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Influence of Density on Johnsongrass (Sorghum halepense) Interference in Field Corn (Zea mays)

Published online by Cambridge University Press:  12 June 2017

Hani Z. Ghosheh ,
David L. Holshouser  and
James M. Chandler
Hani Z. Ghosheh
Affiliation:
Dep. Soil & Crop Sci., Texas Agric. Exp. Stn., College Station
David L. Holshouser*
Affiliation:
Dep. Agron., Northeast Res. & Ext. Cen., University of Nebraska, Concord, NE 68728
James M. Chandler
Affiliation:
Dep. Soil & Crop Sci., Texas Agric. Exp. Stn., College Station, TX 77843
*
* Corresponding author, nerc015@unlvm.unl.edu.
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Abstract

Experiments were conducted from 1990 to 1994 to investigate the density-dependent effects of rhizome and seedling johnsongrass on the magnitude of full-season interference in field corn. Corn grain yield was decreased as rhizome johnsongrass density increased. A maximum density of 3 rhizome johnsongrass plants 9.8 m−1 of row was considered critical to avoid yield losses above 5% of full-season weed-free corn. Interference of johnsongrass plants originating from seed and growing at densities up to 128 plants 9.8 m−1 of row did not affect grain yield. Seedling johnsongrass plants growing at a constant density of 9.8 plants m−1 of row did not affect yield from corn planted at five densities.

Keywords

johnsongrass, Sorghum halepense (L.) Pers. ♯ SORHAcorn, Zea mays L. ‘DPL G4673B’ and ‘DPL G6664.’Competitioncritical minimum density

Information

Type
Weed Biology and Ecology
Information
Weed Science , Volume 44 , Issue 4 , December 1996 , pp. 879 - 883
Copyright
Copyright © 1996 by the Weed Science Society of America 

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Footnotes

Current address of senior author is Dep. Plant Production. Jordan University of Sci. and Technol., P.O. Box 3030, Irbid, Jordan

References

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