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Long-Term Control of Perennial Broadleaf Weeds and Triazine-Resistant Common Lambsquarters (Chenopodium album) in No-Till Corn (Zea mays)

Published online by Cambridge University Press:  12 June 2017

Scott Glenn ,
William H. Phillips II  and
Pablo Kalnay
Scott Glenn
Affiliation:
Agronomy Department, University of Maryland, College Park. MD 20742
William H. Phillips II
Affiliation:
Agronomy Department, University of Maryland, College Park. MD 20742
Pablo Kalnay
Affiliation:
Agronomy Department, University of Maryland, College Park. MD 20742
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Abstract

Control and regrowth of hemp dogbane, wild blackberry, and triazine-resistant common lambsquarters (TR-CHEAL) were studied in no-till corn from 1992 to 1994. Hemp dogbane, wild blackberry, and TR-CHEAL population increased 10, 123, and 177%, respectively, between 1992 and 1994 in plots treated with PRE applications of paraquat, atrazine, and metolachlor (weedy checks). POST applications of tank mixtures of 35 g ai/ha nicosulfuron or 20 g/ha primisulfuron with 280 g/ha 2,4-D or 140 g/ha dicamba, and 560 g/ha dicamba applied alone controlled hemp dogbane, wild blackberry, and TR-CHEAL 67 to 98%. These treatments reduced the population or prevented expansion of these weeds the year following treatment. In 1992, corn yield response to weed control was inconsistent. In 1993 and 1994, all plots treated with POST herbicides yielded higher than the weedy check. Corn yield of plots treated with combinations of nicosulfuron or primisulfuron with 2,4-D or dicamba and 560 g/ha dicamba applied alone were 102 to 149% and 124 to 153% higher than the weedy check in 1993 and 1994, respectively.

Keywords

Atrazine, 6-chloro-N-ethyl-N'-(1-methylethyl)-1,3,5-triazine-2, 4-diaminedicamba, 3,6-dichloro-2-methoxybenzoic acidmetolachlor, [2-chloro-N-(2-ethyl-6-methylphenyl)-N-(2-methoxy-1-methylethyl) acetamide]nicosulfuron, 2-[[[[(4,6-dimethoxy-2-pyrimidinyl)amino]-carbonyl] amino]sulfo nyl]-N,N-dimethyl-3-pyridinecarboxamideparaquat, 1,1'-dimethyl-4,4'-bipyridiniumionprimisulfuron, methyl 2-[[[[[4,6-bis (difluoromethoxy)-2-pyrimidinyl] amino]carbonyl]amino]sulfonyl]benzoic acid2,4-D, (2,4-dichlorophenoxy) acetic acidcommon lambsquarters, Chenopodium album L. # CHEALhemp dogbane, Apocynum cannabinum L. # APCCAwild blackberry, Rubus allegheniensis Porter # RUBALcorn, Zea mays L.No-tillperennial weed controlregrowthatrazinedicambanicosulfuronprimisulfuron2,4-DAPCCACHEALRUBALCT, conventional tillageNT, no-tillagePost, postemergencePRE, preemergenceTR-CHEAL, triazine-resistant common lambsquartersWAT, weeks after treatment
Type
Research
Information
Weed Technology , Volume 11 , Issue 3 , September 1997 , pp. 436 - 443
Copyright
Copyright © 1997 by the Weed Science Society of America 

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References

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