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Concentration of 2,4,5-T, Triclopyr, Picloram, and Clopyralid in Honey Mesquite (Prosopis glandulosa) Stems

  • Rodney W. Bovey (a1), Hugo Hein (a1) and Robert E. Meyer (a1)

Abstract

Triclopyr {[(3,5,6-trichloro-2-pyridinyl)oxy] acetic acid}, 2,4,5-T [(2,4,5-trichlorophenoxy)acetic acid], picloram (4-amino-3,5,6-trichloro-2-pyridinecarboxylic acid), and clopyralid (3,6-dichloro-2-pyridinecarboxylic acid) were applied to honey mesquite (Prosopis glandulosa Torr. # PRCJG) on seven different dates about every 3 weeks from May to September in 1980 and 1981. Concentrations of 2,4,5-T or triclopyr in stem tissue were usually less than 2 μg/g fresh weight regardless of date of application. Concentrations of picloram and clopyralid were as high as 11 and 22 μg/g fresh weight, respectively, in upper stem phloem at some dates of application. Higher concentrations of all herbicides were detected in upper stem phloem than in the upper stem xylem or basal stem phloem or xylem. More herbicide tended to be detected in stems when herbicides were applied early (May and June) than late (August and September) in the season. Concentrations of triclopyr and picloram recovered from honey mesquite stems were about 25% greater at 3 than at 30 days after treatment, whereas concentrations of 2,4,5-T and clopyralid were about 50% greater at 3 than at 30 days after application.

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References

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1. Bovey, R. W. and Mayeux, H. S. Jr. 1980. Effectiveness and distribution of 2,4,5-T, triclopyr, picloram, and 3,6-dichloropicolinic acid in honey mesquite (Prosopis juliflora var. glandulosa). Weed Sci. 34:666670.
2. Bovey, R. W., Meyer, R. E., and Baur, J. R. 1981. Potential herbicides for brush control. J. Range Manage. 34:144148.
3. Bovey, R. W., Hein, Hugo Jr., and Meyer, R. E. 1983. Absorption and translocation of triclopyr in honey mesquite (Prosopis juliflora var. glandulosa). Weed Sci. 31:807812.
4. Bovey, R. W. and Meyer, R. E. 1985. Herbicide mixtures for control of honey mesquite (Prosopis glandulosa). Weed Sci. 33:349352.
5. Cotterill, E. G. 1978. Determination of 3,6-dichloropicolinic acid residues in soil by gas chromatography of the 1-butyl ester. Bull. Environ. Contamin. Toxicol. 15:471474.
6. Davis, F. S., Meyer, R. E., Baur, J. R., and Bovey, R. W. 1972. Herbicide concentrations in honey mesquite phloem. Weed Sci. 20:264267.
7. Jacoby, P. W., Meadors, C. H., and Foster, M. A. 1981. Control of honey mesquite (Prosopis juliflora var. glandulosa) with 3,6-dichloropicolinic acid. Weed Sci. 29:376378.
8. Jacoby, P. W. and Meadors, C. H. 1983. Triclopyr for control of honey mesquite (Prosopis juliflora var. glandulosa). Weed Sci. 31:681685.
9. Meyer, R. E. and Bovey, R. W. 1986. Influence of environment and stage of growth on honey mesquite (Prosopis glandulosa) response to herbicides. Weed Sci. 34:287299.
10. Steel, R.G.D. and Torrie, J. H. 1980. Principles and Procedures of Statistics. A Biometrical Approach. McGraw-Hill Book Co., NY. 633 pp.

Keywords

Concentration of 2,4,5-T, Triclopyr, Picloram, and Clopyralid in Honey Mesquite (Prosopis glandulosa) Stems

  • Rodney W. Bovey (a1), Hugo Hein (a1) and Robert E. Meyer (a1)

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