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Reduced Rates of Postemergence Herbicides for Weed Control in Sweet Corn (Zea mays)

Published online by Cambridge University Press:  12 June 2017

John O'Sullivan  and
William J. Bouw
John O'Sullivan
Affiliation:
Hortic. Exp. Stn., Simcoe, Ontario, Canada N3Y 4N5
William J. Bouw
Affiliation:
Hortic. Exp. Stn., Simcoe, Ontario, Canada N3Y 4N5
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Abstract

The efficacy of reduced rates of POST herbicides for weed control in sweet corn was evaluated over a three-year period in field studies conducted at the Horticultural Experiment Station, Simcoe, Ontario. POST applications of metolachlor/cyanazine, cyanazine/atrazine and metolachlor/atrazine at 1/2X and 1/4X of labelled rates controlled broadleaf weeds comparable to that of standard labelled rates. Control exceeded 94% each year. Annual grass control was reduced with below-label rates, especially for cyanazine/atrazine and metolachlor/atrazine. A 1/2X application of nicosulfuron/rimsulfuron, following the 1/4X rate of cyanazine/atrazine, significantly improved grass control, compared to cyanazine/atrazine applied alone. Below-label rates did not result in decreased sweet corn yields.

Keywords

Atrazine, 6-chloro-N-ethyl-N′-(1-methylethyl)-1,3,5-triazine-2,4-diaminecyanazine, 2-[[4-chloro-6-(ethylamino)-1,3,5-triazin-2-yl]amino]-2-methylpropanamidemetolachlor, 2-chloro-N-(2-ethyl-6-methylphenyl)-N-(2-methoxy-1-methylethyl)acetamidenicosulfuron, 2-[[[[(4,6-dimethoxy-2-pyrimidinyl)amino]carbonyl]amino]sulfonyl]-N,N-dimethyl-3-pyridinecarboxamiderimsulfuron, N-[[(4,6-dimethoxy-2-pyrimidinyl)amino]carbonyl]-3-(ethylsulfonyl)-2-pyridinesulfonamidelarge crabgrass, Digitaria sanguinalis (L.) Scop. # DIGSAsweet corn, Zea mays L.Cyanazine/atrazinemetolachlor/atrazinemetolachlor/cyanazinenicosulfuron/rimsulfuronAMARECAPBPCHEALDIGSAECHCGPOLCOPOLPEPOROL
Type
Research
Information
Weed Technology , Volume 7 , Issue 4 , December 1993 , pp. 995 - 1000
Copyright
Copyright © 1994 by the Weed Science Society of America 

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References

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