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Population Dynamics and Control of Annual Weeds in Corn (Zea mays) as Influenced by Tillage Systems

Published online by Cambridge University Press:  12 June 2017

Douglas D. Buhler
Douglas D. Buhler*
Affiliation:
U.S. Dep. Agric., Agric. Res. Serv., Plant Sci. Res. Unit, Dep. Agron. and Plant Genet., Univ. Minnesota, St. Paul, MN 55108
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Abstract

Field research was conducted at Hancock, WI, from 1985 through 1987 to evaluate effects of conventional tillage, chisel plow, ridge tillage, and no-tillage systems on population dynamics and control of annual weed species in corn grown continuously on a loamy sand soil without irrigation. In all years of the study, green foxtail densities were greater in chisel plow and no-tillage than in the conventional tillage system, while ridge tillage had densities lower than all other tillage systems. Common lambsquarters density in the chisel plow system reached nearly 500 plants m−2 compared to less than 75 plants m−2 in the other tillage systems when averaged over years. Average redroot pigweed densities in the no-tillage and chisel plow systems were 307 and 245 plants m−2 compared to less than 25 plants m−2 in the conventional and ridge tillage systems. Horseweed was observed only in no-tillage and ridge tillage plots. Green foxtail and redroot pigweed were more difficult to control in chisel plow and no-tillage than in the conventional and ridge tillage systems with several herbicide treatments. Corn yields were not affected by tillage systems under weed-free conditions. Corn yield differences among tillage systems when the same herbicide treatment was applied appeared to be due to differences in weed control.

Keywords

Common lambsquarters, Chenopodium album L. #3 CHEALgreen foxtail, Setaria viridis (L.) Beauv. # SETVIhorseweed, Conyza canadensis (L.) Cronq. # ERICAredroot pigweed, Amaranthus retroflexus L. # AMAREcorn, Zea mays L.‘Hughes 5302′Alachloratrazineconservation tillagecyanazinemetolachlorno-tillageAMARECHEALERICASETVI
Type
Weed Control and Herbicide Technology
Information
Weed Science , Volume 40 , Issue 2 , June 1992 , pp. 241 - 248
Copyright
Copyright © 1992 by the Weed Science Society of America 

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