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Influence of Growth Stage and Broadleaf Herbicides on Tralkoxydim Activity

Published online by Cambridge University Press:  12 June 2017

K. Neil Harker  and
Robert E. Blackshaw
K. Neil Harker
Affiliation:
Weed Sci., Agric. Can. Res. Stn., Bag Service 5000, Lacombe, AB, Canada TOC 1S0
Robert E. Blackshaw
Affiliation:
Weed Sci., Agric. Can. Res. Stn., Lethbridge, AB, Canada T1J 4B1
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Abstract

Experiments were conducted at the Lacombe and Lethbridge Research Stations to determine tralkoxydim activity at two leaf stages of green foxtail and wild oat and to determine tralkoxydim activity in tank mixtures with bromoxynil and thifensulfuron. Green foxtail and wild oat control was usually better when tralkoxydim was applied at the 2- to 3-leaf stage. However, tralkoxydim applied at the 4- to 5-leaf stage of the weeds often led to less weed topgrowth at harvest because later flushes of green foxtail and wild oat often occurred after the early applications. Nevertheless, wheat and barley yields usually indicated the importance of early weed removal. In greenhouse and field tank mixture studies, thifensulfuron antagonized tralkoxydim activity on green foxtail more than wild oat. Bromoxynil was less antagonistic than thifensulfuron, but significant reductions in green foxtail and wild oat control were detected in tralkoxydim tank mixtures with bromoxynil. In field studies, control of false cleavers with thifensulfuron or bromoxynil was not reduced in tank mixtures with tralkoxydim.

Keywords

bromoxynil, 3,5-dibromo-4-hydroxybenzonitrilethifensulfuron, 3-[[[[(4-methoxy-6-methyl-1,3,5-triazin-2-yl)amino]carbonyl]amino]sulfonyl]-2-thiophenecarboxylic acidtralkoxydim, 2-[1-(ethoxyimino)propyl]-3-hydroxy-5-(2,4,6-trimethylphenyl)cyclohex-2-enonefalse cleavers, Galium spurium L.green foxtail, Setaria viridis (L.) Beauv. # SETVIwild oat, Avena fatua L. # AVEFAbarley, Hordeum vulgare L.wheat, Triticum aestivum L.Antagonismherbicide mixturesfalse cleaversGalium spuriumAVEFASETVI
Type
Weed Control and Herbicide Technology
Information
Weed Science , Volume 39 , Issue 4 , December 1991 , pp. 650 - 659
Copyright
Copyright © 1992 by the Weed Science Society of America 

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