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European Corn Borer Emerging (07/12/18)

NDSU Extension Entomology set up a European corn borer (ECB) trap network using pheromone traps to monitor populations in conventional field corn this year.

European Corn Borer Emerging

NDSU Extension Entomology set up a European corn borer (ECB) trap network using pheromone traps to monitor populations in conventional field corn this year. We have 10 trap sites in 10 counties of eastern ND, including Barnes, Cass, Grand Forks, Griggs, Nelson, Ransom, Richland Sargent, Steele and Traill Counties. Last week, the Iowa (or Z-race) of ECB was captured in 3 of the 10 trap sites. Trap catches were very low, < 7 moths per trap per week, in Richland County near Antelope, Sargent County, and Cass County near Casselton. The univoltine Iowa (or Z-race) of ECB is the most predominate ECB in ND that emerges once a year, typically in July. The damage from the univoltine ECB includes eardrop, stalk lodging and reduced corn yields when economic populations of ECB larvae tunnel inside stalks of corn. We will be posting weekly maps of the trapping results for European corn borer moths on the IPM websitesoon. Time to start scouting conventional field corn for ECB egg masses and larvae (more next week).

Thanks to support from the North Dakota Corn Council for the Corn Insect Trapping Network.

jan 5

Janet J. Knodel

Extension Entomologist

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