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Selective Control of Mountain Big Sagebrush (Artemisia tridentata ssp. vaseyana) with Clopyralid

Published online by Cambridge University Press:  12 June 2017

Steven G. Whisenant*
Affiliation:
Dep. Bot. and Range Sci., Brigham Young Univ., Provo, UT 84602

Abstract

Sprays of 2.2 kg ae/ha of 2,4-D [(2,4-dichlorophenoxy)acetic acid] and 0.5, 1.1, or 2.2 kg ae/ha of clopyralid (3,6-dichloro-2-pyridinecarboxylic acid) were applied at three Utah sites. The 2,4-D and 1.1 or 2.2 kg/ha of clopyralid effectively controlled mountain big sagebrush (Artemisia tridentata Nutt. # ARTTR ssp. vaseyana). Applications of 2.2 kg/ha of 2,4-D resulted in 84% mortality of antelope bitterbrush [Purshia tridentata (Pursh.) DC] and killed 96% of the Saskatoon serviceberry (Amelanchier alnifolia Nutt.). Clopyralid applications of 2.2 kg/ha killed only 5% of the antelope bitterbrush and 6% of the Saskatoon serviceberry. Thus, clopyralid is an effective alternative to 2,4-D for control of mountain big sagebrush when the desirable shrubs antelope bitterbrush and/or Saskatoon serviceberry are present.

Type
Weed Control and Herbicide Technology
Copyright
Copyright © 1987 by the Weed Science Society of America 

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References

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