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Effect of Herbicides on Miserotoxin Concentration in Wasatch Milkvetch (Astragalus miser var. oblongifolius)

Published online by Cambridge University Press:  12 June 2017

M. Coburn Williams  and
Michael H. Ralphs
M. Coburn Williams
Affiliation:
Agric. Res. Serv., U.S. Dep. Agric., Poisonous Plant Res. Lab., 1150 E. 1400 N., Logan, UT 84321
Michael H. Ralphs
Affiliation:
Agric. Res. Serv., U.S. Dep. Agric., Poisonous Plant Res. Lab., 1150 E. 1400 N., Logan, UT 84321
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Abstract

The effect of herbicides on the concentration of miserotoxin, the toxic compound in Wasatch milkvetch [Astragalus miser var. oblongifolius (Rydb.) Cronq. # ASAMO], was investigated. Eight herbicides or herbicide combinations were applied to Wasatch milkvetch in June 1985 and 1986. The concentration of miserotoxin was determined weekly for 4 weeks after treatments. All treatments in both years significantly reduced the miserotoxin concentration when compared to the controls, except for the 0.6 kg ae/ha rate of clopyralid (3,6-dichloro-2-pyridinecarboxylic acid) in 1986. Wasatch milkvetch treated with triclopyr {[(3,5,6-trichloro-2-pyridinyl)oxy] acetic acid} at 1.7 and 2.2 kg ae/ha desiccated rapidly and had consistently low concentrations of miserotoxin 4 weeks after treatment.

Keywords

Fabaceaepoisonous plant3-nitro-1-propanolASAMO
Type
Physiology, Chemistry, and Biochemistry
Information
Weed Science , Volume 35 , Issue 6 , November 1987 , pp. 746 - 748
Copyright
Copyright © 1987 by the Weed Science Society of America 

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References

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