Week 10: Graft-transmissible Diseases

Budwood is the primary inoculum tissue used for most inoculations, but bark and leaves may also be used. Budwood should not be collected during excessively hot weather because some CGTPs in the perimeter branches of field trees can be temporarily inactivated or severely suppressed by heat. When the season changes and temperatures become cooler, however, the pathogen will usually return from its reservoir location in the roots or shaded parts of inner branches.
 

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