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Chemical Mixtures for Control of Winged Elm

Published online by Cambridge University Press:  12 June 2017

J. F. Stritzke
J. F. Stritzke*
Affiliation:
Agron. Dep., Oklahoma State Univ., Stillwater, OK 74074
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Abstract

Various growth regulators, carrier systems, and ammonium thiocyanate (NH4SCN) additions in combination with herbicide mixtures were evaluated for their foliar phytotoxicity to winged elm (Ulmus alata Michx.). Silvex [2-(2,4,5-trichlorophenoxy)propionic acid] and 2,4,5-T [(2,4,5-trichlorophenoxy)acetic acid] were more effective than the dichlorophenoxy herbicides. Additions of NH4SCN to the ester of 2,4,5-T consistently increased control. Picloram (4-amino-3,5,6-trichloropicolinic acid) was the most effective herbicide for killing the trees, and in mixtures with the phenoxy herbicides consistently produced good tree kill. No increase in 2,4,5-T activity could be attributed to additions of growth regulators, concentrated nutrient solutions, or to type of carrier system used.

Type
Research Article
Information
Weed Science , Volume 23 , Issue 2 , March 1975 , pp. 131 - 136
Copyright
Copyright © 1975 by the Weed Science Society of America 

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References

Literature Cited

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