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Influence of Adjuvants on the Deposition, Absorption, and Translocation of Clopyralid in Honey Mesquite (Prosopis glandulosa)

Published online by Cambridge University Press:  12 June 2017

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

Abstract

The addition of surfactant (trimethylnonylpolyethoxyethanol) at 0.5% (v/v) of the spray solution caused a twofold increase in the deposit of clopyralid (3,6-dichloro-2-pyridinecarboxylic acid) applied at 0.14 or 0.28 kg ae/ha on greenhouse-grown honey mesquite (Prosopis glandulosa Torr. # PRCJG) and increased transport into the plants compared to clopyralid applied alone. Application of equal rates of benazolin [4-chloro-2-oxo-3(2H)-benzothiazoleacetic acid] with clopyralid at 0.28 + 0.28 kg/ha enhanced transport of clopyralid into honey mesquite. Spray deposit, absorption, and translocation of clopyralid was unaffected by addition of 0.5% (v/v) of d'limonene (4-isopropenyl-1-methyl-cyclohexane). Greater spray deposit of clopyralid on plant surfaces after addition of surfactant was associated with reduced liquid surface tension and greater percentage of spray volume in small droplets (<204-μm diam).

Type
Weed Control and Herbicide Technolgy
Copyright
Copyright © 1987 by the Weed Science Society of America 

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References

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