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Effects of Tillage Systems and Weed Management on Weed Populations in Grain Sorghum (Sorghum bicolor)

Published online by Cambridge University Press:  12 June 2017

William K. Vencill  and
Philip A. Banks
William K. Vencill
Affiliation:
Crop and Soil Sci. Dep., Univ. Georgia, Athens, GA 30602
Philip A. Banks
Affiliation:
Crop and Soil Sci. Dep., Univ. Georgia, Athens, GA 30602
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Abstract

Field research was conducted from 1987 to 1991 to evaluate the influence of four weed management systems on weed population and species dynamics in conventional-tillage and no-tillage grain sorghum production. These weed management systems included zero, low, medium, and high input systems. The weed seedbank increased faster in zero and low input weed management systems than in the high input weed management systems because of differences in weed control. Tillage influenced weed seed densities as well. Common ragweed, common lambsquarters, horseweed, and sicklepod seed densities often were greater in no-tillage than conventional-tillage plots. Common cocklebur and large crabgrass seed densities were usually greater in conventional-tillage than no-tillage plots. Smooth pigweed seed densities were not affected by tillage. Increasing weed management inputs diminished differences between tillage systems. Smooth pigweed dominated the weed populations after 4 yr in both tillage systems even in high input systems.

Keywords

Common lambsquarters, Chenopodium album L. # CHEALcommon ragweed, Ambrosia artemisiifolia L. # AMBELcommon cocklebur, Xanthium strumarium L. # XANSTlarge crabgrass, Digitaria sanguinalis (L.) Scop. # DIGSAsmooth pigweed, Amaranthus hybridus L. # AMACHgrain sorghum, Sorghum bicolor (L.) Moench. ‘Pioneer 8333.’Conservation-tillageweed seedbankAMBELCASOBCHEALDIGSAERICAXANST
Type
Weed Biology and Ecology
Information
Weed Science , Volume 42 , Issue 4 , December 1994 , pp. 541 - 547
Copyright
Copyright © 1994 by the Weed Science Society of America 

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References

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