Hostname: page-component-76fb5796d-22dnz Total loading time: 0 Render date: 2024-04-28T19:23:02.611Z Has data issue: false hasContentIssue false
  • English
  • Français

Spray Droplet Residual of Glyphosate in Various Carriers

Published online by Cambridge University Press:  12 June 2017

John D. Nalewaja ,
Robert Matysiak  and
Thomas P. Freeman
John D. Nalewaja
Affiliation:
ND State Univ., Fargo, ND 58105
Robert Matysiak
Affiliation:
ND State Univ., Fargo, ND 58105
Thomas P. Freeman
Affiliation:
ND State Univ., Fargo, ND 58105
Get access Rights & Permissions [Opens in a new window]

Abstract

Scanning electron micrographs of spray droplet residual on wheat, sunflower, and kochia indicated that salts and various adjuvants applied with glyphosate affected deposit crystal content, thickness, and contact with the leaf surface. Spray deposits of glyphosate applied with diammonium sulfate contained distinct crystals, which related to enhanced toxicity of glyphosate applied alone, or to overcoming antagonism of glyphosate toxicity by calcium chloride, when applied to wheat. In general, glyphosate applied with antagonistic calcium chloride salt formed spray deposits that were amorphous, thick, and without crystals. Glyphosate sprayed with nonantagonistic diammonium sulfate and ammonium chloride salts had deposits with crystals and an evenly spread residue beneath the crystals. The various micrographs indicate that the antagonism of glyphosate phytotoxicity by salts may be in part from physical entrapment of glyphosate in the spray deposit. Glyphosate spray droplet residue contact with wheat, sunflower, and kochia surfaces related to observed differences in glyphosate toxicity to these species.

Keywords

Glyphosate, N-(phosphonomethyl)glycinekochia, Kochia scoparia (L.) Schrad. #3 KCHSCsunflower, Helianthus annuus L. # HELANwheat, Triticum aestivum L. ‘Marshall’Antagonismadjuvantsscanning electron micrographswater qualityHelianthus annuusKochia scopariaTriticum aestivumHELANKCHSC
Type
Weed Control and Herbicide Technology
Information
Weed Science , Volume 40 , Issue 4 , December 1992 , pp. 576 - 589
Copyright
Copyright © 1992 by the Weed Science Society of America 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Literature Cited

1. Adams, C. M., Caporn, S.J.M., and Hutchinson, T. C. 1990. Crystal occurrence and wax disruption on leaf surfaces of cabbage treated with simulated acid rain. New Phytol. 114:147–158.Google Scholar
2. Buhler, D. D. and Burnside, O. C. 1983. Effect of water quality, carrier volume, and acid on glyphosate phytotoxicity. Weed Sci. 31:163–169.Google Scholar
3. Cramner, J. R. and Linscott, D. L. 1990. Droplet makeup and the effect on phytotoxicity of glyphosate in velvetleaf. Weed Sci. 38:406–410.Google Scholar
4. DeRutter, H., Uffing, A.J.M., Meinen, E., and Ruins, A. 1990. Influence of surfactants and plant species on leaf retention of spray solutions. Weed Sci. 38:567–572.CrossRefGoogle Scholar
5. Hess, D. F. and Folk, R. H. 1990. Herbicide deposition on leaf surfaces. Weed Sci. 38:280–288.Google Scholar
6. Mac Isaac, S. A., Paul, R. N., and Devine, M. D. 1991. A scanning electron microscope study of glyphosate deposits in relation to foliar uptake. Pestic. Sci. 31:53–64.Google Scholar
7. Nalewaja, J. D. and Matysiak, R. 1991. Salt antagonism of glyphosate. Weed Sci. 39:622–628.Google Scholar
8. Nalewaja, J. D., and Matysiak, R. 1992. Species differ in response to adjuvants with glyphosate. Weed Technol. 6:561–566.Google Scholar
9. O'Donovan, J. T. and O'Sullivan, P. A. 1982. The antagonistic action of 2,4-D and bromoxynil on glyphosate phytotoxicity to barley. Weed Sci. 30:30–34.Google Scholar
10. Sandberg, C. L., Meggitt, W. F., and Penner, D. 1978. Effect of volume and calcium on glyphosate phytotoxicity. Weed Sci. 26:476–479.CrossRefGoogle Scholar
11. Shea, P. J. and Tripy, D. R. 1984. Renewal of cation-induced reduction in glyphosate activity with EDTA. Weed Sci. 32:802–806.Google Scholar
12. Stahlman, P. W. and Phillips, W. M. 1979. Effect of water quality and spray volume on glyphosate phytotoxicity. Weed Sci. 27:38–41.Google Scholar
13. Turner, K. J. and Loader, M.P.C. 1978. Complexing agents as herbicide additives. Weed Res. 18:199–207.Google Scholar
14. Wills, F. D. and McWhorter, C. G. 1985. Effect of inorganic salts on toxicity and translocation of glyphosate and MSMA in purple nutsedge. Weed Sci. 33:755–761.Google Scholar