Late blight has been detected on a few potato plants in one field in Elgin county.
Recent weather has been conducive for disease with consistent rains and mild overnight temperatures. If you haven’t already applied a late blight specific fungicide, you should do so now. Ensure new growth remains protected. Visit the Ontario Crop Protection Hub to view registered late blight specific products on potatoes and tomatoes.
Review the potato late blight entry in Ontario CropIPM to refresh yourself on what late blight infection looks like. The tomato late blight entry can be found at this link.
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