Insecticide treatment should begin 8 to 10 days before bloom when an average of five or more moths per night are captured in local light traps or when egg masses found on nearby corn exceed 10 per 100 plants. Repeat treatments at 7-day intervals if moth captures in light traps average 5 to 10. Treat at 5-day intervals if moth captures average 10 to 20, treat every 4 days if captures average 20 to 50, and treat every 3 days if captures exceed 50 moths per night.