| This video (link below) has great information on late blight diagnostics and management, and does a good job of describing details of the biology and life cycle of this disease. Normally, late blight in the north is a rare problem on tomatoes, but what happened in 2009 was very different, and makes for greater potential of recurrence in 2010. |
Here is a link that might be useful: eOrganic Late Blight webinar