For all you home gardeners: a recent New York Times article warns of a tomato fungus that is spreading quickly throughout the Northeast and mid-Atlantic. The article recommends that home gardeners watch for development of “late blight signs, which include white, powdery spores; large olive green or brown spots on leaves; and brown or open lesions on the stems.”  Authorities recommend that you spray unaffected plants with an anti-fungal spray, however, affected plants should be removed with their surrounding soil and disposed of (not composted).
http://www.nytimes.com/2009/07/18/nyregion/18tomatoes.html