Control of Yaupon and Associated Species

Author:

Bovey R. W.,Morton H. L.,Meyer R. E.,Flynt T. O.,Riley T. E.

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 vomitoriaAit.). 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 stellataWangenh.) and blackjack oak(Quercus marilandicaMuenchh.) 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 alataMichx.) regardless of date of application.

Publisher

Cambridge University Press (CUP)

Subject

Plant Science,Agronomy and Crop Science

Reference13 articles.

1. Smith H. N. and Rechenthin E. A. 1964. Grassland restoration—the Texas brush problem. U.S. Dep. Agr., Soil Conserv. Serv. Unnumbered Bull. 33 p.

2. Lehman S. K. and Davis F. S. 1967. Control of winged elm (Ulmus alata Michx.). Abstr., Weed Sci. Soc. Amer. p. 23.

3. Comparison of salt and ester formulations of picloram;Bovey;Weed Sci.,1970

4. Winged elm control with picloram and 2,4,5-T with and without additives;Elwell;Weed Sci.,1967

5. Herbicide combinations for woody plant control;Bovey;Weed Sci.,1968

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