spring and south in the fall to ensure that mating occurs in a favorable environment in the summer. [5]