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Herbicide Evaluations for No-Till Soybean (Glycine max) Production in Corn (Zea mays) Residue

Published online by Cambridge University Press:  12 June 2017

Russell S. Moomaw  and
Alex R. Martin
Russell S. Moomaw
Affiliation:
Northeast Res. and Ext. Ctr., Univ. of Nebraska, Concord, NE 68728
Alex R. Martin
Affiliation:
Dep. Agron., Univ. of Nebraska, Lincoln, NE 68583
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Abstract

Weed control in no-till soybeans [Glycine max (L.) Merr. ‘Wells’] planted into shredded corn (Zea mays L.) residue was evaluated at Concord, NE, over a 3-yr period. Herbicide factors evaluated were time of herbicide application for no-till soybeans, efficacy of glyphosate [N-(phosphonomethyl)glycine] relative to paraquat (1,1’-dimethyl-4,4’-bipyridinium ion) for control of emerged weeds, and the efficacy of alachlor [2-chloro-2’,6’-diethyl-N-(methoxymethyl)acetanilide], metolachlor [2-chloro-N-(2-ethyl-6-methylphenyl)-N-(2-methoxy-1-methylethyl)acetamide], oryzalin (3,5-dinitro-N4,N4-dipropylsulfanilamide), and pendimethalin [N-(1-ethylpropyl)-3,4-dimethyl-2,6-dinitrobenzenamine] for residual weed control. Combination residual and contact herbicide treatments were applied either as a preplant surface application or preemergence after no-till-planted soybeans. Removal of existing weed growth was not consistently better with the preplant surface application compared to later removal after soybean planting. Paraquat and glyphosate gave nearly equal control of emerged weeds. Addition of 2,4-D [(2,4-dichlorophenoxy)acetic acid] with paraquat in the tank mix did not improve weed control. Use of narrow, ripple coulters on the no-till planter resulted in minimal disturbance of the preplant surface herbicide so that additional preemergence herbicide at planting was seldom beneficial.

Keywords

Conservation tillageecofarmingalachlorchlorambenglyphosatemetolachlormetribuzinoryzalinparaquatpendimethalin2,4-D
Type
Research Article
Information
Weed Science , Volume 33 , Issue 5 , September 1985 , pp. 679 - 685
Copyright
Copyright © 1985 by the Weed Science Society of America 

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References

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