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Response of Certain Crops to Glyphosate in Irrigation Water

  • R. D. Comes (a1) and A. D. Kelley (a1)

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.

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Copyright

References

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1. Bruns, V. F. 1954. The response of certain crops to 2,4-dichlorophenoxyacetic acid in irrigation water. Part 1. Red Mexican beans. Weeds 3:359376.
2. Bruns, V. F. and Dawson, J. H. 1959. Effect of DCB, DCB-xylene mixtures, amitrole, and sodium salt of dalapon in irrigation water on corn and rutabagas. Weeds 7:333340.
3. Bruns, V. F., Hodgson, J. M., and Arle, H.F. 1972. Response of several crops to six herbicides in irrigation water. U.S.D.A. Tech. Bull. No. 1461,29 pp.
4. Bruns, V. F. and Kelley, A. D. 1975. Responses and residues in certain crops irrigated with water containing glyphosate. Washington Coll. Agric. Res. Bull. No. 812. 6 pp.
5. Comes, R. D. 1974. Control of reed canarygrass on ditchbanks with glyphosate. Abstr. Weed Sci. Soc. Am., 270, p. 116.
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9. Weed Science Society of America. 1974. Herbicide Handbook. 3rd ed. Weed Sci. Soc. Am., Champaign, Illinois 430 pp.
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Keywords

Response of Certain Crops to Glyphosate in Irrigation Water

  • R. D. Comes (a1) and A. D. Kelley (a1)

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