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Remove cool-season weeds along field edges (e.g.Consider treatment if large numbers of overwintering cutworms are observed. Pheromone traps can be used to monitor adult male moths.Ĭutworms infestations are sporadic.Later in the season, monitor plants for foliage damage.Look for wilted plants that may indicate stem feeding injury.Look for seedlings (especially beans) cut off near the soil and use a trowel to look for larvae in the soil nearby.Larvae can be seen as early as late January into April.Overwinter as larvae in the soil or under plant debris.Ĭutworms are most active and cause the most damage during spring and early summer months.

One generation of army, pale western, and glassy cutworms per year.

Two overlapping generations of black and variegated cutworms per year.

Cutworms notably curl into a 'C' when they are distrubed. Larvae are dull gray to brown (depending on the species). Later in the season, fruit and foliage may be damaged. Larvae feed with chewing mouthparts and can clip off seedlings at the soil line reducing stands.

Western Bean Cutworm (Loxagrotis albicosta).

Pale Western Cutworm (Agrotis orthogonia).

Cutworms can cause severe damage during outbreak period.Įxamples of common cutworm species found in Utah include:

These insects belong to a large group of night-flying moths in the family Noctuidae. Barriers Used to Protect Plants from Cutworms HOSTSĬutworms can be found all over the United States, with various species found in Utah.