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Soybean (Glycine max) Response to Postemergence Herbicide Mixtures Containing 2,4-DB

Published online by Cambridge University Press:  12 June 2017

Alan C. York ,
John W. Wilcut ,
Mark M. Keene  and
Frank R. Walls Jr.
Alan C. York
Affiliation:
Crop Sci. Dep., N.C. State Univ., Raleigh, NC 27695-7620
John W. Wilcut
Affiliation:
Dep. Plant Pathol., Physiol., Weed Sci., Va. Polytech. Inst. State Univ., Suffolk, VA 23437
Mark M. Keene
Affiliation:
Pender County, NC
Frank R. Walls Jr.
Affiliation:
American Cyanamid Co., Goldsboro, NC 27530
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Abstract

Experiments were conducted at 12 locations in North Carolina and Virginia to determine soybean response to postemergence application of 2,4-DB in combination with 420 g ae ha-1 of sodium salt of acifluorfen, 13 g ae ha-1 of ethyl ester of chlorimuron, and 70 g ae ha-1 of ammonium salt of imazethapyr. Adding dimethylamine salt of 2,4-DB at 35 or 70 g ae ha-1 to acifluorfen, chlorimuron, or imazethapyr increased soybean injury 2 to 14% 7 d after application. Soybean quickly recovered and no injury was observed 21 d after application. Acifluorfen, chlorimuron, or imazethapyr alone or in combination with 2,4-DB at 35 g ha-1 did not reduce soybean yield. Adding 2,4-DB at 70 g ha-1 reduced yield at four of the 12 locations.

Keywords

Acifluorfen, 5-[2-chloro-4-(trifluoromethyl)phenoxy]-2-nitrobenzoic acidchlorimuron, 2-[[[[(4-chloro-6-methoxy-2-pyrimidinyl)amino]carbonyl]amino]sulfonyl]benzoic acidimazethapyr, (±)-2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl]-5-ethyl-3-pyridinecarboxylic acid2,4-DB, 4-(2,4-dichlorophenoxy)butanoic acidsoybean, Glycine max (L.) Merr. ‘Centennial’, ‘Deltapine 675’, and ‘9581’Acifluorfenchlorimuronimazethapyrcrop injuryyield
Type
Research
Information
Weed Technology , Volume 5 , Issue 1 , March 1991 , pp. 43 - 47
Copyright
Copyright © 1990 by the Weed Science Society of America 

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References

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