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Response of Certain Crops to Glyphosate in Irrigation Water

Published online by Cambridge University Press:  12 June 2017

R. D. Comes  and
A. D. Kelley
R. D. Comes
Affiliation:
Agric. Res., Sci. Ed. Admin., U.S. Dep. Agric., Irrigated Agric. Res. and Ext. Center, Prosser, WA 99350
A. D. Kelley
Affiliation:
Agric. Res., Sci. Ed. Admin., U.S. Dep. Agric., Irrigated Agric. Res. and Ext. Center, Prosser, WA 99350
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Abstract

Six crop species were irrigated with water that contained up to several times more glyphosate [N-(phosphonomethyl)glycine] than would be expected in irrigation water as a result of spraying ditchbank vegetation. In June or July 1976, sugarbeets (Beta vulgaris L.), alfalfa (Medicago sativa L., ‘Vernal’), grain sorghum [Sorghum bicolor (L.) Moench], field beans (Phaseolus vulgaris L., ‘Pinto’), tomatoes (Lycopersicon esculentum Mill., ‘Roza’), and squash [Cucurbita moschata (Duch.) Duch. ex Poir.] were sprinkler-irrigated with water that contained glyphosate at 0, 0.02, 0.22, or 2.2 ppmw. These concentrations were applied continuously for 8 h to make total applications of 0, 0.01, 0.1, and 1.1 kg/ha, respectively. No injury symptoms developed in any of the crop plants. Yields of treated crops were equal to those produced by untreated plants.

Keywords

Ditchbankscrop tolerance
Type
Research Article
Information
Weed Science , Volume 27 , Issue 6 , November 1979 , pp. 658 - 660
Copyright
Copyright © 1979 by the Weed Science Society of America 

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References

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