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Effect of Preplant Tillage, Post-Plant Cultivation, and Herbicides on Weed Density in Corn (Zea mays)

Published online by Cambridge University Press:  12 June 2017

Robert G. Wilson
Robert G. Wilson*
Affiliation:
Dep. Agron., Univ. Nebraska, Scottsbluff, NE 69361
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Abstract

A four-year experiment was conducted near Scottsbluff, NE to evaluate the effect of different methods of preplant tillage, post-plant cultivation, and herbicides on weed density and grain yield. Ridge-till enhanced the development of kochia and reduced the density of wild proso millet and common lambsquarters. Tandem disking increased longspine sandbur and redroot pigweed density whereas moldboard plowing increased common sunflower density. Cultivation reduced weed density 86% but weeds that remained after cultivation reduced corn grain yield by 40% as compared with a hand-weeded control. Weed control treatments that integrated cultivation and herbicides controlled a broader spectrum of weed species than cultivation or herbicide treatments alone.

Keywords

Common lambsquarters, Chenopodium album L. # CHEALcommon sunflower, Helianthus annuus L. # HELANkochia, Kochia scoparia (L.) Schrad. # KCHSClongspine sandbur, Cenchrus longispinus (Hack.) Fern. # CCHPA: redroot pigweed, Amaranthus retroflexus L. # AM AREwild proso millet, Panicum miliaceum L. # PANMI, corn, Zea mays L. ‘Pioneer 3790’CyanazinedicambanicosulfuronpendimethalinAmaranthus retroflexusCenchrus longispinusChenopodium albumHelianthus annuusKochia scopariaPanicum miliaceumAMARECCHPACHEALHELANKCHSCPANMI
Type
Research
Information
Weed Technology , Volume 7 , Issue 3 , September 1993 , pp. 728 - 734
Copyright
Copyright © 1993 by the Weed Science Society of America 

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References

Literature Cited

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