Potato Extension


Andy Robinson

Potato Extension Agronomist


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Speical edition of the NDSU Potato Blightline

Late blight has been confirmed in a potato sample collected in Pembina County, ND. We do not yet know the genotype of the isolate. Late blight severity values in our area continue to increase and conditions remain favorable for late blight because of the wet conditions and spotty showers. Growers should continue to scout frequently for late blight and apply protectant fungicides on a seven-day schedule, including fields that have been abandoned due to water damage. Scouting is especially important in fields along the Canadian border and in wet fields in northeastern ND and northwestern MN that may be exposed to late blight spore showers. This late blight has the potential to spread to unprotected and abandoned fields near the infected field.
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