Hostname: page-component-669899f699-2mbcq Total loading time: 0 Render date: 2025-04-27T17:50:12.269Z Has data issue: false hasContentIssue false
  • English
  • Français

Effects of Aminocyclopyrachlor Herbicide on Downy Brome (Bromus tectorum) Seed Production under Field Conditions

Published online by Cambridge University Press:  20 January 2017

Daniel A. Ball
Daniel A. Ball*
Affiliation:
Weed Science, Oregon State University, Columbia Basin Agricultural Research Center, Pendleton, OR 97801
*
Corresponding author's E-mail: daniel.ball@oregonstate.edu
Get access Rights & Permissions [Opens in a new window]

Abstract

Previous research has shown that pyridine growth regulator herbicides can affect seed production in annual grasses including downy brome, Japanese brome, wheat, and other cereal grain crops. Aminocyclopyrachlor is a pyridine carboxylic acid growth regulator herbicide that has recently been registered for broadleaf weed and brush control in nonagricultural areas, which may help facilitate release of native perennial grasses in native plant restoration sites. The influence of aminocyclopyrachlor on downy brome seed production was evaluated at multiple application rates and timings under controlled field conditions. The effect of aminocyclopyrachlor on seed production was compared with aminopyralid, another pyridine growth regulator herbicide. When applied to downy brome plants in the early vegetative stage (EPOST) at approximately 580 growing degree days (GDD), aminocyclopyrachlor at 320 g ae ha−1 reduced seed germination by 50 to 88% in the first and second study years, respectively. Aminopyralid reduced seed germination by 94% in the first study year, but only 20% in the second year. When applied to downy brome plants in the early heading stage at approximately 1,235 GDD (LPOST), aminocyclopyrachlor at 320 g ae ha−1 reduced seed germination by 100% both years. Aminopyralid reduced seed germination by 95% in the first year, and 81% in the second year. Other than the observed reduction in seed germination, herbicides did not produce any visible changes in downy brome aboveground plant growth or development. Because downy brome seeds are relatively short-lived in soil, aminocyclopyrachlor and aminopyralid applications to downy brome–infested rangelands and other natural areas could result in reductions in downy brome population densities over time. No published data exist on the effect of aminocyclopyrachlor on seed production of desirable perennial grasses in natural ecosystems, thereby suggesting the need for further research.

Keywords

Aminocyclopyrachlor, formerly DPX MAT28, 6-amino-5-chloro-2-cyclopropylpyrimidine-4-carboxylic acidaminopyralid, 4-amino-3,6-dichloropyridine-2-carboxylic aciddowny brome, Bromus tectorum L. BROTEJapanese brome, Bromus japonicus Thunb. ex Murr. BROJAwheat, Triticum aestivum L.Chemical controlgrowing degree daygrowth regulator herbicideinvasive speciesnative plant communitiespyridine carboxylic acidpyridine herbiciderangeland
Type
Research Article
Information
Invasive Plant Science and Management , Volume 7 , Issue 4 , December 2014 , pp. 561 - 564
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.)

Article purchase

Temporarily unavailable

References

Literature Cited

Anderson, AF (1989) How important is seed predation to recruitment in stable populations of long-lived perennials? Oecologia 81:310–315 Google Scholar
Anonymous (2009) DuPont: DPX-MAT28 Technical Bulletin. E.I. du Pont de Nemours and Company. https://lists.alaska.edu/pipermail/cnipm-l/attachments/20090310/f10dfb94/MAT28TechBulletin.pdf. Accessed: May 28, 2014Google Scholar
Ball, DA, Frost, SM, Gitelman, AI (2004) Predicting timing of downy brome (Bromus tectorum) seed production using growing degree-days. Weed Sci 52:518–524 Google Scholar
Billings, WD (1990) Bromus tectorum, a biotic cause of ecosystem impoverishment in the Great Basin. Pages 310–322 in Woodwell, GM, ed. Patterns and Processes of Biotic Impoverishment. New York Cambridge University Press Google Scholar
Canode, CL, Robocker, WC (1966) Annual weed control in seedling grasses. Weeds 14:306–309 Google Scholar
Friesen, HA, Born, WHV, Keys, CH, Dryden, RD, Molberg, ES, Siemens, B (1968) Effect of time of application and dosage of dicamba on tolerance of wheat, oats and barley. Can J Plant Sci 48:213–215 Google Scholar
Harmoney, KR, Stahlman, PW, Geier, PW, Rupp, R (2012) Effects of a new herbicide (aminocyclopyrachlor) on buffalograss and forbs in shortgrass prairie. Weed Technol 26:455–459 Google Scholar
Kniss, AR, Lyon, DJ (2011) Winter wheat response to preplant applications of aminocyclopyrachlor. Weed Technol 25:51–57 Google Scholar
Lindenmayer, B, Westra, P, Nissen, S, Shaner, D (2011) Characterization of aminocyclopyrachlor, aminopyralid, and clopyralid soil activity. Pages 64 in 2011 Proceedings Western Society of Weed Science. Spokane, WA Western Society of Weed Science Google Scholar
Martin, DA, Miller, SD, Alley, HP (1989) Winter wheat (Triticum aestivum) response to herbicides applied at three growth stages. Weed Technol 3:90–94 Google Scholar
Peart, DR (1989) Species interactions in a successional grassland, I. Seed rain and seedling recruitment. J Ecol 77:236–251 Google Scholar
Reed, TV, Yu, J, McCullough, RE (2013) Aminocyclopyrachlor efficacy for controlling Virginia buttonweed (Diodia virginiana) and smooth crabgrass (Digitaria ischaemum) in tall fescue. Weed Technol 27:488–491 Google Scholar
Rinella, MJ, Haferkamp, MR, Masters, RA, Muscha, JM, Bellows, SE, Vermeire, LT (2010a) Growth regulator herbicides prevent invasive annual grass seed production. Invasive Plant Sci Manag 3:12–16 Google Scholar
Rinella, MJ, Masters, RA, Bellows, SE (2010b) Growth regulator herbicides prevent invasive annual grass seed production under field conditions. Rangeland Ecol Manag 63:487–490 Google Scholar
Rinella, MJ, Masters, RA, Bellows, SE (2013) Effects of growth regulator herbicides on downy brome (Bromus tectorum) seed production. Invasive Plant Sci Manag 6:60–64 Google Scholar
Schroeder, J, Banks, PA (1989) Soft red winter wheat (Triticum aestivum) response to dicamba and dicamba plus 2,4-D. Weed Technol 3:67–71 Google Scholar
Senseman, SA (ed.) (2007) Herbicide Handbook, 9th edn. Champaign, IL Weed Science Society of America. Pp. 331–332 Google Scholar
Thill, DC, Schirman, RD, Appleby, AP (1980) Influence of afterripening temperature and endogenous rhythms on downy brome (Bromus tectorum) germination. Weed Sci 28:321–323 Google Scholar
Vanden Born, WH (1965) The effect of dicamba and picloram on quackgrass, bromegrass and Kentucky bluegrass. Weeds 13:309–312 Google Scholar
Wallace, J, Prather, T (2012a) Response of native grassland forbs and shrubs to various rates of aminocyclopyrachlor. Pages 15–16 in 2012 Research Progress Report. Las Cruces, NM Western Society of Weed Science Google Scholar
Wallace, J, Prather, T (2012b) Tolerance of perennial pasture grass seedlings to aminocyclopyrachlor at two growth stages. Pages 17–19 in 2012 Research Progress Report. Las Cruces, NM Western Society of Weed Science Google Scholar
Young, JA, Evans, RA (1978) Population dynamics after wildfires in sagebrush grasslands. J Range Manage 31(4):283–289 Google Scholar