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Competition of Sicklepod with Soybeans

Published online by Cambridge University Press:  12 June 2017

Donald L. Thurlow  and
Gale A. Buchanan
Donald L. Thurlow
Affiliation:
Dep. of Agron. and Soils, Auburn Univ. Agr. Exp. Sta., Auburn, Alabama 36830
Gale A. Buchanan
Affiliation:
Dep. of Agron. and Soils, Auburn Univ. Agr. Exp. Sta., Auburn, Alabama 36830
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Abstract

The competitive effects of sicklepod (Cassia obtusifolia L.) on soybeans (Glycine max L. ‘Bragg’) were studied on Malbis sandy loam soil and Chesterfield sandy loam soil during 1968 to 1970. Weed density was a linear function of soybean yield for the densities studied (0 to 15 weeds/m2). The regression coefficient of weed density (weeds per square meter) on bean yield (kilograms per hectare) was −92 and −101 for the two soils, respectively. When the data were combined across both soils and years, the regression coefficient was −95. Densities of 7.7 weeds/m2 reduced soybean yield 19 to 32% and 34 to 35% on the two soils, respectively. The weight of weeds at harvest was also inversely correlated to soybean yield. Sicklepod was more competitive when grown 15 to 30 cm from the drill than in the drill. Soybean yields were reduced in some instances when sicklepod was allowed to compete for as little as 4 weeks. If weeds were removed at 2 to 4 weeks after soybean emergence, no further weed removal was needed for maximum yield of soybeans.

Type
Research Article
Information
Weed Science , Volume 20 , Issue 4 , July 1972 , pp. 379 - 384
Copyright
Copyright © Weed Science Society of America 

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References

Literature Cited

1. Buchanan, G. A. and Burns, E. R. 1970. Influence of weed competition on cotton. Weed Sci. 18:149–154.Google Scholar
2. Buchanan, G. A. and Burns, E. R. 1971. Weed competition in cotton I. Sicklepod and tall morningglory. Weed Sci. 19:576–579.CrossRefGoogle Scholar
3. Burnside, O. C. and Wicks, G. A. 1967. The effect of weed removal treatments on sorghum growth. Weeds 15:204–207.CrossRefGoogle Scholar
4. Creel, J. M. Jr., Hoveland, C. S., and Buchanan, G. A. 1968. Germination, growth and ecology of sicklepod. Weed Sci. 16:396–400.CrossRefGoogle Scholar
5. Dawson, J. H. 1965. Competition between irrigated field beans and annual weeds. Weeds 13:206–208.Google Scholar
6. Dawson, J. H. 1965. Competition between irrigated sugar beets and annual weeds. Weeds 13:245–249.Google Scholar
7. Hill, L. V. and Santelmann, P. W. 1969. Competitive effects of annual weeds on Spanish peanuts. Weed Sci. 17:1–2.Google Scholar
8. Knake, E. L. and Slife, F. W. 1965. Giant foxtail seeded at various times in corn and soybeans. Weeds 13:331–334.Google Scholar
9. 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
10. Peters, E. H., Gebhardt, M. R., and Stritzke, J. F. 1965. Interrelations of row spacing, cultivation and herbicides for weed control in soybeans. Weed Sci. 13:285–289.Google Scholar
11. Staniforth, D. W. 1962. Responses of soybean varieties to weed competition. Agron. J. 54:11–13.Google Scholar
12. Staniforth, D. W. 1965. Competitive effects of three foxtail species on soybeans. Weeds 13:191–193.Google Scholar
13. Wax, L. M. and Pendleton, J. W. 1968. Effect of row spacing on weed control in soybeans. Weed Sci. 16:462–465.Google Scholar
14. Weatherspoon, D. M. and Schweizer, E. E. 1969. Competition between kochia and sugar beets. Weed Sci. 17: 464–467.Google Scholar
15. Wheatley, L. E. and Cole, R. H. 1967. Weed competition in soybeans. Proc. Northeast Weed Contr. Conf. 21: 567–574.Google Scholar
16. Wilson, H. P. and Cole, R. H. 1966. Morningglory competition in soybeans. Weeds 14:49–51.Google Scholar