Broadleaf signalgrass (Brachiaria platyphylla) interference in corn

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 w...

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Bibliographic Details
Published in:Weed science 2005-01, Vol.53 (1), p.97-100
Main Authors: Alford, Jason L., Hayes, Robert M., Rhodes, G. Neil, Steckel, Lawrence E., Mueller, Thomas C.
Format: Article
Language:English
Subjects:
competition
Corn
crop-weed competition
Germination
glyphosate
grain yield
grass weeds
Growing seasons
Herbicides
Infestation
Interference
logistic model
No tillage
plant density
Planting
Plants
Seeds
Urochloa platyphylla
varieties
WEED BIOLOGY AND ECOLOGY
Weeds
yield loss
Zea mays
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Summary: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. Nomenclature: Glyphosate; broadleaf signalgrass, Brachiaria platyphylla (Griseb.) Nash BRAPP; corn, Zea mays.
ISSN:0043-1745
1550-2759
DOI:10.1614/WS-04-092R