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Competition Between Irrigated Sugar Beets and Annual Weeds

Published online by Cambridge University Press:  12 June 2017

J. H. Dawson
J. H. Dawson*
Affiliation:
Crops Research Division, Agricultural Research Service, U. S. Department of Agriculture, Irrigation Experiment Station, Prosser, Washington
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Abstract and summary

Experiments of two types were conducted. (1) Weeds were allowed to grow for different periods after planting sugar beets; they were then removed and the beets hand-weeded until harvest. (2) Sugar beets were hand-weeded for different periods after planting; then no further weeding was done. Weed competition reduced beet yields up to 94%. Weeds that emerged soon after beet planting reduced yields the most, but they exerted little yield-reducing competition until later than 12 weeks after planting the beets (9 weeks after beet emergence). Full-season weed control resulted when beets were hand-weeded for 10 to 12 weeks after planting. Weeds that emerged later were controlled by crop competition.

Type
Research Article
Information
Weeds , Volume 13 , Issue 3 , July 1965 , pp. 245 - 249
Copyright
Copyright © 1965 Weed Science Society of America 

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References

Literature Cited

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