An armyworm is a type of destructive caterpillar that is known for feeding on turf grasses most commonly, Bermuda and Fescue. Armyworms are particularly harmful to grass as they feed quickly and are able to destroy lawns or fields within just hours. 

Once armyworms mature they metamorphize into moths that can lay hundreds of eggs in a singular night. The moths typically lay their eggs in upright locations such as fences, or even grass blades. Once the eggs hatch they begin feeding immediately can devastate turf grass quickly due to their large numbers.