When garden plants are found cut off at ground level or just below ground level or if there is considerable leaf damage but no insects are evident, this should serve as a clue for homeowners to check the soil around the base of recently damaged plants. If cutworms are present, they will normally be within the upper 1-3 inches of soil around the base of recently damaged plants. Often the cutworms will be found in a C-shaped position. They will range from to 1 inches in length. Sevin insecticide is registered for cutworm control in both flower and vegetable gardens.
Several formulations are available including dusts, wettable powders, liquid and pelleted bait.
As with any pesticide, use Sevin according to label directions. For an organic method of control, sprinkle diatomaceous earth around transplants you want to protect. This fine, fossilized shell material has microscopic sharp edges that pierce soft bodies and causes them to dehydrate. Apply after a light rain for better effectiveness. If your garden has adequate moisture the Sevin bait will probably provide the best degree of control because the cutworms are attracted away from the plants to the bait to feed.