Skip to main content Accessibility help
×
Home

An Economic Threshold Model for Weeds in Soybeans (Glycine max)

  • Michele C. Marra (a1) and Gerald A. Carlson (a1)

Abstract

A model for determination of economic thresholds, or minimum weed population densities justifying the use of postemergence herbicide treatment, for five weed species in soybeans [Glycine max (L.) Merr.] is presented. Sensitivity analysis was performed on the model with respect to economic, statistical, and agronomic variables. The model was refined to include uncertainty about lost field days during the spraying period. Predictions from both the simple and refined models were consistent with economic theory. It was also determined that the economic threshold is sensitive to choice of data-collection ranges and functional form in weed-interference studies.

Copyright

References

Hide All
1. Anderson, J. R., Dillon, J. L., and Hardaker, J. B. 1977. Agricultural Decision Analysis. Iowa St. Univ. Press, Ames, Iowa. 344.
2. Barrentine, W. L. 1974. Common cocklebur competition in soybeans. Weed Sci. 22:600603.
3. Coble, H. D. and Ritter, R. L. 1978. Pennsylvania smartweed (Polygonum pensylvanicum) interference in soybeans (Glycine max). Weed Sci. 26:556559.
4. Gardner, B. 1976. Futures prices in supply analysis. Am. J. Agric. Econ. 58:8184.
5. Headley, J. C. 1972. Defining the economic threshold. Pages 100108 in Pest Control Strategy for the Future. Nat. Acad. Sci. Washington, DC.
6. Moolani, M. K., Knake, E. L., and Slife, F. W. 1964. Competition of smooth pigweed with corn and soybeans. Weeds 12:126128.
7. Nicholson, W. 1978. Pages 262 to 267 in Microeconomic Theory, The Dryden Press, Hinsdale, IL.
8. Staniforth, D. W. 1958. Soybean-Foxtail competition under varying moisture conditions. Agron. J. 50:1315.
9. Theil, H. 1971. Principles of Econometrics. John Wiley & Sons, Inc., New York, NY. 735.
10. Thompson, W. R. Jr. 1981. Ten steps to higher soybeans and profits. Sp. Suppl. to Progr. Farm. 96(1): 1516.
11. Wilson, H. P. and Cole, R. H. 1966. Morningglory competition in soybeans. Weeds 14:4951.

Keywords

An Economic Threshold Model for Weeds in Soybeans (Glycine max)

  • Michele C. Marra (a1) and Gerald A. Carlson (a1)

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed