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The Influence of Weed Management in Wheat (Triticum aestivum) Stubble on Weed Control in Corn (Zea mays)

Published online by Cambridge University Press:  12 June 2017

Theodore M. Webster ,
John Cardina  and
Mark M. Loux
Theodore M. Webster
Affiliation:
Department of Horticulture and Crop Science, Ohio Agricultural Research and Development Center, Ohio State University, Wooster, OH 44691
John Cardina
Affiliation:
Department of Horticulture and Crop Science, Ohio Agricultural Research and Development Center, Ohio State University, Wooster, OH 44691
Mark M. Loux
Affiliation:
Department of Horticulture and Crop Science, Ohio State University, Columbus, OH 43210
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Abstract

The objectives of this study were to determine how the timing of weed management treatments in winter wheat stubble affects weed control the following season and to determine if spring herbicide rates in corn can be reduced with appropriately timed stubble management practices. Field studies were conducted at two sites in Ohio between 1993 and 1995. Wheat stubble treatments consisted of glyphosate (0.84 kg ae/ha) plus 2,4-D (0.48 kg ae/ha) applied in July, August, or September, or at all three timings, and a nontreated control. In the following season, spring herbicide treatments consisted of a full rate of atrazine (1.7 kg ai/ha) plus alachlor (2.8 kg ai/ha) preemergence, a half rate of these herbicides, or no spring herbicide treatment. Across all locations, a postharvest treatment of glyphosate plus 2,4-D followed by alachlor plus atrazine at half or full rates in the spring controlled all broadleaf weeds, except giant ragweed, at least 88%. Giant foxtail control at three locations was at least 83% when a postharvest glyphosate plus 2,4-D treatment was followed by spring applications of alachlor plus atrazine at half or full rates. Weed control in treatments without alachlor plus atrazine was variable, although broadleaf control from July and August glyphosate plus 2,4-D applications was greater than from September applications. Where alachlor and atrazine were not applied, August was generally the best timing of herbicide applications to wheat stubble for reducing weed populations the following season.

Keywords

Giant ragweed, Ambrosia trifida L. # AMBTRgiant foxtail, Setaria faberi Herrm. # SETFAalachlor, 2-chloro-N-(2,6-diethylphenyl)-N-(methoxymethyl)acetamideatrazine, 6-chloro-N-ethyl-N'-(1-methylethyl)-1,3,5-triazine-2,4-diamineglyphosate, N-(phosphonomethyl)glycine2,4-D, (2,4-dichlorphenoxy)acetic acidcorn, Zea mays L.winter wheat, Triticum aestivum L.Ecofallowfall applicationglyphosate2,4-Dwheat stubble managementAMBELAMBTRCHEALCIRARCYPESDIGSAERICAPANDIPOLPYSETFADAP, days after plantingPRE, preemergence
Type
Research
Information
Weed Technology , Volume 12 , Issue 3 , September 1998 , pp. 522 - 526
Copyright
Copyright © 1998 by the Weed Science Society of America 

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References

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