Marssonina leaf and twig spot on willow.
Series: Plant diseases; Extension mimeo -- 4043.; Extension mimeo (Washington State University. Cooperative Extension Service) -- 4043.
Publisher: Cooperative Extension Service, College of Agriculture, Washington State University
Published: 1976
Place of publication: Pullman
Language: eng
Notes: Caption title.

"Prepared by Roy M. Davidson, Jr., and Ralph S. Byther."

"EM 4043, May 1976."