Hello
A brief update on late blight confirmations in Ontario Canada as summarized by Dr. Kutay Ozturk, Extension potato pathologist with the University of Maine.
Late blight was found in Ontario potatoes (Elgin County) and field tomatoes (Kent County).
The strain on the potato infection was found to be US-23. This strain is highly aggressive on tomatoes (foliage and fruit) and potato tubers but less so on potato foliage. On tomatoes, US-23 produces much more sporangia than any other strain, which can be easily spread by wind. Please see the links below for more information:
https://onvegetables.com/2024/07/03/late-blight-update-14/
https://onvegetables.com/2024/07/05/late-blight-update-15/
Regards,
Amanda
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Amanda Gevens
Chair, Professor & Extension Specialist
Administrative Director of the Wisconsin Seed Potato Certification Program
Fritz Friday Chair for Vegetable Production Research
Plant Pathology Department
1630 Linden Drive Room
University of Wisconsin-Madison
Madison, WI 53706
gevens@wisc.edu/608-575-3029
Potato & Vegetable Pathology Research and Extension
https://vegpath.plantpath.wisc.edu/
