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Downy Brome (Bromus tectorum) Interference in Winter Rye (Secale cereale)

Published online by Cambridge University Press:  12 June 2017

Robert E. Blackshaw
Robert E. Blackshaw*
Affiliation:
Agric. Canada Res. Stn., Lethbridge, AB, Canada T1J 4B1
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Abstract

Field experiments over 3 yr at Lethbridge, Alberta, determined the effect of various downy brome densities and times of its emergence on winter rye biomass and seed yield. Downy brome reduced yields most when it emerged within 3 wk of rye, but densities of more than 100 downy brome m-2 were required to reduce yields by 20 to 30%. The greatest reductions in rye biomass (28%) and seed (33%) yields over the 3 yr occurred when 400 downy brome m-2 emerged with the crop. Downy brome, at densities up to 400 plants m-2, emerging 6 wk after rye or in early spring, reduced rye biomass and seed yield less than 10% in all years. Winter rye effectively shaded downy brome (40 to 90%) for much of the growing season.

Keywords

Downy brome, Bromus tectorum L. # BROTEwinter rye, Secale cereale L. ‘Kodiak’Competitionphotosynthetically active radiationweed biomassrye biomassrye seedBROTE
Type
Weed Biology and Ecology
Information
Weed Science , Volume 41 , Issue 4 , December 1993 , pp. 557 - 562
Copyright
Copyright © 1994 by the Weed Science Society of America 

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References

Literature Cited

1. Agriculture Canada. 1992. Fall rye reference manual. Agdex 117–20, Agric. Can., Ottawa, ON. 46 pp.Google Scholar
2. Alberta Agriculture. 1992. Pages 31–152 in Crop protection with chemicals. Agdex 606-1, Alberta Agric., Edmonton, AB.Google Scholar
3. Berkowitz, A. R. 1988. Competition for resources in weed-crop mixtures. Pages 90–119; in Altieri, M. A. and Liebman, M., eds. Weed Management in Agroecosystems: Ecological Approaches. CRC Press, Inc., Boca Raton, FL.Google Scholar
4. Blackshaw, R. E. 1993. Downy brome (Bromus tectorum) density and relative time of emergence affects interference in winter wheat (Triticum aestivum). Weed Sci. 41:551–556.CrossRefGoogle Scholar
5. Bookman, P. A. and Mack, R. N. 1983. Competition between Bromus tectorum L. and Poa pratensis L.: the role of light. Oecologia 57:406–411.Google Scholar
6. Cousens, R. 1985. A simple model relating yield loss to weed density. Ann. Appl. Biol. 107:239–252.Google Scholar
7. Douglas, , Thomas, B. L. A. G., and Derksen, D. A. 1990. Downy brome (Bromus tectorum) invasion into southwestern Saskatchewan. Can. J. Plant Sci. 70:1143–1151.CrossRefGoogle Scholar
8. Fowler, D. B. 1982. Date of seeding, fall growth, and winter survival of winter wheat and rye. Agron. J. 74:1060–1063.CrossRefGoogle Scholar
9. Fowler, D. B. and Gusta, L. V. 1977. Influence of fall growth and development on cold tolerance of rye and wheat. Can. J. Plant Sci. 57:751–755.Google Scholar
10. Gallant, A. R. 1987. Nonlinear Statistical Models. John Wiley & Sons, New York. 610 pp.CrossRefGoogle Scholar
11. Joenje, W. and Kropff, M. J. 1987. Factors in crop-weed competition. Pages 971–978 in Proc. Br. Crop Prot. Conf.—Weeds.Google Scholar
12. Kilcher, M. R. 1982. Effect of cattle grazing on subsequent grain yield of fall rye (Secale cereale L.) in southwestern Saskatchewan. Can. J. Plant Sci. 62:795–796.CrossRefGoogle Scholar
13. Rydrych, D. J. 1974. Competition between winter wheat and downy brome. Weed Sci. 22:211–214.CrossRefGoogle Scholar
14. Rydrych, D. J. and Muzik, T. J. 1968. Downy brome competition and control in dryland wheat. Agron. J. 60:279–280.Google Scholar
15. Schwerdtle, F. 1983. Weed control in winter wheat. Pages 283–301 in New Frontiers in Winter Wheat production. Univ. Saskatchewan, Saskatoon, SK.Google Scholar
16. Stahlman, P. W. and Miller, S. D. 1990. Downy brome (Bromus tectorum) interference and economic thresholds in winter wheat (Triticum aestivum). Weed Sci. 38:224–228.Google Scholar
17. Upadhyaya, M. K., Turkington, R., and McIlvride, D. 1986. The biology of Canadian weeds. 75. Bromus tectorum L. Can. J. Plant Sci. 66:689–709.Google Scholar
18. Wicks, G. A. 1984. Integrated systems for control and management of downy brome (Bromus tectorum) in cropland. Weed Sci. 32, Suppl. 1:26–31.CrossRefGoogle Scholar