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Response of Huisache (Acacia farnesiana) Seedlings to Herbicides Applied with a Model Carpeted Roller

Published online by Cambridge University Press:  12 June 2017

Herman S. Mayeux Jr.  and
Rodney W. Bovey
Herman S. Mayeux Jr.
Affiliation:
Agric. Res. Serv., U.S. Dep. Agric., Grassland, Soil and Water Res. Lab., Temple, TX 76502
Rodney W. Bovey
Affiliation:
Agric. Res. Serv., U.S. Dep. Agric., Grassland, Soil and Water Res. Lab., Temple, TX 76502
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Abstract

Mortality of potted huisache seedlings averaged 87 to 100% 18 weeks after picloram or clopyralid was applied with a model carpeted roller at concentrations as low as 7.5 g ae/L. A 1:1 mixture of picloram and clopyralid was equally effective. Triclopyr was effective only when applied to small seedlings in the spring, and an ester was more effective than an amine formulation. A 1:1 mixture of clopyralid and triclopyr ester was intermediate in effectiveness between the two herbicides applied alone. Adding surfactant increased canopy reduction and plant mortality (P = 0.1 to 0.01), especially at lower herbicide concentrations.

Keywords

Picloram, 4-amino-3,5,6-trichloro-2-pyridinecarboxylic acidclopyralid, 3,6-dichloro-2-pyridinecarboxylic acidtriclopyr, [(3,5,6-trichloro-2-pyridinyl)oxy] acetic aciddicamba, 3,6-dichloro-2-methoxybenzoic acidhuisache, Acacia farnesiana (L.)Willd. #3 ACAFAPicloramtriclopyrclopyraliddicambaACAFA
Type
Research
Information
Weed Technology , Volume 3 , Issue 2 , June 1989 , pp. 232 - 237
Copyright
Copyright © 1989 by the Weed Science Society of America 

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References

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