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Weed population responses to weed control practices. II. Residual effects on weed populations, control, and Glycine max yield

Published online by Cambridge University Press:  12 June 2017

Douglas D. Buhler
Douglas D. Buhler*
Affiliation:
U.S. Department of Agriculture, Agricultural Research Service, National Soil Tilth Laboratory, Ames, IA 50011; [email protected]
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Abstract

Weed populations, weed control with imazethapyr, and Glycine max yields were affected by a 4-yr history of different weed control practices. A range of chemical and mechanical practices were applied in separate field experiments initiated under high and low weed densities. In the high-density experiment, plots kept weed free for 4 yr averaged 24 Setaria faberi plants m−2 compared with 200 to 600 plants m−2 with the various weed control treatments. In plots with a history of mechanical control, weeds not controlled by imazethapyr reduced G. max yield by 340 kg ha−1 compared with plots that were kept weed free during the same period. In the low-density experiment, weed control history had less effect on weed densities. For example, S. faberi densities ranged from 19 plants m−2 for the weed-free plots to 195 plants m−2 with mechanical control. Weed control history had little effect on weed control with imazethapyr or G. max yields in imazethapyr-treated plots. While weed-free conditions for 4 yr greatly reduced weed densities, imazethapyr application still increased G. max yields 22% in the low-density experiment and 51% in the high-density experiment. Differences in densities of individual annual broadleaf species also developed in response to weed control history in both experiments.

Keywords

ImazethapyrSetaria faberi Herrm., giant foxtailGlycine max (L.) Merr., soybeanPopulation shiftsweed control systemsSETFA
Type
Weed Biology and Ecology
Information
Weed Science , Volume 47 , Issue 4 , August 1999 , pp. 423 - 426
Copyright
Copyright © 1999 by the Weed Science Society of America 

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References

Literature Cited

Buhler, D. D. 1949. Weed population responses to weed control practices. I. Seed bank, weed populations, and crop yields. Weed Sci. 47:416–422.Google Scholar
Buhler, D. D., Gunsolus, J. L., and Ralston, D. F. 1992. Integrated weed management techniques to reduce herbicide inputs in soybean. Agron. J. 84:973–978.Google Scholar
Buhler, D. D., Hartzler, R. G., and Forcella, F. 1997a. Implications of weed seed bank dynamics to weed management. Weed Sci. 45:329–336.Google Scholar
Buhler, D. D., Hartzler, R. G., Forcella, F., and Gunsolus, J. L. 1997b. Relative Emergence of Weeds of Corn and Soybean. Iowa State University Extension Pub. SA-11. 4 p.Google Scholar
Buhler, D. D., King, R. P., Swinton, S. M., Gunsolus, J. L., and Forcella, F. 1996. Field evaluation of a bioeconomic model for weed management in corn (Zea mays). Weed Sci. 44:915–923.Google Scholar
Cousens, R. and Mortimer, M. 1995. Pages 169–216 in Dynamics of Weed Populations. Cambridge, Great Britain: Cambridge University Press.Google Scholar
Gunsolus, J. L. 1999. Soybean weed management. Pages 56–68 in Gunsolus, J. L., Becker, R. L., Durgan, B. R., Lueschen, W. E., and Dexter, A. G., eds. Cultural and Chemical Weed Control in Field Crops-University of Minnesota Extension Service, AG-BU-3157-S.Google Scholar
Hartzler, R. G. and Buhler, D. D. 1998. Weed Seeds and the Seedbank: Implications for Weed Management. Iowa State University Extension Pub. IPM-48 (revised). 6 p.Google Scholar
Hartzler, R. G. and Roth, G. W. 1993. Effect of prior year's weed control on herbicide effectiveness in corn (Zea mays). Weed Technol. 7:611–614.Google Scholar
Khedir, K. D. and Roeth, F. W. 1981. Velvetleaf seed populations in six continuous corn fields. Weed Sci. 29:485–490.Google Scholar
Mester, T. C. and Buhler, D. D. 1990. Effects of seed depth on velvetleaf (Abutilon theophrasti) seedling development and response to cyanazine. Weed Sci. 38:34–38.Google Scholar
Norris, R. F. 1992. Have ecological and biological studies improved weed control strategies? Proc. First Int. Weed Control Congr. 1:7–33.Google Scholar
Winkle, M. E., Leavitt, J.R.C., and Burnside, O. C. 1981. Effects of weed density on herbicide absorption and bioactivity. Weed Sci. 29:405–409.Google Scholar