Lep Monitoring Update WBC, CEW, and ECB Updates

Western Bean Cutworm

Western bean cutworm (WBC) traps were set the week of June 13th and the first trap captures were reported for the week of June 20th through June 26th. Reported moth numbers were low in all counties this past week with only three of the 13 counties reporting moths (Figure 1).

Western Bean Cutworm moth map

June 20 – 26, 2022

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Figure 1. Average western bean cutworm (WBC) moths were captured from June 20th through June 26th. The large number indicates the average moth count for the week and the small number in parentheses is the total traps set up in the county.

Corn Earworm

Corn earworm (CEW) (Figure 2) numbers have gone up this past week. Two counties (Putnam and Van Wert) reported averages above 20 moths per trap (Figure 3). Moths are most attracted to silking corn, where eggs are laid and the caterpillars damage developing corn. Corn earworm is more commonly associated as a pest of sweet corn, but it is possible to find CEW in field corn. Monitoring for CEW will continue through August. For more information on corn earworms: https://agcrops.osu.edu/newsletter/corn-newsletter/2019-27/corn-earworm-field-corn-watch-molds

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Figure 2. Corn earworm (CEW) moth with wings folded at rest. Photograph by Jessi Raubenolt.

Corn Earworm moth map

June 20 – 26, 2022

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Figure 3. Average corn earworm (CEW) moths were captured from June 20th through June 26th. The large number indicates the average moth count for the week and the small number in parentheses is the total traps set up in the county.

European Corn Borer

European corn borer (ECB) reported moth numbers remained low over the past week with no reports of ECB-IA and only two counties (Hardin and Muskingum) reporting ECB-NY (Figure 4).

European Corn Borer moth map

June 20 - 26, 2022

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Figure 4. Average European corn borer (ECB) moths were captured from June 20th to June 26th. The first number indicates the average ECB-IA followed by a comma and then the average ECB-NY moth count for the week. The small number in parentheses is the total traps for each species set in each county.

Crop Observation and Recommendation Network

C.O.R.N. Newsletter is a summary of crop observations, related information, and appropriate recommendations for Ohio crop producers and industry. C.O.R.N. Newsletter is produced by the Ohio State University Extension Agronomy Team, state specialists at The Ohio State University and the Ohio Agricultural Research and Development Center (OARDC). C.O.R.N. Newsletter questions are directed to Extension and OARDC state specialists and associates at Ohio State.