This publication explains why pruning is an especially important disease-management tool for organic tree fruit growers. It explains how to remove diseased wood and prune branches and discusses how this can control spread of disease and help prevent hosting of pathogens that cause rot. Pruning strategies for apples and pears are contrasted with techniques used for other stone fruits, such as plums, peaches, and cherries.
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External Link
https://attra.ncat.org/publication/pruning-for-organic-management-of-fruit-tree-diseases/