April 14: Dr. Jay Stipes, retired professor of tree pathology at Virginia Tech, enthralled members with a seminar on trees, their diseases and some cures. His work included refining the injection of fungicides to combat Dutch elm disease. His "patients" include elms on the National Mall and historic trees at Mount Vernon, Monticello, and Montpellier, as well as on the Capitol grounds.
Tuesday, April 14, 2009
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