Hostname: page-component-586b7cd67f-tf8b9 Total loading time: 0 Render date: 2024-11-25T14:13:42.279Z Has data issue: false hasContentIssue false
  • English
  • Français

Propoxycarbazone-Sodium and Imazapic Effects on Downy Brome (Bromus tectorum) and Newly Seeded Perennial Grasses

Published online by Cambridge University Press:  20 January 2017

Gustavo M. Sbatella ,
Robert G. Wilson ,
Stephen F. Enloe  and
Charlie Hicks
Gustavo M. Sbatella*
Affiliation:
University of Nebraska, Scottsbluff, NE 69361
Robert G. Wilson
Affiliation:
University of Nebraska, Scottsbluff, NE 69361
Stephen F. Enloe
Affiliation:
Department of Plant Sciences, University of Wyoming, 1000 E. University Avenue, Laramie, WY 82071
Charlie Hicks
Affiliation:
Bayer CropScience: Livermore, CO 80536
*
Corresponding author's E-mail: [email protected]
Get access Rights & Permissions [Opens in a new window]

Abstract

Vigorous stands of perennial grasses can effectively provide long-term control of many invasive plants on rangelands. However, in degraded conditions, successful reestablishment of perennial grasses can be compromised by invasive annual grasses, such as downy brome. Propoxycarbazone-sodium is a selective herbicide currently labeled for downy brome control in small grains, but its potential use on rangelands is unknown. Studies were conducted from 2004 through 2008 at three rangeland sites in Colorado and Nebraska to evaluate downy brome control and perennial grass injury with propoxycarbazone-sodium and imazapic. Propoxycarbazone-sodium provided satisfactory downy brome control with grass injury equal to or less than imazapic when rainfall followed the fall application. A second set of studies was conducted from 2007 to 2008 at Lingle, WY, and Scottsbluff, NE, to determine the plant-back interval and postemergence application response of seven perennial grass species to propoxycarbazone-sodium and imazapic. Grass tolerance to both herbicides was good when applied 90 and 120 d before planting (DBP). However, grass injury increased as plant-back interval decreased. The greatest impact on plant biomass was observed from herbicide applied at planting or after planting. Crested and intermediate wheatgrass (Agropyron cristatum and Thinopyrum intermedium) biomass production was not affected when herbicides were applied 90 or 120 DBP. Western wheatgrass (Pascopyrum smithii) and Russian wildrye (Psathyrostachys juncea) showed tolerance to imazapic applied before planting. Smooth brome (Bromus inermis), sheep fescue (Festuca ovina), and orchardgrass (Dactylis glomerata) showed the least amount of tolerance to propoxycarbazone-sodium and imazapic.

Keywords

Propoxycarbazone-sodiumimazapicdowny brome, Bromus tectorum L.crested wheatgrass, Agropyron cristatum (L.) Gaertn.intermediate wheatgrass, Thinopyrum intermedium (Host) Barkworth & D.R. Deweyorchardgrass, Dactylis glomerata L.Russian wildrye, Psathyrostachys juncea (Fisch.) Nevskisheep fescue, Festuca ovina L.smooth brome, Bromus inermis Leyss.western wheatgrass, Pascopyrum smithii (Rydb.) Á. LövePerennial forageseedling establishmentmoistureapplication timing
Type
Research
Information
Invasive Plant Science and Management , Volume 4 , Issue 1 , March 2011 , pp. 78 - 86
Copyright
Copyright © 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

Aguirre, L. and Johnson, D. A. 1991. Influence of temperature and cheatgrass competition on seedling development of two bunchgrasses. J. Range Manag 44:347–354.Google Scholar
Harris, G. A. 1977. Root phenology as a factor of competition among grass seedlings. J. Range Manag 30:172–177.CrossRefGoogle Scholar
Knick, S. T. and Rotenberry, J. T. 1997. Landscape characteristics of disturbed shrubsteppe habitats in southwestern Idaho (U.S.A.). Landsc. Ecol 12:287–297.CrossRefGoogle Scholar
Morris, C., Monaco, T. A., and Rigby, C. 2009. Variable impacts of imazapic on downy brome (Bromus tectorum) and seeded species in two rangeland communities. Invasive Plant Sci. Manag 2:110–119.Google Scholar
Morrow, L. A. and Stahlman, P. W. 1984. The history and distribution of downy brome (Bromus tectorum) in North America. Weed Sci 32 (Suppl. 1):2–6.Google Scholar
Rose, K. K., Hild, A. L., Whitson, T. D., Koch, D. W., and Van Tassell, L. 2001. Competitive effects of cool-season grasses on re-establishment of three weed species. Weed Technol 15:885–891.Google Scholar
Sarmah, A. K. and Sabadie, J. 2002. Hydrolysis of sulfonylurea herbicides in soils and aqueous solutions: a review. J. Agric. Food Chem 50:6253–6265.Google Scholar
Sheley, R. L. 1995. Integrated rangeland weed management. Rangelands 17:222–223.Google Scholar
Shinn, S. L. and Thill, D. C. 2004. Tolerance to several perennial grasses to imazapic. Weed Technol 18:60–65.CrossRefGoogle Scholar
Thill, D. C., Beck, G., and Callihan, R. H. 1984. The biology of downy brome (Bromus tectorum). Weed Sci 32 (Suppl 1):7–12.CrossRefGoogle Scholar
Whitson, T. D. and Koch, D. W. 1998. Control of downy brome (Bromus tectorum) with herbicides and perennial grass competition. Weed Technol 12:391–396.Google Scholar