Current Articles
Browse Archives
Search
Contact Us
AUF Home
ISA Seal
Get Acrobat Reader

Arboriculture & Urban Forestry Online
Volume 9, Issue 9 — September 1983
https://www.isa-arbor.com/Publications/Arboriculture-Urban-Forestry

Promotion of Wound Closure in Shade Trees with Exogenously-Applied Growth Regulators    (View PDF)

Peter W. Gallagher and T. Davis Sydnor

Abstract: In a trial of three growth regulators in aqueous solutions at four concentrations on wounds of Acer rubrum 'Bowhall', 2,4-dichlorophenoxyacetic acid, (2,4-D) at 1,000 mg/l initially increased the closure rate. However, this effect was no longer significant by the end of the season. Ethephon and benzyl adenine (BA) were ineffective at lower concentrations and inhibitory to closure at 1,000 mg/l. In a follow-up study with 2,4-D, both the carrier solvent (47% ethanol) and 2,4-D at 10,000 mg/l were phytotoxic. Five auxins were applied to aqueous solutions, each at four concentrations, to wounds of Populus X androscoggin in a greenhouse. Dicamba, 2,4-D, IAA and IBA initially stimulated closure rate at 1,000 mg/l. Picloram showed a similar stimulus at 10 mg/l, but was phytotoxic at higher concentrations.

Keywords: Acer rubrum; Auxin; Ethephon; Growth Regulators; Poplar; Populus sp.; Red Maple; Wound Closure; 2,4-dichlorophenoxyacetic acid

https://doi.org/10.48044/jauf.1983.056


Current Articles | Browse Archives | Search | AUF Home | ISA Home | Get Acrobat