Calag Archive
Calag Archive
Copper-streptomycin sprays control pear blossom blast
Publication Information
California Agriculture 31(6):7-9.
Published June 01, 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.