Hostname: page-component-586b7cd67f-vdxz6 Total loading time: 0 Render date: 2024-11-28T17:47:45.317Z Has data issue: false hasContentIssue false
  • English
  • Français

Corn Cockle (Agrostemma githago) Competition in Winter Wheat (Triticum aestivum)

Published online by Cambridge University Press:  12 June 2017

D. J. Rydrych
D. J. Rydrych*
Affiliation:
Oregon State Univ., Columbia Basin Agric. Res. Ctr., Pendleton Stn., Pendleton, OR 97801
Get access Rights & Permissions [Opens in a new window]

Abstract

The experiment was conducted during 3 yr to measure the effect of corn cockle (Agrostemma githago L.) competition on winter wheat (Triticum aestivum L. ‘McDermid’) grain yield. In all years corn cockle was removed monthly in separate treatments from emergence (October) to harvest (July). Hand-weeded and weedy controls were compared to herbicidal control using treatments of bromoxynil (3,5-dibromo-4-hydroxybenzonitrile). Reductions in yield of wheat as affected by competition from corn cockle were not significant if weeds were removed before February of each year in winter wheat that had been seeded the previous October. Bromoxynil controlled more weed plants when applied on corn cockle that had less than four leaves (fall treatment). Corn cockle densities of 170 to 340 plants/m2 at the Pendleton, Oregon site lowered wheat yields an average of 18% when competition was eliminated by March. Competition that continued until wheat harvest (July) reduced yields 60%.

Keywords

Weed densitiescereal yieldherbicidal control
Type
Research Article
Information
Weed Science , Volume 29 , Issue 3 , May 1981 , pp. 360 - 363
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

1. Appleby, A. P. and Rydrych, D. J. 1976. Selective control of weeds in field crops. Pages 35–38 in Hepworth, H., ed. Oregon Weed Control Handbook, Oregon State Univ. Ext. Serv., Corvallis.Google Scholar
2. Gilkey, H. M. 1957. Weeds of the Pacific Northwest. Oregon State College Press. Corvallis. 441 pp.Google Scholar
3. Hitchcock, C. L., Cronquist, A., Ownbey, M., and Thompson, J. W. 1964. Vascular plants of the Pacific Northwest. Univ. of Wash. Press. Seattle. 2:251–252.Google Scholar
4. Rydrych, D. J. 1974. Competition between winter wheat and downy brome. Weed Sci. 22:211–214.Google Scholar
5. Rydrych, D. J. and Burr, R. J. 1974. Herbicides for annual weed control in wheat in eastern Oregon. Oregon Agric. Ext. Serv. Circ. 811. 2 pp.Google Scholar
6. Steinbauer, G. P. and Grigsby, B. 1957. Interaction of temperature, light, and moistening agent in the germination of weed seeds. Weeds 5:175–182.Google Scholar
7. Swan, D. G. 1971. Competition of blue mustard with winter wheat. Weed Sci. 19:340–342.CrossRefGoogle Scholar