Blightline August 3
No late blight has been reported or confirmed in our region of ND, MN or MB. Late blight has been reported in potatoes in MI and IN. Growers are encouraged to apply a protective fungicide such as chlorothalonil or mancozeb on a 7-10 day schedule, and scout fields for late blight, concentrating in areas that are wet longer such as low areas, near shelterbelts or around pivot wells.
Send suspect samples to us at NDSU for confirmation or denial of late blight. Remember that late blight is a community disease and the potato neighborhood needs to know when late blight is present so it can be fought collectively.
Blightline August 3 (pdf)