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Use of Modeling in Developing Label Restrictions for Agricultural Chemicals

Published online by Cambridge University Press:  12 June 2017

Russell L. Jones
Russell L. Jones*
Affiliation:
Rhone-Poulenc Ag Company, P.O. Box 12014, Research Triangle Park, NC 27709
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Abstract

The movement and degradation of agricultural chemicals in soil and groundwater is a complex process, influenced by climatic conditions, site characteristics, chemical properties, and agricultural practices. Because of this complexity, mechanistic models are useful tools in evaluating environmental fate. Although currently available unsaturated zone models often do not provide accurate concentration profiles when compared with field measurements, they can be used to estimate the depth and extent of movement. Another application of modeling is to compare predicted movement under different simulation conditions to determine the significance of the various factors affecting the behavior of agricultural chemicals. When properly designed and interpreted, modeling studies can contribute to the understanding of the environmental fate of agricultural chemicals. When necessary, modeling can also be useful in developing management practices included on the label or in state regulations. Modeling has been a frequently used tool in developing restrictions for minimizing the movement of aldicarb residues into groundwater and preventing residues in drinking water. Examples of model use include optimizing application timing, estimating well setback distances, and identifying vulnerable soils.

Keywords

Aldicarb, 2-methyl-2-(methylthio)propionaldehyde O-(methyl-carbamoyl)oximeComputer simulationsgroundwaterPRZMaldicarb
Type
Symposium
Information
Weed Technology , Volume 6 , Issue 3 , September 1992 , pp. 683 - 687
Copyright
Copyright © 1990 by the Weed Science Society of America 

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References

Literature Cited

1. Carsel, R. F., Jones, R. L., Hansen, J. L., Lamb, R. L., and Anderson, M. P. 1988. A simulation procedure for groundwater assessments of pesticides. J. Contain. Hydrol. 2:125–138.CrossRefGoogle Scholar
2. Carsel, R. F., Mulkey, L. A., Lorber, M. N., and Baskin, L. R. 1985. The pesticide root zone model (PRZM): A procedure for evaluating pesticide leaching threats to ground water. Ecol. Modelling 30:49–69.CrossRefGoogle Scholar
3. Cohen, D. B. 1986. Ground water contamination by toxic substances: a California assessment. p. 499–529 in Garner, W. Y., Honeycutt, R. C., and Nigg, H. H., eds. Evaluation of Pesticides in Groundwater. ACS Symp. Ser. 315, American Chemical Society, Washington, DC.CrossRefGoogle Scholar
4. Dean, J. D., Huyakorn, P. S., Donigian, A. S., Voos, K. A., Schanz, R. W., Meeks, Y. J., and Carsel, R. F. 1989. Risk of Unsaturated/Saturated Transport and Transformation of Chemical Concentrations (RUSTIC). Volume 1: Theory and Code Verification, EPA/600/3-89/048a. U.S. Environ. Prot. Agency, Environ. Res. Lab., Athens, GA. 203 p.Google Scholar
5. Dean, J. D., Huyakorn, P. S., Donigian, A. S., Voos, K. A., Schanz, R. W., and Carsel, R. F. 1989. Risk of Unsaturated/Saturated Transport and Transformation of Chemical Concentrations (RUSTIC). Volume 2: User's Guide, EPA/600/3-89/048b. U.S. Environ. Prot. Agency, Environ. Res. Lab., Athens, GA. 340 p.Google Scholar
6. DeCoursey, D. G., Rojas, K. W., and Ahuja, L. R. 1989. Potentials for non-point source groundwater contamination analyzed using RZWQM. paper no. SW 892562 presented at the ASAE Winter Meeting, New Orleans, Dec. 12-15. 19 p.Google Scholar
7. Enfield, C. G., Carsel, R. F., Cohen, S. Z., Phan, T., and Walters, D. M. 1982. Approximating pollutant transport to ground water. Ground Water 20:711–722.CrossRefGoogle Scholar
8. Holden, P. W. 1986. Pesticides and Groundwater Quality, Issues and Problems in Four States. National Academy Press, Washington, DC. 124 p.Google Scholar
9. Jones, R. L. 1990. Assessing movement of pesticides in agricultural environments. p. 355–376 in Cheremisinoff, P. N., ed. Encyclopedia of Environmental Control Technology; Volume 4. Hazardous Waste Containment and Treatment. Gulf Publishing, Houston.Google Scholar
10. Jones, R. L., Black, G. W., and Estes, T. L. 1986. Comparison of computer model predictions with unsaturated zone field data for aldicarb and aldoxycarb. Environ. Toxicol. Chem. 5:1027–1037.Google Scholar
11. Jones, R. L., Hornsby, A. G., Rao, P.S.C., and Anderson, M. P. 1987. Movement and degradation of aldicarb residues in the saturated zone under citrus groves on the Florida Ridge. J. Contam. Hydrol. 1:265–285.Google Scholar
12. Jones, R. L., Rao, P.S.C., and Hornsby, A. G. 1984. Fate of aldicarb in Florida citrus soil: 2. Model evaluation. p. 959–978 in Nielson, D. M. and Curl, M., eds. Proc. Characterization and Monitoring of the Vadose (Unsaturated) Zone, Las Vegas, December 8–10, 1983. National Water Well Association, Worthington, OH.Google Scholar
13. Leonard, R. A., Knisel, W. A., and Still, D. A. 1987. GLEAMS: Groundwater Loading Effects of Agricultural Management Systems. Trans. ASAE, paper no. 86-2511. 44 p.Google Scholar
14. Nofziger, D. L. and Hornsby, A. G. 1986. A Microcomputer-based management tool for chemical movement in soil. Appl. Agric. Res. 1:50–56.Google Scholar
15. Ritter, W. F. 1990. Pesticide contamination of ground water in the United States – A review. J. Environ. Sci. Health B25(1):1–29.Google Scholar
16. Steenhuis, T. S., Pacenka, S., and Porter, K. S. 1987. MOUSE: A Management Model for Evaluating Groundwater Contamination from Diffuse Surface Sources Aided by Computer Graphics. Appl. Agric. Res. 2:277–289.Google Scholar
17. Thomspon, R. J., Young, K., Goran, W. D., and Moy, A. 1987. An Interactive Soils Information Retrieval System User's Manual. CERL TR-N-87/18. U. S. Army Construction and Engineering Research Laboratory, Champaign, IL.Google Scholar
18. Wagenet, R. J. and Hutson, J. L. 1986. Predicting the fate of nonvolatile pesticides in the unsaturated zone. J. Environ. Qual. 15:315–322.Google Scholar
19. Zaki, M. H., Moran, D., and Harris, D. 1982. Pesticides in groundwater: The aldicarb story in Suffolk County, NY. Am. J. Public Health 72:1391–1395.CrossRefGoogle ScholarPubMed