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Herbicide Control of Locoweeds: A Review

Published online by Cambridge University Press:  12 June 2017

Michael H. Ralphs  and
Darrell N. Ueckert
Michael H. Ralphs
Affiliation:
Agric. Res. Serv., U.S. Dep. Agric., Poisonous Plant Res. Lab., 1150 E. 1400 N., Logan, UT 84321
Darrell N. Ueckert
Affiliation:
Range Res., Tex. Agric. Exp. Stn., San Angelo, TX 76901
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Abstract

Locoweed poisoning of livestock is the most widespread poisonous plant problem in the western United States. This paper presents a historical review of control methods to reduce locoweed plant density. Hand grubbing, the most common method of control before phenoxy herbicides, was practical in small pastures considering the number of livestock saved. Trials in the 1950s indicated that 2,4-D and 2,4,5-T generally controlled locoweeds effectively if applied when plants were actively growing and soil moisture was not limiting plant growth. Picloram, dicamba, clopyralid, and triclopyr provide more consistent control than 2,4-D and 2,4,5-T when applied at less than optimum environmental conditions.

Keywords

Clopyralid, 3,6-dichloro-2-pyridinecarboxylic aciddicamba, 3,6-dichloro-2-methoxybenzoic acidpicloram, 4-amino-3,5,6-trichloro-2-pyridinecarboxylic acidtriclopyr, [(3,5,6-trichloro-2-pyridinyl)oxy]acetic acid2,4-D, (2,4-dichlorophenoxy)acetic acid2,4,5-T, (2,4,5-trichlorophenoxy)acetic acidlocoweed, Astragalus and Oxytropis spp.Poisonous plantslivestock poisoningAstragalus spp.Oxytropis spp.
Type
Research
Information
Weed Technology , Volume 2 , Issue 4 , October 1988 , pp. 460 - 465
Copyright
Copyright © 1988 by the Weed Science Society of America 

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References

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