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Influence of the Relative Time of Emergence of Wild Oat (Avena fatua) on Yield Loss of Barley (Hordeum vulgare) and Wheat (Triticum aestivum)

Published online by Cambridge University Press:  12 June 2017

John T. O'Donovan ,
E. Ann De St. Remy ,
P. Ashely O'Sullivan ,
Don A. Dew  and
Arvind K. Sharma
John T. O'Donovan
Affiliation:
Alberta Environ. Center, Vegreville, Alberta T0B 4L0
E. Ann De St. Remy
Affiliation:
Agric. Can. Res. Stn., Lacombe, Alberta T0C 1S0
P. Ashely O'Sullivan
Affiliation:
Agric. Can. Res. Stn., Lacombe, Alberta T0C 1S0
Don A. Dew
Affiliation:
Agric. Can. Res. Stn., Lacombe, Alberta T0C 1S0
Arvind K. Sharma
Affiliation:
Alberta Environ. Center, Vegreville, Alberta T0B 4L0
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Abstract

Multiple regression analysis of data from field experiments conducted in Alberta at two locations between 1972 and 1983 indicated that there was a significant relationship between yield loss of barley (Hordeum vulgare L.) and wheat (Triticum aestivum L.) and relative time of emergence of wild oat (Avena fatua L. ♯ AVEFA). At a given wild oat density, percent yield loss increased the earlier wild oat emerged relative to the crops and gradually diminished the later it emerged. However, the magnitude of the yield loss for both species varied with the year. Regression equations based on data pooled over years and locations were developed to provide an estimate of yield loss of barley and wheat due to relative time of wild oat emergence and wild oat density. The information should be considered when barley and wheat losses due to wild oat are being assessed.

Keywords

Index of competitionwild oat densityAVEFA
Type
Weed Biology and Ecology
Information
Weed Science , Volume 33 , Issue 4 , July 1985 , pp. 498 - 503
Copyright
Copyright © 1985 by the Weed Science Society of America 

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References

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