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Off-Site Movement of Hexazinone in Stormflow and Baseflow from Forest Watersheds

Published online by Cambridge University Press:  12 June 2017

Daniel G. Neary ,
Parshall B. Bush  and
James E. Douglass
Daniel G. Neary
Affiliation:
Southeast. For. Exp. Stn., For. Serv., U.S. Dep. Agric., Coweeta Hydrologic Lab., Otto, NC 28763
Parshall B. Bush
Affiliation:
Ext. Poult. Sci. Dep. Univ. of Georgia, Athens, GA 30601
James E. Douglass
Affiliation:
Southeast. For. Exp. Stn., For. Serv., U.S. Dep. Agric., Coweeta Hydrologic Lab., Otto, NC 28763
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Abstract

Four forest watersheds (1 ha each) in the upper piedmont of Georgia were treated with hexazinone [3-cyclohexyl-6-(dimethylamino)-1-methyl-1,3,5-triazine-2,4(1H, 3H)-dione] pellets3 at a rate of 1.68 kg ai/ha. From the end of April, 1979, until May, 1980, 26 storms were monitored to determine movement of hexazinone and two of its metabolites [A: 3-(4-hydroxycyclohexyl)-6-(dimethylamino)-1-methyl-1,3,5-triazine-2,4(1H, 3H)-dione, and B: 3-cyclohexyl-6-(methylamino)-1-methyl-1,3,5-triazine-2,4(1H, 3H)-dione] in runoff water. Residues in runoff peaked in the first storm after application (mean concentration of 442 ± 53 ppbw), and declined with subsequent storms in a power curve function: Conc. (ppbw) = 405 × rate × (1 + 0.44 × days)-1.1. Loss of hexazinone in storm runoff averaged 0.53% of the applied herbicide, with Storms 1 and 17 accounting for 59.3% of the chemical exported. Storm 1 had high residue concentrations and low runoff volume, while Storm 17 contained only low residue levels but a very large stormflow. Hexazinone was the predominant compound in the runoff of all 26 storms. Metabolites A and B occurred in runoff in low-to-trace concentrations (<23 ppbw) for up to 7 months after application. Subsurface movement of hexazinone appeared in streamflow 3 to 4 months after application and produced an additional loss of 0.05%. A second-order perennial stream below the treated watersheds periodically contained hexazinone residues of <44 ppbw.

Keywords

Residueherbicideecosystem modelrunoff
Type
Research Article
Information
Weed Science , Volume 31 , Issue 4 , July 1983 , pp. 543 - 551
Copyright
Copyright © 1983 Weed Science Society of America 

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References

Literature Cited

1. Bailey, G. W., Swank, R. R. Jr., and Nicholson, H. P. 1974. Predicting pesticide runoff from agricultural land: A conceptual model. J. Environ. Qual. 3:95–102.Google Scholar
2. Barber, T. Jr. 1979. Georgia tests a new forest herbicide. Proc. South. Weed Sci. Soc. 32:198–206.Google Scholar
3. Brakensiek, D. L., Osborn, H. B., and Rawls, W. J. (Coordinators). 1979. Field Manual for Research in Agricultural Hydrology. U.S. Dep. Agric. Agric. Handb. 224. 550.Google Scholar
4. Bruce, R. R. Jr., Harper, L. A., Leonard, R. A., Snyder, W. M., and Thomas, A. W. 1975. A model for runoff of pesticides from upland watersheds. J. Environ. Qual. 4:541–548.Google Scholar
5. Crawford, N. M. and Donigan, A. S. 1973. Pesticide transport and runoff from agricultural lands. Environ. Prot. Technol. Ser. EPA-660/2–74–013. 211.Google Scholar
6. Davis, E. A., Ingebo, P. A., and Page, P. C. 1969. Effect of a watershed treatment with picloram on water quality. U.S. For. Serv. Rocky Mount. For. Range Exp. Stn. Res. Notes RM-100. 4.Google Scholar
7. Donigan, A. S., Beyerlein, D. C., Davis, H. H. Jr., and Crawford, N. H. 1977. Agricultural runoff management (ARM) model version II: Refinement and testing. Environ. Prot. Technol. Ser. EPA-600-3-77-098. 293.Google Scholar
8. Donigan, A. S. and Crawford, N. H. 1976. Modeling pesticides and nutrients on agricultural lands. Environ. Prot. Technol. Ser. EPA-600/2-76-043. 317.Google Scholar
9. Douglass, J. E., Cochrane, D. R., Bailey, G. W., Teasley, J. I., and Hill, D. W. 1969. Low herbicide concentration found in stormflow after a grass cover is killed. U.S. For. Serv. Southeast. For. Exp. Stn. Res. Notes SE-94. 15.Google Scholar
10. Fowler, M. C. 1977. Laboratory trials of the new triazine herbicide (DPX 3674) on various aquatic species of macrophytes and algae. Weed Res. 17:191–195.CrossRefGoogle Scholar
11. Gonzalez, F. E. 1980. The development of Velpar$rg “Gridball” Brushkiller – hexazinone pellets – for forestry. Proc. South. Weed Sci. Soc. 33:132–138.Google Scholar
12. Haith, D. A. 1980. A mathematical model for estimating pesticide losses in runoff. J. Environ. Qual. 9:428–433.Google Scholar
13. Hamilton, R. A. 1979. A chemical method to reduce hardwood competition on pine stands. Proc. South. Weed Sci. Soc. 32:207–211.Google Scholar
14. Hershfield, D. W. 1961. Rainfall frequency atlas of the United States for durations from 30 minutes to 24 hours and return periods from 1 to 100 years. Weather Bureau, U.S. Dep. Commerce. 115.Google Scholar
15. Hibbert, A. R. and Cunningham, G. B. 1966. Streamflow data processing opportunities and application. Pages 725–736 in Sopper, W. E. and Lull, H. W., ed. Int. Symp. For. Hydrol., Penn. State Univ. Aug. 29-Sept. 10, 1965.Google Scholar
16. Holt, R. H. 1981. Determination of hexazinone and metabolite residues using nitrogen selective gas chromatography. J. Agric. Food Chem. 29:165–172.Google Scholar
17. Klingman, G. C. 1975. Pesticide development. Pages 15–25 in Brynes, W. R. and Holt, H. A., ed. Herbicides in Forestry. Proc. 1975 John S. Wright For. Conf., Dep. For. Nat. Res. Purdue Univ., West Lafayette, IN.Google Scholar
18. Knisel, W. C., (ed.) 1980. CREAMS: A field scale model for chemicals, runoff, and erosion from agricultural management systems. U.S. Dep. Agric. Conserv. Res. Rep. No. 26. 640.Google Scholar
19. Mayack, D. T., Bush, P. B., Neary, D. G., and Douglass, J. E. 1982. Impact of hexazinone on invertebrates after application to forested watersheds. Arch. Environ. Contam. Toxicol. (In press.) Google Scholar
20. Michael, J. L. 1980. Formulation, rate, and season of application effects of hexazinone (Velpar) Gridball on oak top kill. Proc. South. Weed Sci. Soc. 33:110–113.Google Scholar
21. Miller, J. H. and Bace, A. C. 1980. Streamwater contamination after aerial application of pelletized herbicide. U.S. For. Serv. South. For. Exp. Stn. Res. Notes SO-255. 4.Google Scholar
22. Neary, D. G., Bush, P. B., and Douglass, J. E. 1981. 2-, 4-, and 14-month efficacy of hexazinone for site preparation. Proc. South. Weed Sci. Soc. 34:181–191.Google Scholar
23. Neary, D. G., Douglass, J. E., and Fox, W. 1979. Low picloram concentrations in streamflow resulting from forest application of Tordon 10K. Proc. South. Weed Sci. Soc. 32:182–197.Google Scholar
24. Newton, M. A. and Norgren, J. A. 1977. Silvicultural chemicals and protection of water quality. Environ. Prot. Technol. Ser. EPA-910/9-77-036. 224.Google Scholar
25. Norris, L. A. 1981. Behavior of herbicides in the forest environment and risk assessment. Pages 192–215 in Holt, H. A. and Fischer, B. C., ed. Weed Control in Forest Management. Proc. 1981 John S. Wright For. Conf., Dep. For. Nat. Res. Purdue Univ., West Lafayette, IN.Google Scholar
26. Norris, L. A. and Montgomery, M. L. 1975. Dicamba residues in streams after forest spraying. Bull. Environ. Contam. Toxicol. 13:1–8.CrossRefGoogle ScholarPubMed
27. Norris, L. A. and Moore, D. G. 1971. The entry and fates of forest chemicals in streams. Pages 138–158 in Krygier, J. T. and Hale, J. D., ed. Forest Land Uses and Stream Environment. Oregon State Univ. Press, Corvallis, OR.Google Scholar
28. Ponce, S. L. 1980. Water quality monitoring programs. U.S. For. Serv. Watershed Systems Developing Group Tech. Pap. WSDG-TP-00002, Fort Collins, CO. 66.Google Scholar
29. Wauchope, R. D. 1978. The pesticide content of surface water draining from agricultural fields – a review. Soil Sci. Soc. Am. Proc. 7:459–472.Google Scholar
30. Wauchope, R. D. and Leonard, R. A. 1980. Maximum pesticide concentrations in agricultural runoff: a semiempirical prediction formula. J. Environ. Qual. 9:665–672.Google Scholar