Potato Extension


Andy Robinson

Potato Extension Agronomist


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Blightline July 16, 2018

No late blight has been reported in ND or MN or MB. Late blight has been reported in the Columbia Basin in Washington. Late blight severity values continue to increase and all locations except four – Hofflund, Linton, Mandan, Williston - have reached the late blight severity threshold value of 15. At this value, conditions for late blight have been favorable and disease is expected to occur if inoculum is present. Protectant fungicides should be applied to fields in areas that have reached the threshold value of 15 or greater.
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