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Wild Oat (Avena fatua) Competition with Spring Wheat: Plant Density Effects

Published online by Cambridge University Press:  12 June 2017

Harry L. Carlson  and
James E. Hill
Harry L. Carlson
Affiliation:
Tulelake Field Stn., and Ext. Agron., Univ. of California, Davis, CA 95616
James E. Hill
Affiliation:
Tulelake Field Stn., and Ext. Agron., Univ. of California, Davis, CA 95616
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Abstract

Field experiments were conducted to measure the grain yield of wheat (Triticum aestivum L. ‘ANZA’) at various wild oat (Avena fatua L. ♯ AVEFA) and wheat plant densities. Wheat yield declined as wild oat plant density increased. Wheat yield increased in wild oat-infested plots as wheat plant density increased. Regression models were developed to describe the combined effect of wheat and wild oat plant densities on wheat grain yield. Wheat yields were best described by a nonlinear regression model using the relative density of wild oat in the weed-crop stand as the dependent variable. Inclusion of crop stand as a competitive factor significantly improved the fit of all regression models tested. Wild oat were more competitive against wheat in these experiments than in experiments reported by others. Possible reasons for differences in observed competitiveness are discussed.

Keywords

Interferencegrain yieldAVEFA
Type
Weed Biology and Ecology
Information
Weed Science , Volume 33 , Issue 2 , March 1985 , pp. 176 - 181
Copyright
Copyright © 1985 by the Weed Science Society of America 

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References

Literature Cited

1. Appleby, A. P., Olson, P. D., and Colbert, D. R. 1976. Winter wheat yield reduction from interference by Italian ryegrass. Agron. J. 68:463–466.Google Scholar
2. Bell, A. R. and Nalewaja, J. P. 1968. Competition of wild oats in wheat and barley. Weed Sci. 16:505–508.Google Scholar
3. Bowden, B. A. and Friesen, G. 1967. Competition of wild oats (Avena fatua L.) in wheat and flax. Weed Res. 7:349–359.CrossRefGoogle Scholar
4. Dew, D. A. 1972. An index for estimating crop loss due to weeds. Can. J. Plant Sci. 52:921–927.CrossRefGoogle Scholar
5. Friesen, G. and Shebeski, L. H. 1960. Economic losses caused by weed competition in Manitoba grain fields. I. Weed species, their relative abundance and their effect on crop yields. Can. J. Plant Sci. 40:457–467.CrossRefGoogle Scholar
6. Godel, G. L. 1935. Relation between rate of seeding and yield of cereal crops in competition with weeds. Sci. Agric. 16:165–168.Google Scholar
7. Hamman, W. M. 1978. Field confirmation of an index for predicting yield losses of wheat and barley due to wild oat competition. Can. J. Plant Sci. 59:243–244.Google Scholar
8. Pfeiffer, R. K. and Holmes, H. M. 1961. A study of the competition between barley and oats as influenced by barley seed rate, nitrogen level and barban treatment. Weed Res. 1:15–18.Google Scholar
9. Thurston, J. M. 1962. The effect of competition from cereal crops on the germination and growth of Avena fatua L. in a naturally infested field. Weed Res. 2:192–207.CrossRefGoogle Scholar
10. Willy, R. W. and Heath, S. B. 1969. The quantitative relationships between plant population and crop yield. Adv. Agron. 21:281–321.Google Scholar