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Influence of Residual Herbicides on Rate of Paraquat and Glyphosate in Stale Seedbed Soybean (Glycine max)

Published online by Cambridge University Press:  12 June 2017

Andrew J. Lanie ,
James L. Griffin ,
Daniel B. Reynolds  and
P. Roy Vidrine
Andrew J. Lanie
Affiliation:
Dep. Plant Pathol. Crop Physiol., 302 Life Sci. Bldg., Baton Rouge, LA 70803
James L. Griffin
Affiliation:
Dep. Plant Pathol. Crop Physiol., 302 Life Sci. Bldg., Baton Rouge, LA 70803
Daniel B. Reynolds
Affiliation:
Northeast Research Stn., St. Joseph, LA 71366
P. Roy Vidrine
Affiliation:
Dean Lee Res. Stn., Alexandria, LA 71302
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Abstract

Field studies were conducted to evaluate weed control with paraquat and glyphosate applied at various rates alone and in combination with residual herbicides. Morningglory, prickly sida, and hemp sesbania control 28 d after treatment was similar regardless of herbicide treatment. In contrast, barnyardgrass control when paraquat was tank mixed with pendimethalin plus imazaquin was equal to that of paraquat alone but less than that for tank mixtures with metolachlor plus metribuzin plus chlorimuron or metolachlor plus metribuzin. Barnyardgrass control and soybean yield when paraquat was applied at 1050 g ai/ha in combination with metolachlor plus metribuzin plus chlorimuron or metolachlor plus metribuzin was greater than when the same residual herbicide treatments were applied with paraquat at 350 g/ha. Yield following glyphosate at 840 and 1120 g ai/ha in combination with residual herbicides was no greater than when glyphosate was applied alone, which was reflective of barnyardgrass control. Tank mixtures of glyphosate at 1680 g/ha with metolachlor plus metribuzin plus chlorimuron or metolachlor plus metribuzin resulted in soybean yield higher than for glyphosate alone. Regardless of the glyphosate and residual herbicide combination, soybean yield was no greater than when paraquat was applied at 350 g/ha in combination with metolachlor plus metribuzin plus chlorimuron.

Keywords

Chlorimuron, 2-[[[[(4-chloro-6-methoxy-2-pyrimidinyl)amino)carbonyl]amino]sulfonyl]benzoic acidglyphosate, N-(phosphonomethyl)glycineimazaquin, 2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl]-3-quinolinecarboxylic acidmetolachlor, 2-chloro-N-(2-ethyl-6-methylphenyl)-N-(2-methoxy-1-methylethyl)acetamidemetribuzin, 4-amino-6-(1,1-dimethylethyl)-3-(methylthio)-1,2,4-triazin-5(4H)-oneparaquat, 1,1′-dimethyl-4,4′-bipyridinium ionpendimethalin, N-(1-ethylpropyl)-3,4-dimethyl-2,6-dinitrobenzenaminebarnyardgrass, Echinochloa crus-galli (L.) Beauv. # ECHCGentireleaf morningglory, Ipomoea hederacea var. integriuscula Gray # DPOHGhemp sesbania, Sesbania exaltata (Raf.) Rydb. ex A. W. Hill # SEBEXpitted morningglory, Ipomoea lancunosa L. # IPOLAprickly sida, Sida spinosa L. # SIDSPsoybean, Glycine max (L.) Merr.Herbicide combinationsminimum tillagereduced tillagechlorimuronimazaquinmetolachlormetribuzinpendimethalinECHCGIPOHGIPOLASEBEXSIDSP
Type
Research
Information
Weed Technology , Volume 7 , Issue 4 , December 1993 , pp. 960 - 965
Copyright
Copyright © 1994 by the Weed Science Society of America 

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References

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