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Andy Robinson

Potato Extension Agronomist

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Blightline August 26, 2016

The late blight that was been confirmed in a potato sample collected in Pembina County, ND earlier this week is US23 genotype. Surprisingly, no additional fields or locations with late blight have been reported in our area. Conditions remain favorable for late blight because of the cool temperatures 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, in Pembina and Walsh counties 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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