First Report of Plasmopara halstedii on Perennial Black-Eyed Susan in North Florida

Abstract

In August 2003, the Florida Extension Plant Diagnostic Clinic in Quincy, FL, received a perennial black-eyed-susan (orange coneflower) plant exhibiting symptoms of downy mildew. Nearly all of approximately 0.2 hectares of potted plants grown by a nursery were symptomatic. Downy mildew has not been previously reported on perennial black-eyed-susan in Florida.Accepted for publication 2 January 2004. Published 19 January 2004.