Michelle Grabowski, University of Minnesota Extension Educator
Earlier this year we warned gardeners to be on the look out for downy mildew on impatiens. As we anticipated the downy mildew pathogen is here in Minnesota and many gardeners are now observing symptoms of this disease. Impatiens that have yellow lower leaves or look like naked stems due to leaf drop should be closely inspected. Downy white growth on the lower surface of the leaves can be used to confirm the disease. For more information about downy mildew on impatiens visit our previous disease alert.