Late blight update – July 21

Late blight foliar lesion

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.

One thought on “Late blight update – July 21”

  1. Treated my tomatoes with copper in early July and they recovered nicely
    ! I think it is important that the plant is not getting wet when watering, also not to water at night. AUSSI sea minerals are essential.
    Maria, Elgin Ont

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