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Comparison of Fall-Applied Pronamide with Spring-Applied Sethoxydim for Quackgrass (Agropyron repens) Control in Established Alfalfa (Medicago sativa)

Published online by Cambridge University Press:  12 June 2017

Gilles D. Leroux  and
Robert G. Harvey
Gilles D. Leroux
Affiliation:
Dep. Agron., Univ. Wisconsin, Madison, WI 53706
Robert G. Harvey
Affiliation:
Dep. Agron., Univ. Wisconsin, Madison, WI 53706
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Abstract

Established stands of alfalfa (Medicago sativa L.) at two field locations were treated at one date in the fall with pronamide [3,5-dichloro (N-1,1-dimethyl-2-propynil) benzamide] at 0.8 and 1.6 kg ai/ha and at two dates in the spring with sethoxydim {2-[1-(ethoxyimino)butyl]-5-[2-(ethylthio)propyl]-3-hydroxy-2-cyclohexen-1-one} at 0.3 and 0.6 kg ai/ha for the control of quackgrass [Agropyron repens (L.) Beauv. # AGRRE]. Herbicide efficacy was compared by measuring botanical and chemical composition and yield of forage. Both chemicals suppressed quackgrass in first-cutting herbage. While sethoxydim at the higher rate was equivalent to pronamide for increasing the proportion of alfalfa in forage, pronamide was superior for increasing seasonal total yield. Late postemergence applications of sethoxydim were more effective for quackgrass regrowth control than earlier spring applications. Controlling quackgrass in late spring resulted in lower crude protein (CP) content in first-cutting forage than did controlling it in fall. Alfalfa competing with untreated quackgrass had a lower CP content than where quackgrass was controlled with herbicides. All herbicide treatments reduced the neutral-detergent fiber (NDF) of the herbage. As measured by the acid-detergent fiber (ADF) concentration of alfalfa, sethoxydim slightly retarded spring growth of the legume.

Keywords

Forage qualitycrude proteinfiber contentligninAGRRE
Type
Weed Control and Herbicide Technology
Information
Weed Science , Volume 34 , Issue 3 , May 1986 , pp. 444 - 448
Copyright
Copyright © 1986 by the Weed Science Society of America 

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References

Literature Cited

1. A.O.A.C. 1970. Official methods of analysis. 11th ed. Association of Analytical Chemists. Washington, DC. Page 123.Google Scholar
2. Campbell, J. R. and Penner, D. 1981. Absorption and translocation of BAS-9052-OH. Abstr., Weed Sci. Soc. Am., No. 232.Google Scholar
3. Dubbs, A. L. 1971. Competition between grass and legume species on dryland. Agron. J. 63:359–362.CrossRefGoogle Scholar
4. Dutt, T. E. and Harvey, R. G. 1980. Pronamide phytotoxicity in ten Wisconsin soils. Weed Sci. 28:429–432.CrossRefGoogle Scholar
5. Dutt, T. E., Harvey, R. G., Fawcett, R. S., Jorgensen, N. A., Larson, H. J., and Schlough, D. A. 1979. Forage quality and animal performance as influenced by quackgrass (Agropyron repens) control in alfalfa (Medicago sativa) with pronamide. Weed Sci. 27:127–132.CrossRefGoogle Scholar
6. Fawcett, R. S., Harvey, R. G., Schoulgh, D. A., and Block, I. R. 1978. Quackgrass (Agropyron repens) control in established alfalfa (Medicago sativa) with pronamide. Weed Sci. 26:193–198.CrossRefGoogle Scholar
7. Goering, H. K. and Van Soest, P. J. 1970. Forage fiber analysis. U.S. Dep. Agric., Agric. Res. Serv. Agric. Handb. No. 379.Google Scholar
8. Harvey, R. G. and Leroux, G. D. 1979. Date and method of pronamide application for quackgrass control in alfalfa. Res. Rep. North Cent. Weed Control Conf. 36:24–27.Google Scholar
9. Kells, J. J., Meggitt, W. F., and Penner, D. 1981. Factors influencing grass control with selective postemergence herbicides. Proc. North Cent. Weed Control Conf. 36:21–22.Google Scholar
10. Leroux, G. D. and Harvey, R. G. 1980. Quackgrass (Agropyron repens) control with pronamide applied on dry fertilizer. Abstr., Weed Sci. Soc. Am., No. 35.Google Scholar
11. Leroux, G. D. and Harvey, R. G. 1980. Influence of BAS-9052 on perennial grass control and production of alfalfa. Proc. North Cent. Weed Control Conf. 33:127.Google Scholar
12. Leroux, G. D. and Harvey, R. G. 1981. Field evaluation of grass herbicides for quackgrass control in alfalfa. Proc. North Cent. Weed Control Conf. 36:40.Google Scholar
13. Triplett, G. B. Jr., Van Keuren, R. W., and Walker, J. D. 1977. Influence of 2,4-D, pronamide and simazine on dry matter production and botanical composition of an alfalfa-grass sward. Crop Sci. 17:61–66.CrossRefGoogle Scholar
14. Van Soest, P. J., Mertens, D. R., and Deinum, B. 1978. Preharvest factors influencing quality of conserved forage. J. Anim. Sci. 47:712–720.CrossRefGoogle Scholar
15. Waldo, D. R. and Jorgensen, N. A. 1981. Forages for high animal production: Nutritional factors and effects of conservation. J. Dairy Sci. 64:1207–1229.CrossRefGoogle Scholar