GardenTech® brand offers several highly effective products that kill cutworms by contact and keep protecting for up to three months*. Sevin® Insect Killer Granules reach cutworms above and below the soil line. … Work the granules into the top 4 to 6 inches of soil before planting or as soon as plants emerge.

What kills cutworms naturally?

Cornmeal. You can also sprinkle cornmeal on the soil right around the plant’s stalk. Cutworms tend to avoid cornmeal as it’s a natural pesticide to them. If they eat it, they’ll die.

Will malathion kill cutworms?

Hi-Yield 55% Malathion Insecticide Spray is not labeled for cutworms. Bonide Eight Insect Control Vegetable, Fruit and Flower would be a great option for cutworms on tomato plants.