PT  - JOURNAL ARTICLE
AU  - Gallagher, Peter W.
AU  - Sydnor, T. Davis
TI  - Promotion of Wound Closure in Shade Trees with Exogenously-Applied Growth Regulators
AID  - 10.48044/jauf.1983.056
DP  - 1983 Sep 01
TA  - Arboriculture & Urban Forestry (AUF)
PG  - 229--232
VI  - 9
IP  - 9
4099  - http://auf.isa-arbor.com/content/9/9/229.short
4100  - http://auf.isa-arbor.com/content/9/9/229.full
AB  - 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 × 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.