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Downy mildew diseases occur on several herbaceous plant species, but they do not typically cause severe problems in Virginia landscapes. In the summer of 2012, however, landscape plantings of common garden impatiens (Impatiens walleriana) (fig. 1) in many parts of Virginia and other eastern states were devastated by a new downy mildew, impatiens downy mildew (fig 2).
Virginia Cooperative Extension materials are available for public use, reprint, or citation without further permission, provided the use includes credit to the author and to Virginia Cooperative Extension, Virginia Tech, and Virginia State University.
Issued in furtherance of Cooperative Extension work, Virginia Polytechnic Institute and State University, Virginia State University, and the U.S. Department of Agriculture cooperating. Edwin J. Jones, Director, Virginia Cooperative Extension, Virginia Tech, Blacksburg; M. Ray McKinnie, Administrator, 1890 Extension Program, Virginia State University, Petersburg.
May 21, 2013