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European Corn Borer Trap Update (07/30/20)

Trap catches for the univoltine Z-race European corn borer (ECB) moth continue to decline for the second week in a row, with an average of 8 moths per trap per week compared to 9 moths per trap per week last week and 45 moths per trap per week 2 weeks ago (see trapping map).

Trap catches for the univoltine Z-race European corn borer (ECB) moth continue to decline for the second week in a row, with an average of 8 moths per trap per week compared to 9 moths per trap per week last week and 45 moths per trap per week 2 weeks ago (see trapping map). Only one bivoltine E-race ECB moth was captured at each of two sites: Gwinner, Sargent County and Sheldon, Ransom County. Crop stages ranged from R1 (silking) to R2 (blister) in southeastern North Dakota.

Continue scouting for ECB egg masses and larval feeding/tunneling in non-Bt field corn. Please see Crop and Pest Report (Issue 10, 07-09-20) for more information on scouting and the Economic Threshold.

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Janet J. Knodel

Extension Entomologist

 

Veronica Calles-Torrez

Post-doctoral Scientist

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