They damage seedlings and transplants by cutting stems a few inches below or just above ground level. They feed mainly at night. Look under clods, rocks, and debris during the daytime. Some climbing species of cutworms feed on buds, leaves, or fruit.
Most destruction occurs during the cooler spring months.
Press the collars into the soil about one to two inches below the soil surface. Cultivating the soil can kill cutworms. Other insecticides are available.