Potato Extension


Andy Robinson

Potato Extension Agronomist


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Blightline August 6, 2018

No late blight has been reported in ND or MN or MB. Conditions have been favorable for late blight the past few days especially in eastern ND and western MN, and morning dews continue to provide leaf wetness that favors infection. Late blight severity values have reached the late blight severity threshold value of 15 at all locations except Hofflund and Williston. Protectant fungicides should be applied to fields in areas that have reached the threshold value of 15 or greater on a seven day schedule for irrigated fields and a 7 to 10 day schedule for non-irrigated fields.
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