To date, there are no confirmed cases of late blight in Ontario, but the disease has been spreading in neighbouring states.  Here’s a summary of the most recent reports in the Northeast US from http://usablight.org/:

  • August 12 – Wayne County, Ohio – tomato
  • August 11 – Wayne County, New York – potato
  • August 9 – Onondaga County, New York – tomato (US-23)
  • August 9 – Wayne County, Ohio – tomato
  • August 9 – Wyoming County, New York – potato
  • August 8 – Westchester County, New York – tomato
  • August 7 – Franklin County, Massachusetts – tomato
  • August 6 – Franklin County, Massachusetts – tomato
  • August 6 – Middlesex County, Massachusetts – tomato
  • August 6 – Aroostook County, Maine – potato
  • August 5 – St. Joseph County, Michigan – potato (http://msue.anr.msu.edu)
  • August 5 – Kalmazoo County, Michigan – tomato (US-23) (http://msue.anr.msu.edu)
  • August 5 – Steuben County, New York – potato (US-23)
  • August 5 – Providence County, Rhode Island – tomato (US-23)
  • August 4 – Wayne County, Ohio – tomato
  • August 4 – Middlesex County, Massachusetts – tomato
  • August 3 – Seneca County, New York – tomato
  • August 2 – Onondaga County, New York – tomato
  • August 2 – Wyoming County, New York – tomato (US-23)
  • August 2 – Allegany County, New York – tomato (US-23)
  • August 1 – Wayne County, Ohio – potato (US-23)
  • August 1 – Schuyler County, New York – potato, tomato (US-23)
  • August 1 – St. Lawrence County, New York – tomato
  •  July 31 – Aroostook County, Maine – potato
  • July 31 – Wayne County, Ohio – tomato (US-23)
  • July 30 – Wayne County, Ohio – tomato (US-23)
  • July 30 – Allegheny County, Pennsylvania – tomato (US-23)
  • July 29 – Wayne County, Ohio – potato (US-23)
  • Late blight has also been confirmed in Wisconsin (July 3, potato and tomato), Vermont (July 23, potato) and several states further south.

For information on late blight management and identification, see the July 18 Late Blight Update.

2013 late blight reports from the US Northeast (usablight.org)
2013 late blight reports from the US Northeast (image from www.usablight.org)

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