The following information is from Elizabeth Bush with the Virginia Tech Plant Disease Clinic:  Late blight has been confirmed on tomato in Washington, VA by the Virginia Tech Plant Disease Clinic. Potato and tomato growers (especially in the northern part of the Commonwealth) should take precautionary actions and increase scouting. Cool and wet conditions favor development of this disease and fungicide sprays should be in place before the disease is present in a field or garden. For more information on late blight and late blight management refer to the Extension publication available at http://pubs.ext.vt.edu/ANR/ANR-6/ANR-6_pdf.pdf . Late blight was previously identified in Loudoun County, VA on July 22.