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Effect of DPX-PE350 on the Efficacy of Graminicides

Published online by Cambridge University Press:  12 June 2017

Kenneth L. Ferreira  and
Harold D. Coble
Kenneth L. Ferreira
Affiliation:
Dep. Crop Sci., North Carolina State Univ., Raleigh, NC 27695-7620
Harold D. Coble
Affiliation:
Dep. Crop Sci., North Carolina State Univ., Raleigh, NC 27695-7620
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Abstract

Field experiments were conducted to determine the effect of DPX-PE350 on the efficacy of fluazifop-P, sethoxydim, and quizalofop. DPX-PE350 severely antagonized the activity of fluazifop-P on large crabgrass. Antagonism of sethoxydim and quizalofop was dependent on rate of graminicide and large crabgrass stage of growth at application. DPX-PE350 did not reduce control of johnsongrass with quizalofop. Sethoxydim alone controlled 36 to 71% more johnsongrass than sethoxydim mixed with DPX-PE350 at 35 to 105 g ai ha-1. Antagonism of fluazifop-P activity was dependent upon the rate of DPX-PE350 and fluazifop-P applied. Applying DPX-PE350 3 d after fluazifop-P or sethoxydim reduced antagonism. Grass species, growth stage, rate, and sequential application timing all appear to play a role in the severity of antagonism.

Keywords

DPX-PE350, sodium 2-chloro-6-(4,5-dimethoxypyrimidin-2-yl-thio)benzoatefluazifop-P, (R)-2-[4-[[5-(trifluoromethyl)-2-pyridinyl]oxy]phenoxy]propanoic acidquizalofop, (α)-2-[4[(6-chloro-2-quinoxalinyl)oxy]phenoxy]propanoic acidsethoxydim, 2-[1-(ethoxyimino)butyl]-5-[2-(ethylthio)propyl]-3-hydroxy-2-cyclohexen-1-onelarge crabgrass, Digitaria sanguinalis (L.) Scop. # DIGSAjohnsongrass, Sorghum halepense (L.) Pers. # SORHAAntagonismfluazifop-PsethoxydimquizalofopDIGSASORHA
Type
Weed Control and Herbicide Technology
Information
Weed Science , Volume 42 , Issue 2 , June 1994 , pp. 222 - 226
Copyright
Copyright © 1994 by the Weed Science Society of America 

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References

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