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Herbicide Control of Locoweeds: A Review

Published online by Cambridge University Press:  12 June 2017

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

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.

Type
Research
Copyright
Copyright © 1988 by the Weed Science Society of America 

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