Tree Growth Regulators Reduce Line Clearance Trimming Time    (View PDF)

Mark P. Mann, Harvey A. Holt, William R. Chaney, Walter L. Mills, and Rita L. McKenzie

Abstract: Untreated silver maples (Acersaccharinum) and trees that were trunk injected with the tree growth regulator (TGR) paclobutrazol in northern Indiana were matched according to crown size, trim type, and number of overhead conductors. Trim time and total job site time for TGR-treated and untreated trees within four trimming regimes (single phase side trim or V-trim and three phase side trim or V-trim) were recorded for each tree. Trim time for TGR-treated trees side trimmed was not significantly reduced for either single phase or three phase lines. Trim time for V-trimmed TGR-treated trees was reduced significantly for both single phase and three phase lines (36% and 48%, respectively). Total job site time was not reduced significantly for TGR-treated trees either side trimmed or V-trimmed around single phase lines. However, total job site time for side trims and V-trims of TGR-treated trees was reduced significantly (25% and 58%, respectively) for trees associated with three phase lines.

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https://doi.org/10.48044/jauf.1995.032