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Arboriculture & Urban Forestry Online
Volume 14, Issue 11 — November 1988
https://www.isa-arbor.com/Publications/Arboriculture-Urban-Forestry

Closure of Branch Pruning Wounds with Conventional and 'Shigo' Cuts    (View PDF)

Dan Neely

Abstract: Closure rates on pruning cuts through the branch collar (conventional) and away from the branch collar ('Shigo') were compared on Quercus palustris, Platanus occidentalis, and Acer platanoides for 4 years. The severed branches (4 per tree, 10 trees per species per year) were 25 to 35 mm in diameter. Depending on species, 'Shigo'-cut wounds were 4 to 6 percent wider than the diameter of the branch; conventional-cut wounds were 32 to 51 percent wider. Wound calluses around conventional cuts grew much faster than calluses around 'Shigo' cuts (14.8 vs. 8.1 mm the first year, 17.8 vs. 12.6 mm the second year). After one growing season the amount of wood exposed on conventional and 'Shigo' branch wounds was approximately equal even though the conventional cuts were originally much larger. After the second growing season, more conventional cuts than 'Shigo' cuts were fully closed.

Keywords:

https://doi.org/10.48044/jauf.1988.062


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