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Broadleaf signalgrass (Brachiaria platyphylla) interference in corn

Published online by Cambridge University Press:  20 January 2017

Jason L. Alford ,
Robert M. Hayes ,
G. Neil Rhodes Jr. ,
Lawrence E. Steckel  and
Thomas C. Mueller
Jason L. Alford
Affiliation:
Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR 72704
Robert M. Hayes
Affiliation:
Department of Plant Sciences, University of Tennessee–Jackson, Jackson, TN 38305
G. Neil Rhodes Jr.
Affiliation:
Department of Plant Sciences, University of Tennessee–Knoxville, Knoxville, TN 37996-4561
Lawrence E. Steckel
Affiliation:
Department of Plant Sciences, University of Tennessee–Jackson, Jackson, TN 38305
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Abstract

Field research was conducted in Tennessee at two locations over 3 yr under no-tillage conditions to examine the interaction of broadleaf signalgrass and corn yield. Broadleaf signalgrass was killed at various time intervals during the growing season by applying postemergent glyphosate. Corn injury was avoided by the use of a glyphosate-tolerant variety. Yield reductions because of broadleaf signalgrass interference occurred with weed densities > 150 plants m−2 and when the corn and weeds emerged simultaneously. Corn had the ability to withstand broadleaf signalgrass presence up to 28 d after planting with no yield loss at all locations.

Keywords

Glyphosatebroadleaf signalgrass, Brachiaria platyphylla (Griseb.) Nash BRAPPcorn, Zea maysInterferencecompetitionyield losslogistic model

Information

Type
Weed Biology and Ecology
Information
Weed Science , Volume 53 , Issue 1 , February 2005 , pp. 97 - 100
Copyright
Copyright © Weed Science Society of America 

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References

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