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Influence of Adjuvants on the Antagonism of Graminicides by Broadleaf Herbicides

Published online by Cambridge University Press:  12 June 2017

David L. Jordan
David L. Jordan*
Affiliation:
Northeast Res. Stn., Louisiana State Univ. Agric. Cent., P.O. Box 438, St. Joseph, LA 71366
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Abstract

Field experiments evaluated barnyardgrass, broadleaf signalgrass, and rhizomatous johnsongrass control with sethoxydim, clethodim, fluazifop-P, quizalofop-P, and fenoxaprop applied alone and with bentazon or chlorimuron when crop oil concentrate or BCH 815 was used. Bentazon strongly antagonized sethoxydim and clethodim. BCH 815 partially reduced the antagonism with sethoxydim and clethodim compared with crop oil concentrate. Chlorimuron was most antagonistic towards fluazifop-P, fenoxaprop, and quizalofop-P, and BCH 815 did not reduce antagonism. Additional experiments evaluated Italian ryegrass control with diclofop applied alone and with bromoxynil, metribuzin, 2,4-D amine, or tribenuron plus thifensulfuron with these adjuvants. The amine formulation of 2,4-D and tribenuron plus thifensulfuron reduced Italian ryegrass control with diclofop, irrespective of the adjuvant.

Keywords

bromoxynil, 3,5-dibromo-4-hydroxybenzonitrilediclofop, (±)-2-[4-(2,4-dichlorophenoxy)phenoxy]propanoic acidfenoxaprop, (±)-2-[4-[(6-chloro-2-benzoxazolyl)oxy]phenoxy]propanoic acidquizalofop-P, (±)-2-[4-[(6-chloro-2-quinoxalinyl)oxy]phenoxy]propanoic acidsethoxydim, 2-[1-(ethoxyimino)butyl]-5-[2-(ethylthio)propyl]-3-hydroxy-2-cyclohexen-1-one2,4-D amine, (2,4-dichlorophenoxy)acetic acid, dimethylamine saltbarnyardgrass, Echinochloa crus-galli (L.) Beauv. # ECHCGbroadleaf signalgrass, Brachiaria platyphylla (Griseb.) Nash # BRAPPItalian ryegrass, Lolium multiflorum Lam. # LOLMUjohnsongrass, Sorghum halepense (L.) Pers. # SORHABCH 815crop oil concentrateherbicide interactionbentazonbromoxynilchlorimuronclethodimdiclofopfenoxapropfluazifop-Pmetribuzinquizalofop-Psethoxydimthifensulfurontribenuron2,4-DBrachiaria platyphyllaEchinochloa crus-galliLolium multifluromSorghum halepenseBRAPPECHCGLOLMUSORHA
Type
Research
Information
Weed Technology , Volume 9 , Issue 4 , December 1995 , pp. 741 - 747
Copyright
Copyright © 1995 by the Weed Science Society of America 

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References

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