Hostname: page-component-586b7cd67f-vdxz6 Total loading time: 0 Render date: 2024-11-23T18:43:52.606Z Has data issue: false hasContentIssue false
  • English
  • Français

Optimal Glyphosate Application Time for Control of Foxtail Barley (Hordeum jubatum)

Published online by Cambridge University Press:  12 June 2017

Jeffery S. Conn  and
Richard E. Deck
Jeffery S. Conn
Affiliation:
USDA-ARS, 309 O'Neill Bldg., P.O. Box 757200, University of Alaska, Fairbanks, AK 99775-7200
Richard E. Deck
Affiliation:
USDA-ARS, 309 O'Neill Bldg., P.O. Box 757200, University of Alaska, Fairbanks, AK 99775-7200
Get access Rights & Permissions [Opens in a new window]

Abstract

Optimal time of application of the isopropylamine salt of glyphosate for long-term control of foxtail barley was studied near Delta Junction, AK in 1992 and 1993. Applications of either 0.6 or 1.1 kg/ha of glyphosate with 2.2 kg/ha of ammonium sulfate and 0.5% (v/v) nonionic surfactant were made to different foxtail barley plots at approximately 2-wk intervals from May to September. Control was rated in July of the year following application. The 0.6 kg/ha rate produced ≤ 60% control on all application dates. At 1.1 kg/ha, foxtail barley control was best from applications made between early August and mid-September. May and mid-June applications provided up to 80% control in 1993 but ≤ 50% control in 1992. For both rates, applications made from late June through July, during foxtail barley flowering and seed fill, consistently provided little control (< 50%).

Keywords

Glyphosate, N-(phosphonomethyl)glycinefoxtail barley, Hordeum jubatum L. # HORJUPhenologytime of application
Type
Research
Information
Weed Technology , Volume 9 , Issue 2 , June 1995 , pp. 267 - 269
Copyright
Copyright © 1995 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. Blair, A. M. 1975. The addition of ammonium salts or a phosphate ester to herbicides to control Agropyron repens (L.) Beauv. Weed Res. 15:101–105.Google Scholar
2. Conn, J. S. 1987. Effects of tillage and cropping sequence on Alaskan weed vegetation: Studies on land under cultivation for eleven years. Soil Till. Res. 9:265–274.Google Scholar
3. Conn, J. S. 1990. Seed viability and dormancy of 17 weed species after burial for 4.7 years in Alaska. Weed Sci. 38:134–138.CrossRefGoogle Scholar
4. Conn, J. S. and Deck, R. E. 1991. Bluejoint reedgrass (Calamagrostis canadensis) control with glyphosate and additives. Weed Technol. 5:521–524.CrossRefGoogle Scholar
5. Cords, H. P. 1960. Factors affecting competitive ability of foxtail barley (Hordeum jubatum). Weeds 8:636–644.Google Scholar
6. 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.Google Scholar
7. Donald, W. W. 1988. Established foxtail barley, Hordeum jubatum, control with glyphosate plus ammonium sulfate. Weed Technol. 2:364–368.Google Scholar
8. Ivany, J. A. 1975. Effects of glyphosate application at different growth stages on quackgrass control. Can. J. Plant Sci. 55:861–863.Google Scholar
9. Jeffery, L. S., English, J. R., and Connell, J. 1981. The effect of fall application of glyphosate on corn (Zea mays), soybeans (Glycine max), and johnsongrass (Sorghum halpense). Weed Sci. 29:190–195.CrossRefGoogle Scholar
10. McAllister, R. S. and Haderlie, L. C. 1985. Translocation of 14C-labelled photoassimilates in Canada thistle (Cirsium arvense). Weed Sci. 33:153–159.Google Scholar
11. Moshier, L. J. 1980. Response of honey vine milkweed (Ampelamus albidus) to herbicide applications. Weed Sci. 28:722–724.Google Scholar
12. Rioux, R., Bandeen, J. D., and Anderson, G. W. 1974. Effects of growth stage on translocation of glyphosate in quackgrass. Can. J. Plant Sci. 54:397–401.Google Scholar
13. SAS Institute, Inc. 1988. SAS Procedures Guide. Release 6.03 ed. SAS Institute, Inc. Cary, NC.Google Scholar
14. Suwunnamek, U and Parker, C. 1975. Control of Cyperus rotundus with glyphosate: the influence of ammonium sulfate and other additives. Weed Res. 15:13–20.CrossRefGoogle Scholar
15. Turner, D. J. and Loader, M.C.P. 1980. Effects of ammonium sulfate and other additives upon the phytotoxicity of glyphosate to Agropyron repens (L.) Beauv. Weed Res. 20:139–146.CrossRefGoogle Scholar
16. Wills, G. D. and McWhorter, C. G. 1985. Effect of inorganic salts on the toxicity and translocation of glyphosate and MSMA in purple nutsedge (Cyperus rotundus). Weed Sci. 33:755–761.Google Scholar