Late-Season Corn Earworm Alert: Focus on Sweet Corn

September 3, 2019

Bill Hutchison, Eric Burkness & Suzanne Wold-Burkness

As noted in mid-August, corn earworm moth flights usually do not increase substantially until late summer, and throughout September. Consequently, only the latest maturing hybrids, or late-planted sweet corn is more vulnerable to egg-lay and larval infestations in ear tips.

This past week, our trap network cooperators observed a substantial increase in moth counts in south-central and southeastern Minnesota. Moth numbers at these locations are much higher than our standard “action threshold” of  >5 moths per night for at least two consecutive nights (measured via pheromone traps). Read the entire article here