Agriculture and Agri-Food Canada have confirmed the diagnosis of late blight on tomato plants from Chatham-Kent. Several new reports of late blight have been coming in from nearby states as well this week as conditions have become more favourable for the disease. Tomato growers in Chatham-Kent and other regions of southern Ontario should monitor their fields closely, although growers following a recommended fungicide program for early blight, septoria leaf spot, and anthracnose, do have a level of protection with most of the common fungicides. See the August 21 update for information on recommended fungicides.
Recent US late blight reports:
- August 22 – Washington County, NY (tomato)
- August 22 – New Haven County, CT (tomato)
- August 21 – Fulton County, NY (tomato)
- August 21 – Tompkins County, NY (tomato)
- August 20 – Ulster County, NY (tomato)
- August 16 – Centre County, PA (potato)