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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 ,
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., Univ. of Nebraska, Concord, NE 68728
James M. Chandler
Affiliation:
Dep. Soil & Crop Sci., Texas Agric. Exp. Stn., College Station, TX 77843
*
*Corresponding author, [email protected].
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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.

Keywords

nicosulfuron, {2-[[[[(4,6-dimethoxy-2-pyrimidinyl)amino]carbonyl]amino]-sulfonyl]-N, N-dimethyl-3-pyridinecarboxamide}johnsongrass, [Sorghum halepense (L.) Pers.] SORHAcorn, (Zea mays L.) ‘DPL G4673B.’Maximum weed-infested periodminimum weed-free periodcompetitioninterference
Type
Weed Management
Information
Weed Science , Volume 44 , Issue 4 , December 1996 , pp. 944 - 947
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

Literature Cited

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