Disease Late Blight Pest Management Tomatoes

US late blight reports

To date, no late blight has been reported in Ontario.

Here is a chronology of late blight reports from the US Northeast so far this spring.  Note that in most cases, these are reports of symptoms being found on a small number of plants in one location, unless otherwise noted.  When a small number of plants are involved, they are generally destroyed after sampling and the remaining plants are treated to reduce the risk of spread.

June 28 – Long Island, New York – 3 tomato fields, 2 potato fields all in close proximity

June 28 – Virginia – late blight reported in potato

June 28 – Delaware – late blight reported on two potato plants in a difficult to spray part of the field

May 12 – Michigan – late blight reported in one potato field

May 9 – Maine – late blight reported at one location – volunteer tomatoes in a greenhouse

April 22 – Connecticut – late blight reported on potato and tomato in a greenhouse

Here are two websites where you can track late blight reports:

http://blogs.cornell.edu/lateblight/

http://usablight.org/

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