Late blight has been found in a North Dakota potato field.

The find was made the week of June 21 in Dickey County, in the southeastern part of the state, according to a news release from the East Grand Forks, Minn.-based Northern Plains Potato Growers Association.

It’s the earliest in the season late blight has been found in North Dakota since 1994. Late blight also was found in a Michigan field the week of June 14.

Late blight is a highly destructive fungal disease that attacks both tubers and plant foliage at any stage of development, and it can spread quickly.