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Fluazifop-P Reduces Strawberry (Fragaria x ananassa) Tolerance to Terbacil

Published online by Cambridge University Press:  12 June 2017

Klaus I. N. Jensen ,
Douglas J. Doohan  and
Eric G. Specht
Klaus I. N. Jensen
Affiliation:
Agric. and Agri-Food Canada, Kentville Res. Cent., Kentville, NS B4N 1J5
Douglas J. Doohan
Affiliation:
Nova Scotia Dep. Agric. and Market., Truro, NS, Canada B2N 5E3
Eric G. Specht
Affiliation:
Agric. and Agri-Food Canada, Kentville Res. Cent., Kentville, NS B4N 1J5
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Abstract

Greenhouse and field experiments were conducted to characterize a synergistic interaction between fluazifop-P and terbacil in strawberry (Fragaria x ananassa Duchesne). In the greenhouse, injury from foliar terbacil applications generally increased two- or more fold when 75 or 150 g/ha fluazifop-P was applied foliarly 24 h later to either a terbacil tolerant (‘Veestar’) or sensitive (‘Kent’) strawberry cultivar. Synergism also occurred when terbacil was applied as a soil drench and fluazifop-P was applied 5 d later. There was little difference in effect between tank-mixed and sequential applications made 0.5 and 20 min apart. Increased injury was also observed with intervals up to 6 d between applications in the greenhouse, and the order of herbicide application did not affect injury level. Similar results were obtained in field experiments on newly planted ‘Honeoye’ and ‘Cavendish’ strawberry. An interval of 6 d or more between terbacil and fluazifop-P application is suggested to minimize the risk of increased crop injury.

Keywords

Fluazifop-P, (R)-2-[4-[[5-(trifluoromethyl)-2-pyridinyl]oxy]phenoxy]propanoic acidterbacil, 5-chloro-3-(1,1-dimethylethyl)-6-methyl-2,4-(1H,3H)-pyrimidinedionestrawberry, Fragaria x ananassa Duchesne ‘Cavendish,’ ‘Honeoye,’ ‘Kent,’ ‘Veestar.’Interactionherbicide injurysynergism
Type
Research
Information
Weed Technology , Volume 10 , Issue 4 , December 1996 , pp. 883 - 888
Copyright
Copyright © 1996 by the Weed Science Society of America 

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