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Downy Brome (Bromus tectorum) Interference and Economic Thresholds in Winter Wheat (Triticum aestivum)

Published online by Cambridge University Press:  12 June 2017

Phillip W. Stahlman  and
Stephen D. Miller
Phillip W. Stahlman
Affiliation:
Fort Hays Branch, Kansas Agric. Exp. Stn., Hays, KS 67601 and Dep. Plant, Soil, and Insect Sci., Univ. Wyoming, Laramie, WY 82071
Stephen D. Miller
Affiliation:
Fort Hays Branch, Kansas Agric. Exp. Stn., Hays, KS 67601 and Dep. Plant, Soil, and Insect Sci., Univ. Wyoming, Laramie, WY 82071
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Abstract

Densities up to 100 downy brome m2 were established in winter wheat in southeastern Wyoming and west-central Kansas to quantify wheat yield loss from downy brome interference and to approximate economic threshold levels. A quadratic equation best described wheat yield loss as a function of weed density when downy brome emerged within 14 days after wheat emergence. Densities of 24, 40, and 65 downy brome m2 reduced wheat yield by 10, 15, and 20%, respectively. Wheat yield was not reduced when downy brome emerged 21 or more days later than wheat. Economic thresholds varied with changes in downy brome density, cost of control, wheat price, and potential wheat yield. In a greenhouse experiment, dry weight of 72-day-old wheat plants grown in association with downy brome was not affected by the distance between the weeds and wheat, whereas downy brome plant dry weight increased with increasing distance between the weeds and wheat.

Keywords

Downy brome, Bromus tectorum L. ♯ BROTEwinter wheat, Triticum aestivum L.Competitionmodelingweed controlspace allocationBROTE
Type
Weed Biology and Ecology
Information
Weed Science , Volume 38 , Issue 3 , May 1990 , pp. 224 - 228
Copyright
Copyright © 1990 by the Weed Science Society of America 

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References

Literature Cited

1. 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
2. Buman, R. A., Monsen, S. B., and Abernethy, R. H. 1988. Seedling competition between mountain rye, ‘Hycrest’ crested wheatgrass, and downy brome. J. Range. Manage. 41:30–34.Google Scholar
3. Freund, R. J. and Littell, R. C. 1981. Covariance and Heterogeneity of Slopes. Pages 187–205 in SAS For Linear Models–A Guide to the ANOVA and GLM Procedures. SAS Inst., Inc., Cary, NC.Google Scholar
4. Gill, G. S., Poole, M. L., and Holmes, J.E. 1987. Competition between wheat and brome grass in Western Australia. Aust J. Exp. Agric. 27:291–294.Google Scholar
5. Harper, J. L. 1977. The Effects of Neighbours. Pages 151–381 in The Population Biology of Plants. Academic Press, London.Google Scholar
6. Martin, M.P.L.D. and Field, R. J. 1988. Influence of time of emergence of wild oat on competition with wheat. Weed Res. 28:111–116.CrossRefGoogle Scholar
7. Massee, T. W. 1976. Downy brome control in dryland winter wheat with stubble-mulch fallow and seeding management. Agron. J. 68:952–955.Google Scholar
8. 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
9. O'Donovan, J. T., de St. Remy, E. A., O'Sullivan, P. A., Dew, D. A., and Sharma, A. K. 1985. Influence of the relative time of emergence of wild oat (Avena fatua) on yield loss of barley (Hordeum vulgare) and wheat (Triticum aestivum). Weed Sci. 33:498–503.Google Scholar
10. Oliver, R. A. 1988. Principles of weed threshold research. Weed Technol. 2:398:403.Google Scholar
11. Ratliff, R. L. and Peeper, T. F. 1987. Bromus control in winter wheat (Triticum aestivum) with the ethylthio analog of metribuzin. Weed Technol. 1:235–241.CrossRefGoogle Scholar
12. Rydrych, D. J. 1974. Competition between winter wheat and downy brome. Weed Sci. 22:211–214.CrossRefGoogle Scholar
13. Rydrych, D. J. and Muzik, T. J. 1968. Downy brome competition and control in dryland wheat Agron. J. 60:279–280.Google Scholar
14. Stahlman, P. W. 1984. Downy brome (Bromus tectorum) control with diclofop in winter wheat (Triticum aestivum). Weed Sci. 32:59–62.Google Scholar
15. Zimdahl, R. L. 1980. Effect of Weed Density, and The Effect of Competition Duration. Pages 29–93 in Weed-Crop Competition: A Review. Plant Prot Ctr., Oregon State Univ., Corvallis, OR.Google Scholar