Twenty-six sites reported this week. European corn borer (ECB)-E was caught at 1 site and ECB-Z was also caught at 9 sites. Corn earworm was caught at 25 sites, with all 25 sites showing counts high enough to warrant a 3, 4, 5, or 6-day spray schedule (refer to the table below).  Fall armyworm (FAW) was caught at 4 sites, and Western bean cutworm (WBC) was caught at 4 sites.

CEW were caught in high enough numbers in all of the 20 sites reporting trap catches to drive the spray schedule. Those sprays should also control the other worm pests. However, sprays are not required for fields that are within a week of harvest. Also if daily maximum temperatures are less than 80° F for the previous 2-3 days then add one day to the recommended spray interval.

Average sweet corn trap catches from 5.30.23– 9.12.23.

Table showing trap catch for 9.5.23 – 9.12.23.

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