Trunk Injection of Plant Growth Regulators to Control Tree Regrowth    (View PDF)

Subhash C. Domir and Bruce R. Roberts

Abstract: In a continuing study of the chemical control of trees under utility rights-of-way, the sprout regrowth of the American sycamore (Platanus occidentalis), silver maple (Acer saccharinum), red oak (Quercus rubra), and shamel ash {Fraxinus uhdei) injected with water solutions of 1,2-dihydro-3,6-pyridazinedione (maleic hydrazide, MH) and the sodium salt of 2,3:4, 6-bis-0-(1 -methylethylidene)-tf-L-xylo-2-hexulofuranosonic acid (dikegulac) in the spring of 1977 was recorded again in the fall of 1979 after 3 growing seasons. High concentrations of dikegulac were effective in reducing regrowih on silver maple and red oak after 3 years when compared to untreated controls. Although treatmens made on sycamore and shamel ash showed no significant effect in 1979, visual observations by utility line clearance personnel suggest that chemically treated trees will need no trimming for an additional year or two.

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https://doi.org/10.48044/jauf.1981.034