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Weed Management of Amaranthus spp. in Corn (Zea mays)

Published online by Cambridge University Press:  12 June 2017

S. Vizantinopoulos  and
N. Katranis
S. Vizantinopoulos
Affiliation:
National Agricultural Research Foundation, Directorate of International Relations, Documentation and Informatics, 19 Egialias Street, 151 25 Maroussi-Greece
N. Katranis
Affiliation:
National Agricultural Research Foundation, Research Experimental Station, 351 00 Vardates, Greece
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Abstract

Field experiments were conducted from 1987 to 1990 to investigate the combination of cultural and chemical methods for control of Amaranthus spp. in corn. The tolerance of corn hybrids to herbicides or herbicide combinations was dependent on application rate. The early season threshold level for a mixed population of Amaranthus spp. occurred 3.5 wk after emergence. Density of Amaranthus spp. from 155 to 495 plants/m2 caused corn yield reduction of 50%. A quadratic model was derived relating percentage of yield reduction vs. duration of weed competition. The results emphasize the importance of using herbicides, cultural practices, and competition thresholds for an integrated weed control approach of Amaranthus spp. in corn.

Keywords

Tumble pigweed, Amaranthus albus # AMAALlivid amaranth, Amaranthus lividus L. # AMALIredroot pigweed, Amaranthus retroflexus L. # AMAREcorn, Zea mays L.hybrids ‘Alexandros,’‘Ares,’‘Athina.’AMAALAMALIAMAREPOST, postemergencePRE, preemergenceWAE, weeks after emergence
Type
Research
Information
Weed Technology , Volume 12 , Issue 1 , March 1998 , pp. 145 - 150
Copyright
Copyright © 1997 by the Weed Science Society of America 

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References

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