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Nicosulfuron and Primisulfuron Eradicate Rhizome Johnsongrass (Sorghum halepense) in Corn (Zea mays) in Three Years

Published online by Cambridge University Press:  12 June 2017

Michael J. Tweedy  and
George Kapusta
Michael J. Tweedy
Affiliation:
Dep. Plant Soil Sci., Southern Illinois Univ., Carbondale, IL 62901
George Kapusta
Affiliation:
Dep. Plant Soil Sci., Southern Illinois Univ., Carbondale, IL 62901
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Abstract

Field studies were conducted at Carbondale, IL from 1992 to 1994 to evaluate rhizome johnsongrass control in field corn with nicosulfuron and primisulfuron applied POST without or with EPTC applied PPL EPTC applied PPI at 4480 and 6720 g ai/ha plus dichlormid controlled johnsongrass 38 and 60% in 1992 and 29 and 41% in 1993, respectively, and 0% in 1994. EPTC did not decrease johnsongrass rhizome weight, length, or number of nodes in any year. Nicosulfuron at 35 g/ha and primisulfuron at 40 g/ha applied to 38-cm tall plants controlled 94 to 100% and 85 to 100%, respectively, from 1992 to 1994. Plots treated for three consecutive seasons with nicosulfuron or primisulfuron did not have any rhizomes. Corn yield was more than double in nicosulfuron and primisulfuron plots compared with control plots.

Keywords

Dichlormid, 2,2-dichloro-N,N-di-2-propenylacetamideEPTC, S-ethyl dipropyl carbamothioatenicosulfuron, 2-[[[[(4,6-dimethoxy-2-pyrimidinyl)amino]carbonyl]amino]sulfonyl-N,N-dimethyl-3-pyridinecarboxamideprimisulfuron, 2-[[[[[4,6-bis(difluoromethoxy)-2-pyrimidinyl]amino]carbonyl]amino]sulfonyl]benzoic acidjohnsongrass, Sorghum halepense L. Pers. # SORHAcorn, Zea mays L. ‘Pioneer 3156.’Johnsongrass lengthjohnsongrass nodesjohnsongrass rhizomesrhizome weightrhizomes
Type
Research
Information
Weed Technology , Volume 9 , Issue 4 , December 1995 , pp. 748 - 753
Copyright
Copyright © 1995 by the Weed Science Society of America 

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