Late blight update

Previous 2014 late blight updates: August 8July 29July 25July 13, July 3.

Late blight has been confirmed on tomatoes in Elgin County, Chatham-Kent, and the Regional Municipality of Waterloo. Credible reports have also been received from other areas, including the United Counties of Stormont, Dundas and Glengarry, Middlesex, and Perth County.

Recent weather has been conducive to the development and spread of late blight.  Commercial growers should scout often and ensure they are using fungicides with good late blight activity in their fungicide program.  When late blight is in the area, spray intervals should be shortened.

Know the symptoms. See the Tomato Late Blight Photo Gallery and refer to Late Blight Look-Alikes for photos of late blight and possible look-alikes on tomato.

See the late blight post from July 29 for fungicide recommendations for tomatoes in Ontario.

Contact OMAFRA at 519-674-1690 or janice.leboeuf@ontario.ca if you suspect you have found late blight in Ontario.

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