Symptoms
Research in Washington by Diana Roberts and colleagues noted up to 35% yield losses due to this insect in spring wheat trials near Davenport. Feeding on wheat heads at night is most common. Characteristic damage is indicated by a small hole bored in the base of florets. However, this pest is generally not an economic concern for most growers.
Prevention
Wheat head armyworm is not typically a pest that causes economic harm, although sporadic indicents of major economic damage have been reported. Due to limited research, it is unclear what strategies work best to control this pest. There is some evidence that biological controls may help limit armyworm populations.
Management
Because the pest does not typically cause economic harm, insecticides are not routinely recommended. Sampling can be done with a sweep net or traps if armyworm populations need to be monitored.


