Black Cutworm Threshold for Damage: 2% to 3% cut plants and larvae under 3/4” long; 5% cut plants for larger larvae.

Fall Armyworm Threshold for Damage: 5% of plants with an egg mass or 25% of plants show damage symptoms and live larvae are present.

Corn Earworm Threshold for Damage: 2.5% average yield loss annually. Range of 1.5% to 16.7%.