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A Carrier for Some Water-Soluble Herbicides

Published online by Cambridge University Press:  12 June 2017

Samuel J. Shellhorn  and
Herbert M. Hull
Samuel J. Shellhorn
Affiliation:
Crops Res. Div., Agr. Res. Ser., U.S. Dep. of Agr., Tucson, Arizona
Herbert M. Hull
Affiliation:
Crops Res. Div., Agr. Res. Ser., U.S. Dep. of Agr., Tucson, Arizona
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Abstract

A mixture of dimethyl sulfoxide (DMSO), glycerol, phytobland oil, and water (50:25:15:10, v/v) proved to be outstandingly effective as a carrier for water-soluble formulations of 4-amino-3,5,6-trichloropicolinic acid (picloram), (2,4,5-trichlorophenoxy)acetic acid (2,4,5-T), and mixtures thereof. The carrier was selected after numerous experiments in which these and other adjuvants, used individually, gave at least some degree of herbicidal enhancement on velvet mesquite seedlings [Prosopis juliflora var. velutina (Woot.) Sarg.]. Maximum synergism between the carrier complex and herbicide occurred with the triethylamine salt of 2,4,5-T; relatively little influence on the butoxyethanol ester was observed. Picloram and 3,6-dichloro-o-anisic acid (dicamba) were intermediate in activity between the two phenoxy formulations.

Type
Research Article
Information
Weed Science , Volume 19 , Issue 1 , January 1971 , pp. 102 - 106
Copyright
Copyright © Weed Science Society of America 

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References

Literature Cited

1. Hull, H. M. 1965. Dimethyl sulfoxide as a herbicide carrier under different conditions of light intensity. Proc. West. Weed Contr. Conf. 20:12.Google Scholar
2. Hull, H. M. and Shellhorn, S. J. 1967. Foliar absorption of 2,4,5-T from emulsions and straight oil carriers in combination with oil-soluble surfactants. West. Weed Contr. Conf. Res. Progr. Rep., p. 123–124.Google Scholar
3. Hull, H. M. and Shellhorn, S. J. 1968. Some herbicide-carrier interrelationships in the control of velvet mesquite. Proc. West. Soc. Weed Sci. 22:19–20.Google Scholar
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5. Shellhorn, S. J. and Hull, H. M. 1969. Enhanced herbicidal absorption in mesquite with a DMSO carrier complex. Weed Sci. Soc. Amer. Abst. No. 163.Google Scholar
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