Copper-streptomycin sprays control pear blossom blast

Bethell, R; Ogawa, J; English, W; Manji, B; Schick, F; Hansen, R

Copper-streptomycin sprays control pear blossom blast

Authors

Richard S. Bethell
Joseph M. Ogawa
W. Harley English
Billy T. Manji
Frank J. Schick
Robert R. Hansen

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; 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; Robert R. Hansen, formerly Staff Research Associate, U.C., Berkeley, is now a pest management consultant in El Dorado County.

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.

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