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Absorption, Action, and Translocation of Glyphosate

Published online by Cambridge University Press:  12 June 2017

Paul Sprankle ,
William F. Meggitt  and
Donald Penner
Paul Sprankle
Affiliation:
Dep. of Crop and Soil Sci., Michigan State Univ., E. Lansing, MI 48824
William F. Meggitt
Affiliation:
Dep. of Crop and Soil Sci., Michigan State Univ., E. Lansing, MI 48824
Donald Penner
Affiliation:
Dep. of Crop and Soil Sci., Michigan State Univ., E. Lansing, MI 48824
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Abstract

Radioactive glyphosate [N-(phosphonomethyl)glycine] is rapidly absorbed with a large portion of the 14C translocated to the rhizomes and untreated shoots of quackgrass [Agropyron repens (L.) Beauv.]. The adjuvant used with glyphosate was important in determining its phytotoxicity to quackgrass. In other perennial weeds and annual species, glyphosate also moved to the areas of highest metabolic activity. In Canada thistle [Cirsium arvense (L.) Scop.], bentazon (3-isopropyl-1H-2,1,3-benzothiadiazin-(4) 3H-one 2,2-dioxide) at 2.24 kg/ha applied prior to treatment with 14C-glyphosate reduced 14C translocation. Iron or nitrilotriacetic acid (NTA) did not appear to effect glyphosate activity on wheat (Triticium aestivum L. ‘Avon’). The respiration of quackgrass treated with glyphosate was significantly reduced 9 days after treatment. Glyphosate reduced total photosynthesis more in quackgrass than in wheat.

Type
Research Article
Information
Weed Science , Volume 23 , Issue 3 , May 1975 , pp. 235 - 240
Copyright
Copyright © 1975 by the Weed Science Society of America 

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References

Literature Cited

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