Windell, Keith . 2000. Bark-Scoring Tools To Repair Tree Grafts. 0024 2372. Missoula, MT: U.S. Department of Agriculture, Forest Service, National Technology and Development Program. 6 p.
Describes tests of powered handtools used to score (cut) bark when repairing tree grafts in Douglas-fir seed orchards. When grafts are incompatible, a wall of corky (suberized) tissue forms between the host tree and the grafted branch. This wall prevents water and nutrients from flowing properly. Narrow cuts in the wall can allow water and nutrients to flow, enabling the grafted branch to survive. Small gasoline-powered chain saws have been used to make these cuts in the past, but they tend to butcher trees and throw chain oil into the cut, preventing it from healing properly. The Missoula Technology and Development Center tested a number of small, powered handtools. The best all-around tool for tree scoring was the Makita cordless chain saw (Model UC120DWA) with several custom modifications. The Black & Decker Wizard with a rotary cutter or 2-inch Arbortech woodcarving blade was a good tool for scoring small-diameter stems.
Keywords: Douglas-fir, evaluation, hand tools, handtools, nurseries, seed orchards, traditional skill, traditional tool
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