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Competition Between Kochia and Sugarbeets

Published online by Cambridge University Press:  12 June 2017

D. M. Weatherspoon  and
E. E. Schweizer
D. M. Weatherspoon
Affiliation:
Crops Research Division, Agr. Res. Serv., U. S. Dep. of Agr. in cooperation with the Botany and Plant Pathology Department, Colorado State University, Fort Collins, Colorado
E. E. Schweizer
Affiliation:
Crops Research Division, Agr. Res. Serv., U. S. Dep. of Agr. in cooperation with the Botany and Plant Pathology Department, Colorado State University, Fort Collins, Colorado
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Abstract

In a 2-year study, kochia [Kochia scoparia (L.) Schrad.] competed with sugarbeets (Beta vulgaris L.) for various periods after emergence. Kochia then was removed and plants that emerged subsequently were controlled by hand-weeding. Yield of sugarbeet roots was reduced when kochia competed for more than 5 or 6 weeks. Kochia that competed with sugarbeets for the entire season reduced yields more than 95%. In another study, kochia was controlled by frequent hand-weeding for different periods after sugarbeet emergence. When kochia was controlled initially for 3 to 4 weeks, yield of sugarbeets was not reduced. Some kochia emerged following the 3 to 4 weeks of hand-weeding. However, competition from sugarbeets reduced the weight of this kochia at harvest by 59 and 92%.

Type
Research Article
Information
Weed Science , Volume 17 , Issue 4 , October 1969 , pp. 464 - 467
Copyright
Copyright © 1969 Weed Science Society of America 

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References

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