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Tolerance of Five Perennial Cool-Season Grasses to Fluazifop

Published online by Cambridge University Press:  12 June 2017

Stuart L. Warren ,
Walter A. Skroch ,
Thomas J. Monaco  and
John M. Shribbs
Stuart L. Warren
Affiliation:
Dep. Hortic. Sci., N.C. State Univ., Raleigh, NC 27695-7609
Walter A. Skroch
Affiliation:
Dep. Hortic. Sci., N.C. State Univ., Raleigh, NC 27695-7609
Thomas J. Monaco
Affiliation:
Dep. Hortic. Sci., N.C. State Univ., Raleigh, NC 27695-7609
John M. Shribbs
Affiliation:
Dep. Hortic. Sci., N.C. State Univ., Raleigh, NC 27695-7609
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Abstract

Five perennial cool-season grasses: Kentucky bluegrass, creeping red fescue, tall fescue, orchardgrass, and perennial ryegrass were treated at the 2- to 3-leaf, 3- to 4-leaf, 4- to 6-leaf, and 6- to 7-leaf growth stages with four rates (0, 0.14, 0.28, and 0.56 kg ai/ha) of the butyl ester of fluazifop. Creeping red fescue was not injured by any rate at any growth stage. Reduction in shoot dry weight increased linearly with increasing fluazifop rate for the remaining four species, except for the 6- to 7-leaf stage in Kentucky bluegrass and the 4- to 6-leaf stage in tall fescue and perennial ryegrass. Significant differences between growth stages within each rate varied with species. In general, tolerance increased at the 4- to 6-leaf and 6- to 7-leaf growth stages.

Keywords

Fluazifop, (±)-2-[4-[[5-(trifluoromethyl)-2-pyridinyl] oxy] phenoxy] propanoic acidKentucky bluegrass, Poa pratensis L. #3 POAPRcreeping red fescue, Festuca rubra spp. rubra L. # FESRUtall fescue, Festuca arundinacea Schreb. ‘KY-31’ # FESARorchardgrass, Dactylis glomerata L. # DACGLperennial ryegrass, Lolium perenne L. ‘Citation’ # LOLPEHerbicide toleranceDACGLFESARFESRULOLPEPOAPR
Type
Research
Information
Weed Technology , Volume 3 , Issue 2 , June 1989 , pp. 385 - 388
Copyright
Copyright © 1989 by the Weed Science Society of America 

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References

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