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Broadleaf Weed Interference in Sugarbeets (Beta vulgaris)

Published online by Cambridge University Press:  12 June 2017

E. E. Schweizer
E. E. Schweizer*
Affiliation:
Sci. Ed. Admin., U.S. Dep. Agric., Crops Res. Lab., Colorado State Univ., Fort Collins, CO 80523
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Abstract

Interference within a mixture of equal densities of common lambsquarters (Chenopodium album L.), kochia [Kochia scoparia (L.) Schrad.], and redroot pigweed (Amaranthus retroflexus L.) in sugarbeets (Beta vulgaris L. ‘Mono Hy D2’) was determined in a 3-yr field study. Yield of sugarbeet roots and sucrose per hectare decreased as intensity of competition from equal populations of these three weeds increased. At densities of 6, 12, 18, and 24 broadleaf weeds per 30 m of row, root yields were reduced 13, 24, 33, and 39%, respectively. Sucrose yields were reduced similarly. Fewer than three weeds per 30 m of row did not significantly reduce root yield. Reduction in root yield (Y) of sugarbeets caused by specific densities (X) of the three broadleaf weeds was predicted by using the linear equation Y = 1.64 + 1.88 X. The actual reductions in yield were always less than the predicted reductions when this equation was tested against 36 weed control systems because the competitive ability of broadleaf weeds that were treated with herbicides, but not killed, was suppressed during the growing season. By harvest, broadleaf weeds present in weed-control-system plots weighed an average of 75 to 85% less than broadleaf weeds present in nontreated plots.

Keywords

Amaranthus retroflexusChenopodium albumKochia scopariaweed losseseconomic thresholdscompetition
Type
Research Article
Information
Weed Science , Volume 29 , Issue 1 , January 1981 , pp. 128 - 133
Copyright
Copyright © 1981 by the Weed Science Society of America 

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References

Literature Cited

1. Anonymous. 1965. Losses in agriculture. U.S. Dep. Agric., Agric. Handbook 291, 120 pp.Google Scholar
2. Bray, W. E. and Hilton, J. G. 1970. Weed control in sugar beet using diallate followed by pyrazone or lenacil. Proc. Br. Weed Control Conf. 10:586–592.Google Scholar
3. Dawson, J. H. 1969. Evaluation of herbicides applied to the soil for weed control in irrigated sugarbeets. Washington Agric. Exp. Stn. Bull. 708:1–11.Google Scholar
4. Dawson, J. H. 1975. Cycloate and phenmedipham as complementary treatments in sugarbeets. Weed Sci. 23:478–485.Google Scholar
5. Hendrick, L. W., Meggitt, W. F., and Penner, D. 1974. Selective use of phenmedipham and EP-475 in Michigan for weed control in sugarbeets. J. Am. Soc. Sugar Beet Technol. 18:97–107.CrossRefGoogle Scholar
6. Knake, E. L. and Slife, F. W. 1962. Competition of Setaria faberii with corn and soybeans. Weeds 10:26–29.CrossRefGoogle Scholar
7. Moolani, M. K., Knake, E. L., and Slife, F. W. 1964. Competition of smooth pigweed with corn and soybeans. Weeds 12:126–128.Google Scholar
8. Schweizer, E. E. and Weatherspoon, D. M. 1968. Herbicidal control of weeds in sugarbeets. J. Am. Soc. Sugar Beet Technol. 15:263–276.CrossRefGoogle Scholar
9. Schweizer, E. E. 1973. Predicting sugarbeet root losses based on kochia densities. Weed Sci. 21:565–567.Google Scholar
10. Schweizer, E. E. 1974. Weed control in sugarbeets with cycloate, phenmedipham and EP-475. Weed Res. 14:39–44.Google Scholar
11. Schweizer, E. E. 1980. Herbicides applied sequentially for economical control of annual weeds in sugarbeets (Beta vulgaris . Weed Sci. 28:152–159.Google Scholar
12. Sullivan, E. F., Fagala, L. K., and Ross, C. G. 1972. Herbicide evaluations on sugarbeet, 1972. North Cent. Weed Control Conf. Res. Rep. 29:130–132.Google Scholar
13. Thomas, T. M. and Burke, J. 1975. Sequential application of herbicides for season long weed control in sugar beet. Proc. 3rd Int. Meeting Selective Weed-Control in Beet Crops, Paris. pp 21–38.Google Scholar
14. U.S. Department of Agriculture. 1980. Crop values (1977–1978–1979) – season average prices received by farmers and value of production. Crop Prod. 2–1 (80). 29 pp.Google Scholar
15. Zimdahl, R. L. 1980. Weed-crop competition, a review. Int. Plant Prot. Center, Oregon State Univ., Corvallis. 195 pp.Google Scholar