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Control of Yaupon and Associated Species

Published online by Cambridge University Press:  12 June 2017

R. W. Bovey ,
H. L. Morton ,
R. E. Meyer ,
T. O. Flynt  and
T. E. Riley
R. W. Bovey
Affiliation:
Plant Sci. Res. Div., Agr. Res. Serv., U.S. Dep. of Agr., Dep. Range Sci., Texas A&M Univ., College Station, Tex. 77843
H. L. Morton
Affiliation:
Plant Sci. Res. Div., Agr. Res. Serv., U.S. Dep. of Agr., Dep. Range Sci., Texas A&M Univ., College Station, Tex. 77843
R. E. Meyer
Affiliation:
Plant Sci. Res. Div., Agr. Res. Serv., U.S. Dep. of Agr., Dep. Range Sci., Texas A&M Univ., College Station, Tex. 77843
T. O. Flynt
Affiliation:
Plant Sci. Res. Div., Agr. Res. Serv., U.S. Dep. of Agr., Dep. Range Sci., Texas A&M Univ., College Station, Tex. 77843
T. E. Riley
Affiliation:
Plant Sci. Res. Div., Agr. Res. Serv., U.S. Dep. of Agr., Dep. Range Sci., Texas A&M Univ., College Station, Tex. 77843
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Abstract

Early spring spray applications of the potassium salt of 4-amino-3,5,6-trichloropicolinic acid (picloram) and certain formulations of 1:1 mixtures of picloram plus (2,4,5-trichlorophenoxy)acetic acid (2,4,5-T) controlled yaupon (Ilex vomitoria Ait.). Ester formulations of picloram or picloram plus 2,4,5-T were ineffective. Combinations of surfactant and oil: water carriers usually did not improve herbicide performance over water carriers. Granular picloram was superior to sprays when applied as soil treatments at equal rates and controlled yaupon at most dates of application. Post oak (Quercus stellata Wangenh.) and blackjack oak (Quercus marilandica Muenchh.) were controlled more effectively by picloram or picloram plus 2,4,5-T sprays on the foliage than by granular picloram as a soil treatment. Picloram granules usually killed winged elm (Ulmus alata Michx.) regardless of date of application.

Type
Research Article
Information
Weed Science , Volume 20 , Issue 3 , May 1972 , pp. 246 - 249
Copyright
Copyright © Weed Science Society of America 

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References

Literature Cited

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