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US: Potato late blight update and late-season recommendations for Michigan

Potato late blight has been found in a few more fields in Montcalm County, Newaygo County and in two fields in St. Joseph County in southern Michigan in 2015. Some crops in southern Michigan are now in early decline and ready to be desiccated or already being harvested. The amount of disease is generally light in southern counties. Areas in fields that were vulnerable were field margins, especially those close to tree lines, raised cable lines and where water accumulated, such as around pivot tracks and tractor wheel lines. More