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Wild Oat (Avena fatua) Infestations and Economic Returns as Influenced by Frequency of Control

Published online by Cambridge University Press:  12 June 2017

John T. O'Donovan*
Affiliation:
Alberta Environ. Cent., Vegreville T0B 4L0

Abstract

In continuous wheat or barley or in a canola/barley rotation, wild oat control every year over 4 yr maintained wild oat seedling populations at 3 plants/m2 or less. Failure to control wild oats annually increased wild oat populations (>200 plants/m2 by the fourth year) in continuous wheat dramatically, while in the other two cropping systems, populations increased to only 40 plants/m2 or less by the fourth year. In the continuous wheat and in the canola/barley rotation, wild oat control every year generally provided the best economic returns when prices and costs were averaged over 4 yr; in continuous barley, the average return was better when wild oats was controlled only in the second or third years rather than every year.

Type
Research
Copyright
Copyright © 1988 by the Weed Science Society of America 

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References

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