Kate Everts, Vegetable Pathologist, University of Delaware and University of Maryland; keverts@umd.edu
Currently there are no confirmed reports of late blight on either tomato or potato outside of Florida. However, there is one unconfirmed report of a tomato greenhouse outbreak in Berkeley Springs, West Virginia. Until this report is confirmed, the potato crop should continue to be protected with a preventative application of mancozeb or chlorothalonil. In addition, tomatoes in the proximity of the potential outbreak area should also be protected.