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Mode of Clopyralid Uptake by Honey Mesquite (Prosopis glandulosa)

Published online by Cambridge University Press:  12 June 2017

Rodney W. Bovey ,
Hugo Hein Jr.  and
Robert E. Meyer
Rodney W. Bovey
Affiliation:
Agric. Res. Serv., U.S. Dep. Agric., Range Sci. Dep., Texas A&M Univ., College Station, TX 77843
Hugo Hein Jr.
Affiliation:
Agric. Res. Serv., U.S. Dep. Agric., Range Sci. Dep., Texas A&M Univ., College Station, TX 77843
Robert E. Meyer
Affiliation:
Agric. Res. Serv., U.S. Dep. Agric., Range Sci. Dep., Texas A&M Univ., College Station, TX 77843
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Abstract

Leaves absorbed high amounts of clopyralid (3,6-dichloro-2-pyridinecarboxylic acid) as foliar sprays on honey mesquite (Prosopis glandulosa Torr. # PRCJG) as indicated by concentrations of 10 μg/g fresh wt or more in basal stem phloem by 4 days after treatment. Small quantities of clopyralid (< 1 μg/g) were detected in basal stem phloem after spray applications of clopyralid to defoliated plants or roots treated by soil application. When applied to foliated plants, the 0.56 kg/ha of clopyralid killed 60% or more plants, but none were killed when clopyralid sprays were applied to defoliated plants or when 2.2 kg/ha of clopyralid was applied to the soil. Water, diesel oil plus water, or water plus surfactant were equally effective as clopyralid carriers as foliar sprays.

Keywords

Herbicidessurfactantphloemgas chromatographyPRCJG
Type
Physiology, Chemistry, and Biochemistry
Information
Weed Science , Volume 36 , Issue 3 , May 1988 , pp. 269 - 272
Copyright
Copyright © 1988 by the Weed Science Society of America 

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References

Literature Cited

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