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Broom Snakeweed (Gutierrezia sarothrae) Control with Picloram and Metsulfuron

Published online by Cambridge University Press:  12 June 2017

Kirk C. McDaniel  and
Keith W. Duncan
Kirk C. McDaniel
Affiliation:
Dep. Animal and Range Sci., New Mexico State Univ., Las Cruces, NM 88003
Keith W. Duncan
Affiliation:
Coop. Ext. Serv., New Mexico State Univ., Las Cruces, NM 88003
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Abstract

Picloram (4-amino-3,5,6-trichloro-2-pyridinecarboxylic acid) and metsulfuron {2-[[[[(4-methoxy-6-methyl-1,3,5-triazin-2-yl)amino] carbonyl] amino] sulfonyl] benzoic acid} were applied to broom snakeweed (Gutierrezia sarothrae [Pursh.] Britt. and Rusby # GUESA) on two spring dates and three fall dates from October 1983 to 1985. Applications of picloram and metsulfuron in the fall more effectively controlled broom snakeweed than applications in the spring. Lower herbicide rates were necessary for 90% or greater control on a sandy loam than on a silty clay loam. Grass yield increased significantly the first, second, and third growing seasons when a majority of the broom snakeweed were killed by either herbicide, but was not different from untreated rangeland when less than 50% of the plants were killed. Reduction in broom snakeweed densities of 90% or greater following applications of picloram or metsulfuron resulted in 3- to 5-fold increases in the estimated carrying capacity of rangeland in east-central New Mexico.

Keywords

Rangelandforage responseGUESA
Type
Weed Control and Herbicide Technolgy
Information
Weed Science , Volume 35 , Issue 6 , November 1987 , pp. 837 - 841
Copyright
Copyright © 1987 by the Weed Science Society of America 

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References

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