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Hemp sesbania interference in drill-seeded glyphosate-resistant soybean

  • Jason K. Norsworthy and Lawrence R. Oliver (a1)


Field experiments were conducted at Fayetteville, AR, in 1997, 1998, and 1999 to evaluate the degree of interspecific interference between drill-seeded, glyphosate-resistant soybean and hemp sesbania as influenced by soybean population, hemp sesbania density, and a single glyphosate application. Soybean was planted at 247,000, 430,000, and 618,000 seed ha−1 with early-season emergence of 217,000, 371,000, and 521,000 plants ha−1. Hemp sesbania densities were 0, 4, 10, and 16 plants m−2 in combination with 0 and 1.12 kg ai ha−1 glyphosate applied at the V4 to V6 soybean growth stage. Untreated hemp sesbania produced a maximum of 49 million seed ha−1 with 217,000 soybean ha−1, whereas seed production of glyphosate-treated hemp sesbania ranged from 2.8 to 0.6 million seed ha−1 with 217,000 and 521,000 soybean ha−1, respectively. Soybean seed yield was reduced 43% by 16 untreated hemp sesbania m−2, while glyphosate-treated hemp sesbania did not reduce seed yield. Averaged over all untreated hemp sesbania densities, soybean yield loss was reduced from 44 to 22% by increasing the soybean population from 217,000 to 521,000 plants ha−1. Because of the absence of soybean yield loss at 521,000 soybean ha−1, this density appears beneficial when using a single application of glyphosate to provide season-long weed control. However, a single glyphosate application in combination with a high soybean density did not completely prevent hemp sesbania seed production, and the seeding rate required to achieve a stand of 521,000 plants ha−1 would not be affordable; thus, alternate management methods targeting hemp sesbania must be employed to prevent an increase in the number of seed in the soil seedbank and to prevent a potential shift in the weed spectrum.


Corresponding author

Corresponding author. Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR 72704.


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Akey, W. C., Jurik, T. W., and Dekker, J. 1990. Competition for light between velvetleaf (Abutilon theophrasti) and soybean (Glycine max). Weed Res. 30:403411.
Aldrich, R. J. 1984. Weed-Crop Ecology—Principles in Weed Management. Belmont, CA: Wadsworth. p. 164.
Burnside, O. C. and Moomaw, R. S. 1977. Control weeds in narrow-row soybeans. Agron. J. 69:793796.
Dowler, C. 1997. Weed survey—southern states: broadleaf crops subsection. Proc. South. Weed Sci. Soc. 48:290325.
Egley, G. H. and Chandler, J. M. 1983. Longevity of weed seed after 5.5 years in the Stoneville 50-year buried-seed study. Weed Sci. 31:264270.
Flint, E. P., Patterson, D. T., Mortensen, D. A., Riechers, G. H., and Beyers, J. L. 1984. Temperature effects on growth and leaf production in three weed species. Weed Sci. 32:655663.
Geier, P. W., Maddux, L. D., Moshier, L. J., and Stahlman, P. W. 1996. Common sunflower (Helianthus annuus) interference in soybean (Glycine max). Weed Technol. 10:317321.
Johnston, T. J., Pendleton, J. W., Peters, D. B., and Hicks, D. R. 1969. Influence of supplemental light on apparent photosynthesis, yield and yield components of soybeans (Glycine max L.). Crop Sci. 9:577581.
Jordan, D. L., York, A. C., Griffin, J. L., Clay, P. A., Vidrine, P. R., and Reynolds, D. B. 1997. Influence of application variables on efficacy of glyphosate. Weed Technol. 11:354362.
Keisling, T. C., Oliver, L. R., Crowley, R. H., and Baldwin, F. L. 1984. Potential use of response surface analyses for weed management in soybeans (Glycine max). Weed Sci. 32:552557.
King, C. A. and Purcell, L. C. 1997. Interference between hemp sesbania (Hemp sesbania) and soybean (Glycine max) in response to irrigation and nitrogen. Weed Sci. 45:9197.
Knake, E. L. 1972. Effect of shade on giant foxtail. Weed Sci. 20:588592.
Knake, E. L. and Slife, F. W. 1962. Competition of Setaria faberi with corn and soybeans. Weeds 10:2629.
Lanie, A. J., Griffin, J. L., Vidrine, P. R., and Reynolds, D. B. 1994. Herbicide combinations for soybean (Glycine max) planted in stale seedbed. Weed Technol. 8:1722.
Lorenzi, H. J. and Jeffery, L. S. 1987. Weeds of the United States and their Control. New York: Van Nostrand Reinhold. p. 180.
Lovelace, M. L. and Oliver, L. R. 2000. Effects of interference and tillage on hemp sesbania and pitted morningglory emergence and seed production. Proc. South. Weed Sci. Soc. 53:202.
McWhorter, C. G. and Anderson, J. M. 1979. Hemp sesbania (Sesbania exaltata) competition in soybeans (Glycine max). Weed Sci. 27:5864.
Norsworthy, J. K. and Oliver, L. R. 2002. Pitted morningglory interference in drill-seeded glyphosate-resistant soybean. Weed Sci. 50:2633.
Oliver, L. R. 1979. Influence of soybean (Glycine max) planting date on velvetleaf (Abutilon theophrasti) competition. Weed Sci. 27:183188.
Oliver, L. R., Frans, R. E., and Talbert, R. E. 1976. Field competition between tall morningglory and soybean. I. Growth analysis. Weed Sci. 24:482488.
Patterson, D. T. 1979. The effects of shading on the growth and photosynthetic capacity of itchgrass (Rottboellia exaltata). Weed Sci. 27:549553.
Patterson, D. T. 1982. Shading responses of purple nutsedges (Cyperus rotundus and C. esculentus). Weed Sci. 30:2530.
Radosevich, S., Holt, J., and Ghersa, C. 1997. Weed Ecology: Implications for Management. New York: J. Wiley. pp. 144145.
[SAS] Statistical Analysis Systems. 1989. SAS User's Guide. Version 6, 4th ed, Volume II. Cary, NC: Statistical Analysis Systems Institute.
[SAS] Statistical Analysis Systems. 1997. SAS/STAT Software: Changes and Enhancements Through 6.12. Cary, NC: Statistical Analysis Systems Institute.
Shibles, R. M. and Weber, C. R. 1965. Leaf area, solar radiation interception and dry matter production by soybeans. Crop Sci. 5:575577.
Stoller, E. W., Harrison, S. K., Wax, L. M., Regnier, E. E., and Nafziger, E. D. 1987. Weed interference with soybeans (Glycine max). Rev. Weed Sci. 3:155181.
Stoller, E. W. and Woolley, J. T. 1985. Competition for light by broadleaf weeds in soybeans (Glycine max). Weed Sci. 33:199202.
Wood, M. L., Murray, D. S., Westerman, R. B., Verhalen, L. M., and Claypool, P. L. 1999. Full-season interference of Ipomoea hederacea with Gossypium hirsutum . Weed Sci. 47:693696.
Zhang, L. X., Wang, R. F., and Hesketh, J. D. 1995. Separating photoperiod and temperature effects on growing degree day requirement for floral events in soybean. Biotronics 24:5964.



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