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Influence of Johnsongrass (Sorghum halepense) Density and Period of Competition on Cotton Yield

Published online by Cambridge University Press:  12 June 2017

David C. Bridges  and
James M. Chandler
David C. Bridges
Affiliation:
Soil & Crop Sci. Dep., Texas Agric. Exp. Stn., College Station, TX 77843-2474. TAES J. No. 21632
James M. Chandler
Affiliation:
Soil & Crop Sci. Dep., Texas Agric. Exp. Stn., College Station, TX 77843-2474. TAES J. No. 21632
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Abstract

Research was conducted from 1982 through 1984 on a Shipps clay soil (Udic chromustert) in east-central Texas to determine the density-dependent effects and critical periods of johnsongrass [Sorghum halepense (L.) Pers. # SORHA] competition with cotton (Gossypium hirsutum L.). Two experiments were conducted each year, one to assess cotton yield response to increasing johnsongrass density and the second to establish the johnsongrass-free requirement of cotton and the johnsongrass competition period. A critical minimum density of 2 plants/9.8 m of row was observed. Full-season johnsongrass competition densities exceeding 2 plants/9.8 m of row resulted in seed cotton yield reductions each year. Yield decline was most rapid as density increased from 2 to 8 plants/9.8 m of row. Yield loss averaged 1, 4, 14, 40, 65, and 70% for johnsongrass densities of 1, 2, 4, 8, 16, and 32 plants/9.8 m of row, respectively. Percent yield loss was proportional to yield potential at johnsongrass densities of 4 and 8 plants/9.8 m of row. Three to four weeks of rhizome johnsongrass competition or 6 weeks of seedling johnsongrass competition resulted in significant yield reductions. Maintaining cotton johnsongrass free for 4 weeks did not prevent significant yield reductions.

Keywords

Critical minimum densitycompetitive thresholdinterspecific competitionintraspecific competitionGossypium hirsutumSORHA
Type
Weed Biology and Ecology
Information
Weed Science , Volume 35 , Issue 1 , January 1987 , pp. 63 - 67
Copyright
Copyright © 1987 by the 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. Chandler, J. M. 1977. Competition of spurred anoda, velvetleaf, prickly sida, and venice mallow in cotton. Weed Sci. 25:151–158.Google Scholar
3. Elmore, C. D. 1984. Weed Survey – Southern States in Res. Rpt. South. Weed Sci. Soc. 37:193–196.Google Scholar
4. Holm, L. G., Plucknett, D. L., Pancho, J. V., and Herberger, J. P. 1977. The World's Worst Weeds, Distribution and Biology. 1st ed. Univ. Press of Hawaii, Honolulu, Hawaii. Pages 54–55.Google Scholar
5. Jordan, T. N., Baker, R. S., and Barrentine, W. L. 1978. Comparative toxicity of several dinitroaniline herbicides. Weed Sci. 26:72–75.Google Scholar
6. Keeley, P. E. and Thullen, R. J. 1981. Control and competitiveness of johnsongrass (Sorghum halepense) in cotton. Weed Sci. 29:356–359.CrossRefGoogle Scholar
7. Lolas, P. C. and Coble, H. D. 1981. Noncompetitive effects of johnsongrass (Sorghum halepense) on soybeans (Glycine max.) Weed Sci. 30:589–593.Google Scholar
8. McWhorter, C. G. and Hartwig, E. E. 1972. Competition of johnsongrass and cocklebur with six soybean varieties. Weed Sci. 20:56–59.CrossRefGoogle Scholar
9. Patterson, M. G., Buchanan, G. A., Street, J. E., and Crowley, R. H. 1980. Yellow nutsedge (Cyperus esculentus) competition with cotton (Gossypium hirsutum). Weed Sci. 28:327–329.Google Scholar
10. Williams, C. S. and Hayes, R. M. 1984. Johnsongrass (Sorghum halepense) competition in soybeans (Glycine max). Weed Sci. 32:498–501.Google Scholar