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Wild Oat (Avena fatua) Competition in Soybean (Glycine max)

Published online by Cambridge University Press:  12 June 2017

Duane P. Rathmann  and
Stephen D. Miller
Duane P. Rathmann
Affiliation:
Dep. Agron., North Dakota State Univ., Fargo, ND 58105
Stephen D. Miller
Affiliation:
Dep. Agron., North Dakota State Univ., Fargo, ND 58105
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Abstract

The effects of various densities and durations of wild oat (Avena fatua L.) competition in soybean [Glycine max (L.) Merr. ‘Evans’] were determined in the field during a 2-yr period. Season-long competition by densities of 1, 3,9, and 30 wild oat plants/m of row reduced soybean seed yield an average of 6, 17, 32, and 51%, respectively. An infestation of 30 wild oat plants/m of row did not reduce soybean yield if the period of competition was limited to 4 weeks after crop emergence; however, yields were reduced 29, 50, 63, 58, and 63% when wild oat competed for 5, 6, 7, and 8 weeks, or season long, respectively. Wild oat competition reduced soybean pods per plant and seeds per plant more than seeds per pod or seed weight.

Keywords

Densitydurationyield
Type
Research Article
Information
Weed Science , Volume 29 , Issue 4 , July 1981 , pp. 410 - 414
Copyright
Copyright © 1981 by the Weed Science Society of America 

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References

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