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Perennial Weed Populations After 14 Years of Variable Tillage and Cropping Practices

Published online by Cambridge University Press:  12 June 2017

Douglas D. Buhler ,
David E. Stoltenberg ,
Roger L. Becker  and
Jeffery L. Gunsolus
Douglas D. Buhler
Affiliation:
Nat. Soil Tilth Lab., U.S. Dep. Agric, Agric. Res. Serv., 2150 Pammel Dr., Ames, IA 50011
David E. Stoltenberg
Affiliation:
Dep. Agron., Univ. Wisconsin, Madison, WI 53706
Roger L. Becker
Affiliation:
Dep. Agron. and Plant Genet., Univ. Minnesota, St. Paul, MN 55108
Jeffery L. Gunsolus
Affiliation:
Dep. Agron. and Plant Genet., Univ. Minnesota, St. Paul, MN 55108
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Abstract

Management of perennial weeds is a major concern in reduced-tillage cropping systems. Field research was conducted at Nashua, IA, from 1977 through 1990 to evaluate the long-term impacts of tillage and cropping patterns on perennial weed populations in corn and soybean production. Continuous corn and a corn/soybean rotation were conducted utilizing moldboard plow, chisel plow, ridge tillage, and no-tillage systems. The research area was free of established perennial weed species at the initiation of the experiment in 1977. Hemp dogbane was observed by 1980, with the greatest densities in no-tillage. By 1990, continuous corn had greater hemp dogbane densities with no-tillage than other tillage system by crop rotation treatments. American germander densities were not affected by tillage systems in 1980 and 1981, but by 1990, corn/soybean rotations had greater densities in moldboard plow than other tillage systems. Field bindweed developed primarily in the corn/soybean rotations with the greatest densities occurring in no-tillage. Greater and more diverse populations of perennial weeds developed in reduced-tillage systems than in the moldboard plow system. However, practices used to control annual weeds and environmental factors interacted with tillage to regulate perennial weed populations.

Keywords

American germander, Teucrium canadense L. # TEUCAfield bindweed, Convolvulus arvensis L. # CONARhemp dogbane, Apocynum cannabinum L. # APCCAcorn, Zea mays L.soybean, Glycine max (L.) MerrConservation tillageconventional tillageno-tillageridge tillagehemp dogbaneAmerican germanderfield bindweedAPCCACONARTEUCA
Type
Weed Biology and Ecology
Information
Weed Science , Volume 42 , Issue 2 , June 1994 , pp. 205 - 209
Copyright
Copyright © 1994 by the Weed Science Society of America 

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