Abstract
Greenhouse grown 1- to 2-year-old seedlings of silver maple (Acer saccharinum L.), American sycamore (Platanus occidentalis L.), black locust (Robinia pseudoacacia L.), and white ash (Fraxinus americana L.) were injected with one of three plant growth regulating chemicals. 1-napthylacetic acid (NAA) and N,N,N-tributyl-N-(trifluormethylbenzyl) ammonium chloride (an analogue of Phosfon S, coded DOWCO 391) retarded shoot regrowth at appropriate concentrations without causing an unacceptable degree of foliar damage to seedlings. Fosamine-ammonium (ammonium ethyl carbanoyl phosphonate, trade name Krenite) even at low concentrations, produced severe phytotoxicity indicating that it acts more as a herbicide than as a growth retardant.
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This paper reports the results of research only. Mention of a growth in this paper does not constitute a recommendation for use by the U.S. Department of Agriculture nor does it imply registration under FIFRA as amended. Mention of a trademark or proprietory product does not constitute a guarantee or warranty of the product by the U.S. Department of Agriculture and does not imply its approval to the exclusion of other products that may also be suitable.
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Domir, S.C., Wuertz, D.E. Growth retardation of woody species by three growth regulators. Plant Growth Regul 1, 93–105 (1982). https://doi.org/10.1007/BF00024503
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DOI: https://doi.org/10.1007/BF00024503