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The Critical Period of Johnsongrass (Sorghum halepense) Control in Field Corn (Zea mays)

Published online by Cambridge University Press:  12 June 2017

Hani Z. Ghosheh
Affiliation:
Dep. Soil & Crop Sci., Texas Agric. Exp. Stn., College Station
David L. Holshouser*
Affiliation:
Dep. Agron., Northeast Res. & Ext. Cen., Univ. 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.

Abstract

Experiments were conducted from 1989 to 1991 to determine the critical period of johnsongrass control in field corn. Maximum weed-infested and weed-free periods of 0 to 20 wk after corn emergence were maintained by either hand weeding or nicosulfuron application. Interference duration effects on corn grain yield were not affected by johnsongrass control methods. The critical period for johnsongrass control was determined to be between 3 and 6.5 wk after corn emergence to avoid losses above 5% of yield produced by full-season weed-free corn.

Type
Weed Management
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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