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Winter injury of fruit trees : an analysis of factors responsible for the 1949-50 winter injury to cherry, peach and apricot trees in the Okanagan Valley of British Columbia with recommendations for the care of injured trees King, Earl Maurice

Abstract

This report contains an analysis of the factors responsible for the 1949-50 winter injury to cherry, peach and apricot trees in the Okanagan Valley of British Columbia, Canada. Included in the report are sections dealing with the history of winter injury, various theories of the causes of winter injury, and a description of the many forms of injury. The non-climatic and climatic factors affecting the intensity of injury are discussed in detail. Recommendations for minimizing the susceptibility of trees to winter injury under Okanagan Valley conditions are included, together with recommendations for the care of trees after injury has occurred. Reports on the relative hardiness of specific stone-fruits are presented in some detail. The report is liberally supplied with tables indicating the extent of crop damage and tree damage in each district of the Okanagan Valley. These tables are based on observations made in over two thousand orchards. The statistical analyses are based on detailed observations carried out in over four hundred orchards. The published literature dealing with winter injury has been freely consulted, and reference is made to many of the important papers dealing with the winter injury complex. A complete bibliography is included.

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