Open AccessFirst Report of Powdery Mildew of Hypericum perforatum (St. John's-wort) Caused by an Anamorphic Microsphaera Species in the Pacific Northwest
Author(s) -
Dean A. Glawe
Publication year - 2004
Publication title -
plant health progress
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.565
H-Index - 9
ISSN - 1535-1025
DOI - 10.1094/php-2004-0707-01-hn
Subject(s) - powdery mildew , hypericum perforatum , biology , herb , botany , fungus , medicinal herbs , traditional medicine , medicine , pharmacology
St. John's-wort has been valued as a medicinal herb for centuries. During the 2002 growing season a specimen plant with powdery mildew symptoms was observed in a demonstration garden in Kenmore, King County, WA. This report provides information on symptoms of the disease, morphological features useful in characterizing the causal agent, and taxonomic aspects of the fungus. Accepted for publication 30 June 2004. Published 07 July 2004.