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Effect of Herbicide Rotations on Enhanced Herbicide Biodegradation and Wild-Proso Millet (Panicum miliaceum) Control

Published online by Cambridge University Press:  12 June 2017

R. Gordon Harvey*
Affiliation:
Dep. Agron., Univ. Wisconsin, Madison, WI 53706

Abstract

A 6-yr field study was conducted to determine the effect of herbicide rotations on enhanced biodegradation of EPTC applied with and without dietholate, and on long-term control of wild-proso millet in sweet corn. Alachlor plus pendimethalin plus cyanazine or cycloate plus cyanazine for 1 yr following previous EPTC plus cyanazine applications reduced enhanced EPTC biodegradation in 3 of 4 and 2 of 3 yr, respectively. Enhanced biodegradation of EPTC applied with dietholate was reduced in 1 of 2 yr when EPTC plus dietholate plus cyanazine treatments were followed for 1 yr by alachlor plus cyanazine, pendimethalin plus cyanazine, or cycloate plus cyanazine, but was not reduced in 2 of 3 yr when EPTC plus dietholate plus cyanazine treatments were followed for 1 yr by alachlor plus pendimethalin plus cyanazine. Dietholate biodegradation was enhanced in soils treated 1, 2, or 3 yr previously with one application of EPTC plus dietholate plus cyanazine. After 3 yr of repeated use, cycloate biodegradation was also enhanced. Continuous use of EPTC plus cyanazine and EPTC plus dietholate plus cyanazine over 6 yr provided an average of only 46 and 64% wild-proso millet control, respectively. When applied once every second, third, or fourth year in rotation with alachlor plus pendimethalin plus cyanazine or cycloate plus cyanazine, EPTC plus cyanazine provided 83, 86, and 95% wild-proso millet control, respectively. EPTC plus dietholate plus cyanazine applied every second, third, or fourth year in rotation with cycloate plus cyanazine, alachlor plus cyanazine, pendimethalin plus cyanazine, or alachlor plus by pendimethalin plus cyanazine provided 88, 91, and 95% wild-proso millet control, respectively.

Type
Weed Control and Herbicide Technology
Copyright
Copyright © 1992 by the Weed Science Society of America 

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References

Literature Cited

1. Doersch, R. E., Fisher, H. L., and Harvey, R. G. 1987. Wild proso millet control in field crops. North Cent. Regional Ext. Publ. No. 265, 4 p.Google Scholar
2. Harvey, R. G. 1979. Serious new weed threat: wild proso millet. Crops Soils Mag. 31:1013.Google Scholar
3. Harvey, R. G. 1987. Herbicide dissipation from soils with different herbicide use histories. Weed Sci. 35:583589.Google Scholar
4. Harvey, R. G. 1990. Systems allowing continued use of carbamothioate herbicides despite enhanced biodegradation. Pages 214221 in Racke, K. D. and Coats, J. R., eds. Enhanced Biodegradation of Pesticides in the Environment. ACS Symp. Ser. 426, Am. Chem. Soc., Washington, DC.Google Scholar
5. Harvey, R. G. 1990. Biodegradation of butylate, EPTC, and extenders in previously treated soils. Weed Sci. 38:237342.Google Scholar
6. Harvey, R. G. and McNevin, G. R. 1990. Combining cultural practices and herbicides to control wild-proso millet (Panicum miliaceum). Weed Technol. 4:433439.Google Scholar
7. Harvey, R. G., Dekker, J. H., Fawcett, R. S., Roeth, F. W., and Wilson, R. G. 1987. Enhanced biodegradation of herbicides in soil and effects on weed control. Weed Technol. 1:341349.Google Scholar
8. Harvey, R. G., McNevin, G. R., Albright, J. W., and Kozak, M. E. 1986. Wild-proso millet (Panicum miliaceum) control with thiocarbamate herbicides on previously treated soils. Weed Sci. 34:773780.Google Scholar
9. Misullis, B., Nohynek, G. J., and Periro, F. 1982. R-33865: A novel concept for extended weed control by thiolcarbamate herbicides. Proc. 1982 Br. Crop Prot. Conf. – Weeds: 205210.Google Scholar
10. Obrigawitch, T., Roeth, F. W., Martin, A. R., and Wilson, R. G. 1982. Addition of R-33865 to EPTC for extended herbicide activity. Weed Sci. 30:417422.Google Scholar
11. Rahman, A. and James, T. K. 1983. Decreased activity of EPTC + R-25788 following repeated use in some New Zealand soils. Weed Sci. 31:783789.Google Scholar
12. Rudyanski, W. J., Fawcett, R. S., and McAllister, R. S. 1987. Effect of prior pesticide use on thiocarbamate herbicide persistence and giant foxtail (Setaria faberi) control. Weed Sci. 35:6874.Google Scholar
13. Wilson, R. G. and Rodebush, J. E. 1987. Degradation of dichlormid and dietholate in soils with prior EPTC, butylate, dichlormid, and dietholate exposure. Weed Sci. 35:289294.Google Scholar