There is some evidence that biological controls may help limit armyworm populations.īecause the pest does not typically cause economic harm, insecticides are not routinely recommended. Due to limited research, it is unclear what strategies work best to control this pest. Wheat head armyworm is not typically a pest that causes economic harm, although sporadic incidents of major economic damage have been reported. However, this pest is generally not an economic concern for most growers. Characteristic damage is indicated by a small hole bored in the base of florets. Feeding on wheat heads at night is most common. Research in Washington by Diana Roberts and colleagues noted up to 35% yield losses due to this insect in spring wheat trials near Davenport. Larvae developing from these eggs then feed on wheat from May into the summer. Moths emerge in the spring months and lay eggs on wheat or barley. Armyworms are moth caterpillars that vary in color (gray or green) with a distinct yellow, white, and brown stripe along the body. Armyworms can be problematic pests in cereal grains.
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