McQuilkan. 1950. Effects of some growth regulators and dressings on the healing of tree wounds.
Great story about the US military testing various wound dressings on tree pruning scars. After their multitude of treatments on multitude of scars, it's safe to say nothing is required to apply to a tree wound if it is pruned correctly. Just fertilize reguarly after pruning and the scar heals in 12-24 months depending on size.
McQuilkan1950WoundDressnigTreatments.pdf
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