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Effect of Simulated Rainfall on Herbicide Performance in Huisache (Acacia farnesiana) and Honey Mesquite (Prosopis glandulosa)

Published online by Cambridge University Press:  12 June 2017

Rodney W. Bovey ,
Robert E. Meyer  and
Steven G. Whisenant
Rodney W. Bovey
Affiliation:
Agric. Res. Serv. U.S. Dep. Agric
Robert E. Meyer
Affiliation:
Agric. Res. Serv. U.S. Dep. Agric
Steven G. Whisenant
Affiliation:
Dep. Range Sci., Tex. A&M Univ., College Station, TX 77843
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Abstract

Greenhouse and field experiments were conducted in east-central Texas to evaluate the influence of simulated rainfall on the availability of foliar-applied herbicides for huisache and honey mesquite control. The foliar activity of the amine salts of glyphosate, dicamba, picloram, clopyralid, and triclopyr was decreased on greenhouse-grown huisache when simulated rainfall was applied up to 240 min after herbicide treatment. The effectiveness of the butoxyethyl ester of triclopyr or 2,4,5-T was not reduced by rainfall washoff within 15 min after application. In natural huisache stands, injury from the ester of triclopyr or amine salts of picloram or clopyralid was not reduced by simulated rainfall at 60 min after herbicide treatment. In the greenhouse and field, honey mesquite leaves rapidly absorbed most herbicides, and triclopyr, 2,4,5-T, picloram, and clopyralid were highly phytotoxic even when simulated rainfall was applied within 15 min after herbicide treatment.

Keywords

Clopyralid, 3,6-dichloro-2-pyridinecarboxylic acid, dicamba, 3,6-dichloro-2-methoxybenzoic acidglyphosate, N-(phosphonomethyl)glycinepicloram, 4-amino-3,5,6-trichloro-2-pyridinecarboxylic acid2,4,5-T, (2,4,5-trichlorophenoxy)acetic acidtriclopyr, [(3,5,6-trichloro-2-pyridinyl)oxy]acetic acidhoney mesquite, Prosopis glandulosa Torr. ♯3 PRCJGhuisache, Acacia farnesiana (L.)Willd. ♯ ACAFAClopyraliddicambaglyphosatepicloram2,4,5-TtriclopyrPRCJGACAFA
Type
Research
Information
Weed Technology , Volume 4 , Issue 1 , March 1990 , pp. 26 - 30
Copyright
Copyright © 1990 Weed Science Society of America 

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References

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