Hostname: page-component-cd9895bd7-dzt6s Total loading time: 0 Render date: 2024-12-24T17:45:35.029Z Has data issue: false hasContentIssue false
  • English
  • Français

Control of White Locoweed (Oxytropis sericea)

Published online by Cambridge University Press:  12 June 2017

Michael H. Ralphs ,
Larry V. Mickelsen ,
David L. Turner  and
Darwin B. Nielsen
Michael H. Ralphs
Affiliation:
Agric. Res. Serv., U.S. Dep. Agric., Poisonous Plant Res. Lab., 1150 E. 1400 N., Logan, UT 84321
Larry V. Mickelsen
Affiliation:
Agric. Res. Serv., U.S. Dep. Agric., Poisonous Plant Res. Lab., 1150 E. 1400 N., Logan, UT 84321
David L. Turner
Affiliation:
Utah State Univ., Logan, UT 84322
Darwin B. Nielsen
Affiliation:
Utah State Univ., Logan, UT 84322
Get access Rights & Permissions [Opens in a new window]

Abstract

Several herbicides were evaluated for control of white locoweed (Oxytropis sericea Nutt. T & G # OXRMA) and changes in botanical composition on two sites on high-elevation rangeland. White locoweed was more abundant and its population more stable on the rocky subalpine wind-swept ridge site than on the subalpine loam site. Picloram (4-amino-3,5,6-trichloro-2-pyridinecarboxylic acid) at 0.6 and 1.1 kg ae/ha, and 2,4-D [(2,4-dichlorophenoxy)acetic acid] at 2.2 and 4.5 kg ae/ha eliminated white locoweed on the subalpine loam site, although the population on this site declined naturally. Clopyralid (3,6-dichloro-2-pyridinecarboxylic acid) was the most effective herbicide on the subalpine wind-swept site. Clopyralid at 0.3 and 0.6 kg ae/ha, dicamba (3,6-dichloro-2-methoxybenzoic acid) at 2.2 kg ae/ha, and 2,4-D at 1.1 kg ae/ha plus clopyralid or picloram at 0.3 kg/ha killed all white locoweed plants. Lower rates of clopyralid (0.1 kg/ha), dicamba (0.6 and 1.1 kg/ha), 2,4-D (2.2 and 4.5 kg/ha), and triclopyr {[(3,5,6-trichloro-2~pyridinyl)oxy] acetic aicid)} (0.6, 1.1, and 2.2 kg ae/ha) killed 45 to 84% of white locoweed plants. Grass cover increased on most treated areas where white locoweed, forbs, and sagebrush declined. Cattle consumption of white locoweed declined following application of 2,4-D.

Keywords

Herbicidepoisonous plantcattle grazingsilky crazyweedOXRMA
Type
Weed Control and Herbicide Technology
Information
Weed Science , Volume 36 , Issue 3 , May 1988 , pp. 353 - 358
Copyright
Copyright © 1988 by the Weed Science Society of America 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Literature Cited

1. Cook, C. W. and Stubbendieck, J., eds. 1986. Range Research: Basic Problems and Techniques. Soc. for Range Manage., Denver, CO. Pages 57–58.Google Scholar
2. James, L. F., Hartley, W. J., and Van Kampen, K. R. 1981. Syndromes of Astragalus poisoning in livestock. J. Am. Vet. Med. Assoc. 178:146–150.Google Scholar
3. Ralphs, M. H. 1987. Cattle grazing white locoweed: influence of grazing pressure and palatability associated with phenological growth stage. J. Range Manage. 40:330–332.CrossRefGoogle Scholar
4. Ralphs, M. H., and Cronin, E. H. 1987. Locoweed seed in soil: density, longevity, germination, and viability. Weed Sci. 35:792–795.Google Scholar