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Effects of Frost and Maturity on Glyphosate Phytotoxicity, Uptake, and Translocation

Published online by Cambridge University Press:  12 June 2017

H. E. Davis ,
R. S. Fawcett  and
R. G. Harvey
H. E. Davis
Affiliation:
Dep. Agron., Univ. of Wisconsin, Madison, WI 53706
R. S. Fawcett
Affiliation:
Dep. Agron., Univ. of Wisconsin, Madison, WI 53706
R. G. Harvey
Affiliation:
Dep. Agron., Univ. of Wisconsin, Madison, WI 53706
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Abstract

The effect of temperatures below 0 C and plant maturity on the phytotoxicity of glyphosate [N-(phosphonomethyl)glycine] on rapidly growing alfalfa (Medicago sativa L. ‘Vernal’) and quackgrass [Agropyron repens (L.) Beauv.] plants was studied in a controlled environment. Pretreatment at −4 C partially protected alfalfa from injury by 0.8 kg/ha of glyphosate at six alfalfa maturities. This same treatment had no significant effect on glyphosate phytotoxicity to quackgrass. Pretreatment at −4 C increased translocation of glyphosate in quackgrass but reduced its translocation in alfalfa. A greater reduction in translocation occurred in the smaller alfalfa plants.

Keywords

Agropyron repensMedicago sativaplant growth
Type
Research Article
Information
Weed Science , Volume 27 , Issue 1 , January 1979 , pp. 110 - 114
Copyright
Copyright © 1979 by the Weed Science Society of America 

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References

Literature Cited

1. Davis, H. E. and Fawcett, R. S. 1976. The effect of frost on glyphosate phytotoxicity to alfalfa and quackgrass. Abstr. 187, Weed Sci, Soc. Am., p. 77.Google Scholar
2. Davis, H. E., Fawcett, R. S., and Harvey, R. G. 1978. Effect of fall frost on the activity of glyphosate on alfalfa (Medicago sativa) and quackgrass (Agropyron repens). Weed Sci. 26:41–45.CrossRefGoogle Scholar
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