Volunteer potato plants are emerging in North Dakota and have been found in soybean and corn fields. Volunteer potatoes are a susceptible host for late blight, because they are not continually treated with fungicides. How can you control volunteer potato plants? In soybean herbicides such as Reflex (fomesafen), Raptor (imazamox), Roundup (glyphosate), and/or Clairty (dicamba) are the best options, depending on the soybean trait tolerance. Multiple treatments may need to be applied as volunteer potatoes likely will not be completely killed with one herbicide treatment. For control options in other crops the following article from Pam Hutchinson, Potato Cropping Systems Weed Scientist, University of Idaho has some good information Volunteer Potato Control Recommendations.