In small gardens, manual collection of the larvae is sufficient for control. Biological Control Several natural enemies attack cutworms. However, none are effective enough to provide reliable control. Applications should be timed to hit the young larvae while they are feeding on the plant leaves or on the soil surface. Applications of granular insecticides directly to the soil are probably the most effective method of controlling this pest.
Baits are more effective when food sources are limited.
If cutworms are found, distribute baits before the crop emerges, especially where cutworms have caused damage before. Treat as soon as possible if seedlings are already present when you notice damage. Other Seedling Pests, Cutworms. In Integrated pest Management for Cole Crops and Lettuce. University of California Publication 3307.