Tomato late blight has been confirmed in Elgin County this week. Previous late blight confirmations this season have been in tomatoes in Essex County and on potatoes in the Orangeville area.
See the late blight post from June 24 for fungicide recommendations for tomatoes in Ontario. Information for potato growers can be found in the July 13 post.
Previous 2015 late blight posts: July 14, July 13, June 24
Identifications of late blight genotypes for Ontario are provided by L. Kawchuk, AAFC Lethbridge, Alberta, Canada.