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Postemergence Broadleaf Weed Control in Corn (Zea mays) with CGA-152005

Published online by Cambridge University Press:  12 June 2017

Michelle R. Obermeier  and
George Kapusta
Michelle R. Obermeier
Affiliation:
Dep. Plant and Soil Sci., Southern Illinois Univ., Carbondale, IL 62901
George Kapusta
Affiliation:
Dep. Plant and Soil Sci., Southern Illinois Univ., Carbondale, IL 62901
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Abstract

Field studies were conducted in 1993 and 1994 to evaluate broadleaf weed control in corn with the sulfonylurea herbicide CGA-152005, CGA-152005 was applied at 10 to 50 g ai/ha alone and in combination with 2,4-D, dicamba, or atrazine. No corn injury was observed either year. Metolachlor plus CGA-152005 controlled redroot pigweed, velvetleaf, and common cocklebur 95% or more in 1993 and 1994. Common lambsquarters and ivyleaf morningglory control was dependent on CGA-152005 rate, weed size at application, and growing conditions. In 1994, control of velvetleaf and ivyleaf morningglory with CGA-152005 at 10 or 20 g/ha was less when applied as a tank-mix with atrazine and dicamba compared with when it was applied alone, probably due to antagonism caused by the companion herbicide. Generally, corn yield was related to weed control.

Keywords

Atrazine, 6-chloro-N-ethyl-N'(1-methylethyl)-1,3,5-triazine-2,4-diamineCGA-152005, 1-(4-methoxy-6-methyl-triazin-2-yl)-3-[2-(3,3,3-trifluoropropyl)-phenylsulfonyl]-ureadicamba, 3,6-dichloro-2-methoxybenzoic acidmetolachlor, 2-chloro-N-(2-ethyl-6-methylphenyl)-N-(2-methoxy-1-methylethyl)acetamide2,4-D, (2,4-dichlorophenoxy)acetic acidcommon cocklebur, Xanthium strumarium L. # XANSTcommon lambsquarters, Chenopodium album L. # CHEALivyleaf morningglory, Ipomea hederacea L. (Jacq.) # IPOHEredroot pigweed, Amaranthus retroflexus L. # AMAREvelvetleaf, Abutilon theophrasti Medik. # ABUTHcorn, Zea mays L. ‘Pioneer 3394.’Postemergence herbicidesAbutilon theophrastiAmaranthus retroflexusChenopodium albumIpomea hederaceaXanthium strumariumABUTHAMARECHEALIPOHEXANST
Type
Research
Information
Weed Technology , Volume 10 , Issue 4 , December 1996 , pp. 689 - 698
Copyright
Copyright © 1996 by the Weed Science Society of America 

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