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Mechanical versus herbicidal strategies for killing a hairy vetch cover crop and controlling weeds in minimum-tillage corn production

Published online by Cambridge University Press:  30 October 2009

John R. Teasdale  and
Richard C. Rosecrance
John R. Teasdale*
Affiliation:
Plant Physiologist, USDA-ARS Sustainable Agricultural Systems Laboratory, Building 001 Room 245, Beltsville, MD 20705
Richard C. Rosecrance
Affiliation:
Research Associate, USDA-ARS, Beltsville, MD and is currently Assistant Professor, Chico State University, Chico, CA 95926.
*
J.R. Teasdale (teasdale@ba.ars.usda.gov).
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Abstract

The development of production systems that provide the benefits of reduced tillage and also reduce or eliminate herbicide inputs presents a challenge to practitioners of sustainable agriculture. This research was conducted to evaluate management approaches for minimum-tillage corn production in a hairy vetch cover crop, specifically, mechanical versus herbicidal methods for pre-plant cover-crop kill and for post-emergence control of emerged weeds. Pre-plant treatments included 2,4-D [(2,4-dichlorophenoxy)acetic acid] plus residual herbicides, 2,4-D alone, flail mower, corn stalk chopper, light disk and heavy disk. The pre-plant herbicide treatments were followed by a post-emergence treatment of dicamba, whereas the pre-plant mechanical treatments were followed by post-emergence cultivation, as needed, for weed control. The mechanical treatments that kept residue on the soil surface (mower, stalk chopper and light disk) killed hairy vetch when it was flowering, but not when vegetative. The herbicide treatment with pre-plant 2,4-D alone, followed by dicamba post-emergence, controlled annual broadleaf weeds (the dominant species in these experiments) similarly to treatment with 2,4-D plus residual herbicides, suggesting that residual herbicides may be eliminated in cover-crop-based no-tillage systems. The pre-plant mechanical treatments followed by cultivation did not control annual broadleaf weeds as well as herbicide treatments, but did maintain final populations below threshold levels in two of four experiments. The stalk chopper and light disk left high levels of vetch residue on the soil surface, and reduced initial broadleaf weed populations compared with the heavy disk that incorporated residue. However, broadleaf weed populations were reduced with less efficiency by cultivation of unfilled soil following the stalk chopper or light disk (38–69%) than by cultivation of tilled soil following the heavy disk (87–95%). Thus, although maintaining surface cover-crop residue without tillage initially reduced weed emergence, it also reduced the efficiency of cultivation, leading to similar final weed populations in all mechanical-based, pre-plant treatments.

Keywords

cultivationintegrated weed managementorganic farmingsmooth pigweedsustainable agricultureweed survival
Type
Research Article
Information
American Journal of Alternative Agriculture , Volume 18 , Issue 2 , June 2003 , pp. 95 - 102
Copyright
Copyright © Cambridge University Press 2003

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References

Buhler, D.D., Doll, J.D., Proost, R.T., and Visocky, M.R.. 1994. Interrow cultivation to reduce herbicide use in corn following alfalfa without tillage. Agron. J. 86:66–72.CrossRefGoogle Scholar
Buhler, D.D., Doll, J.D., Proost, R.T., and Visocky, M.R.. 1995. Integrating mechanical weeding with reduced herbicide use in conservation tillage com production systems. Agron. J. 86:66–72.CrossRefGoogle Scholar
Clark, A.J., Decker, A.M., Meisinger, J.J., Mulford, F.R., and McIntosh, M.S.. 1995. Hairy vetch kill date effects on soil water and corn production. Agron. J. 87:579–585.CrossRefGoogle Scholar
Creamer, N.G., and Dabney, S.M.. 2002. Killing cover crops mechanically: Review of recent literature and assessment of new research results. Amer. J. Alternative Agric. 17:32–40.Google Scholar
Decker, A.M., Clark, A.J., Meisinger, J.J., Mulford, F.R., and McIntosh, M.S.. 1994. Legume cover crop contributions to no-tillage corn production. Agron. J. 86:126–135.CrossRefGoogle Scholar
Hanna, H.M., Hartzler, R.G., and Erbach, D.C.. 2000. High-speed cultivation and banding for weed management in no-till corn. Applied Eng. Agric. 16:359–365.CrossRefGoogle Scholar
Hartzler, R.G., Van Kooten, B.D., Stoltenberg, D.E., Hall, E.M., and Fawcett, R.S.. 1993. On-farm evaluation of mechanical and chemical weed management practices in corn. Weed Technol. 7:1001–1004.CrossRefGoogle Scholar
Liebman, M., and Gallandt, E.R.. 1997. Many little hammers: Ecological management of crop-weed interactions. In Jackson, L.E. (ed.). Agricultural Ecology. Physiological Ecology Series. Academic Press, San Diego, CA. p. 291–343.Google Scholar
Monler, C.L. 2001. Mechanical management of weeds. In Liebman, M., Mohler, C.L., and Staver, C.P. (eds.). Ecological Management of Agricultural Weeds. Cambridge University Press, New York. NY. p. 139–209.Google Scholar
Mt. Pleasant, J., Burt, R.F., and Frisch, J.C.. 1994. Integrating mechanical and chemical weed management in com. Weed Technol. 8:217–223.CrossRefGoogle Scholar
Mulder, T.A., and Doll, J.D.. 1993. Integrating reduced herbicide use with mechanical weeding in com. Weed Technol. 7:382–389.CrossRefGoogle Scholar
Sustainable Agriculture Network. 1998. Managing Cover Crops Profitably. 2nd ed. Handbook Series Book 3. Beltsville, MD.Google Scholar
Teasdale, J.R., and Mohler, C.L.. 2000. The quantitative relationship between weed emergence and the physical properties of mulches. Weed Sci. 48:385–392.CrossRefGoogle Scholar
Teasdale, J.R., and Shirley, D.W.. 1998. Influence of herbicide application timing on com production in a hairy vetch cover crop. J. Production Agric. 11:12–125.Google Scholar
Teasdale, J.R., Shelton, D.R., Sadeghi, A.M., and Isensee, A.R.. 2003. Influence of hairy vetch residue on atrazine and metolachlor soil solution concentrations and weed emergence. Weed Sci. in press.CrossRefGoogle Scholar
Walz, E. 1999. Final Results of the Third Biennial National Organic Farmers' Survey. Organic Farming Research Foundation, Santa Cruz, CA.Google Scholar
Williams II, M.M., Mortensen, D.A., and Doran, J.W.. 1998. Assessment of weed and crop fitness in cover crop residues for integrated weed management. Weed Sci. 46:595–603.CrossRefGoogle Scholar