purple blotch (Alternaria porri ) on garden onion (Allium cepa ) - 5362925

purple blotch
Alternaria porri (Ellis) Cif.

Host: garden onion (Allium cepa L.)
Descriptor: Research
Description: A volunteer onion plant with the purple blocth disease caused by Alternaria porri in a winter wheat field
Image type: Field
Image view: Identifying Feature
Image location: United States

Photographer Information

Name: Howard F. Schwartz
Organization: Colorado State University
Country: United States

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Image Number: 5362925

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Image Citation:(?) Howard F. Schwartz, Colorado State University, Bugwood.org

Node Affiliation: Colorado State University

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Image uploaded on Friday, February 01, 2008
Image Information last updated on Sunday, February 24, 2008