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Herbicide Concentrations in Live Oak Treated with Mixtures of Picloram and 2,4,5-T

Published online by Cambridge University Press:  12 June 2017

J. R. Baur ,
R. W. Bovey  and
J. D. Smith
J. R. Baur
Affiliation:
Crops Research Division, Agr. Res. Serv., U.S. Dep. of Agr., Dep. of Range Science, Texas A&M University, College Station, Texas
R. W. Bovey
Affiliation:
Crops Research Division, Agr. Res. Serv., U.S. Dep. of Agr., Dep. of Range Science, Texas A&M University, College Station, Texas
J. D. Smith
Affiliation:
Department of Plant Sciences, Texas A&M University, College Station, Texas
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Abstract

Recovery of (2,4,5-trichlorophenoxy)acetic acid (2,4,5-T), as the acid and ester, was significantly greater in live oak (Quercus virginiana Mill.) tissues treated with mixtures of the 2-ethylhexyl ester of 2,4,5-T (2 lb/A)-.potassium salt or isooctyl ester of 4-amino-3,5,6-trichloropicolinic acid (picloram) (1/2, 1 and 2 lb/A) than in tissues treated with 2 lb/A 2,4,5-T ester alone. Recovery of 2,4,5-T as the ester was noted in the middle and lower-stem tissues. Between 90 and 99% of the herbicide recovered 1 month after treatment was gone 6 months after treatment. Evaluation of brush reduction 2 years after treatment indicated that mixtures of picloram salt and 2,4,5-T resulted in greater reduction of brush than mixtures of picloram ester and 2,4,5-T or 2,4,5-T alone.

Type
Research Article
Information
Weed Science , Volume 17 , Issue 4 , October 1969 , pp. 567 - 570
Copyright
Copyright © 1969 Weed Science Society of America 

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References

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