First report of powdery mildew of Lactuca sativa (garden lettuce) caused by Golovinomyces cichoracearum in the Pacific Northwest

Dean A. Glawe, Ellen C. S. Duffield

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Abstract

During continuing surveys for powdery mildew fungi in the Pacific Northwest, Golovinomyces cichoracearum was found on Lactuca sativa (garden lettuce) in Seattle, King County, Washington. This paper documents the occurrence of G. cichoracearum on L. sativain the Pacific Northwest with illustrations of the fungus from fresh material.

Keywords

plant disease diagnosis; vegetable pathology; biogeography; Asteraceae



DOI: http://dx.doi.org/10.2509/pnwf.2007.002.005

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