The corn earworm is one of the most costly insect pest in the Western hemisphere. It feeds on over 50 cultivated crops including sweet corn, tomatoes, soybeans, and cotton. The caterpillar is found in every state except Alaska and has developed resistance to many insecticides.
The corn earworm is one of the United States' most costly insect pests, regularly costing in excess of $2 billion per year.
American Cotton Bollworm
Tall morning glory
One female moth can lay up to 3,000 eggs in her lifetime. Thus, the number of caterpillars significantly increases in each subsequent generation.
Southern states, which have longer summers, have more corn earworm generations. One-third of the U.S. has 4 or more generations.