Hostname: page-component-586b7cd67f-gb8f7 Total loading time: 0 Render date: 2024-11-27T20:07:58.820Z Has data issue: false hasContentIssue false
  • English
  • Français

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
Get access Rights & Permissions [Opens in a new window]

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 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Literature Cited

1. Akobundu, I. O., Sweet, R. D., Duke, W. B., and Minotti, P. L. 1975. Weed response to atrazine and alachlor combinations at low rates. Weed Sci. 23:67–70.CrossRefGoogle Scholar
2. Baldwin, F. L. and Oliver, L. R. 1985. A reduced rate intensive management soybean weed control program. Proc. South. Weed Sci. Soc. 38:487.Google Scholar
3. Defelice, M. S., Brown, W. B., Aldrich, R. J., Sims, B. D., Judy, D. T., and Guethle, D. R. 1989. Weed control in soybeans (Glycine max) with reduced rates of postemergence herbicides. Weed Sci. 37:365–374.CrossRefGoogle Scholar
4. Devlin, D. L., Long, J. H., and Maddux, L. D. 1991. Using reduced rates of postemergence herbicides in soybeans (Glycine max). Weed Technol. 5:834–840.CrossRefGoogle Scholar
5. Feldick, T. and Kapusta, G. 1986. Influence of weed size on the efficacy of reduced rates of postemergence-applied acifluorfen, bentazon, imazaquin and DPX-F6025 in soybeans. Proc. North Cent. Weed Control Conf. 41:47.Google Scholar
6. Harvey, R. G., Nelson, R. K., and Halstead, S. J. 1986. Timing postemergence herbicides for soybean weed control. Proc. North Cent. Weed Control Conf. 41:44.Google Scholar
7. Hopkins, J. A., Oliver, L. R., and Baldwin, F. L. 1986. Intensive soybean herbicide management programs. Proc. South. Weed Sci. Soc. 39:94.Google Scholar
8. Kuksk, P. 1989. Experience with reduced herbicide doses in Denmark and the development of the concept of factor-adjusted doses. Proc. Brighton Crop Prot. Conf.: Weeds 4:545–554.Google Scholar
9. Putnam, A. R. 1990. Vegetable weed control with minimal herbicide inputs. HortScience 25:155–159.CrossRefGoogle Scholar
10. Warnell, E. 1990. Reducing pesticide use: The Danish experience. Shell Rep. No. 8, 1990. p. 18–20.Google Scholar