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Copper-streptomycin sprays control pear blossom blast
Authors
Richard S. BethellJoseph M. Ogawa
W. Harley English
Robert R. Hansen
Billy T. Manji
Frank J. Schick
Authors Affiliations
Richard S. Bethell is Farm Advisor, El Dorado County, Placerville; Joseph M. Ogawa is Professors, Department of Plant Pathology, University of California, Davis; W. Harley English is Professors, Department of Plant Pathology, University of California, Davis; Robert R. Hansen, formerly Staff Research Associate, U.C., Berkeley, is now a pest management consultant in El Dorado County; Billy T. Manji is Staff Research Associates, Department of Plant Pathology, U.C., Davis; Frank J. Schick is Staff Research Associates, Department of Plant Pathology, U.C., Davis.Publication Information
Hilgardia 31(6):7-9. DOI:10.3733/ca.v031n06p7. June 1977.
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Abstract
Blasting of flower is an occasional problem in California pear orchards. Three common causes of blasted blossoms are boron deficiency, lack of winter chilling, and bacterial infection caused by Pseudomonas syringae van Hall. Bacterial blast is the most damaging and can reduce crops so severely they become unprofitable to harvest.
Bethell R, Ogawa J, English W, Hansen R, Manji B, Schick F. 1977. Copper-streptomycin sprays control pear blossom blast. Hilgardia 31(6):7-9. DOI:10.3733/ca.v031n06p7
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