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A Rapid Bioassay to Detect Trifluralin-Resistant Green Foxtail (Setaria viridis)

Published online by Cambridge University Press:  12 June 2017

Hugh J. Beckie ,
Lyle F. Friesen ,
Ken M. Nawolsky  and
Ian N. Morrison
Hugh J. Beckie
Affiliation:
Dep. Plant Sci., Univ. Manitoba, Winnipeg, MB., Canada, R3T 2N2
Lyle F. Friesen
Affiliation:
Dep. Plant Sci., Univ. Manitoba, Winnipeg, MB., Canada, R3T 2N2
Ken M. Nawolsky
Affiliation:
Dep. Plant Sci., Univ. Manitoba, Winnipeg, MB., Canada, R3T 2N2
Ian N. Morrison
Affiliation:
Dep. Plant Sci., Univ. Manitoba, Winnipeg, MB., Canada, R3T 2N2
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Abstract

In a petri dish assay, radicle growth of trifluralin-resistant (R) green foxtail exposed to trifluralin concentrations of up to 0.4 ppm (w/v) was not inhibited. Radicle growth of trifluralinsusceptible (S) biotypes was completely inhibited. Shoots were more sensitive to trifluralin than roots, with shoot growth being inhibited for both R and S biotypes at trifluralin concentrations of 0.2 ppm or more. Best discrimination between R and S green foxtail biotypes was achieved by measuring radicle length after incubation of pregerminated caryopses at 0.3 ppm trifluralin in the dark for 5 d at 22 C.

Keywords

Trifluralin, 2,6-dinitro-N,N-dipropyl-4-(trifluoromethyl)benzenaminegreen foxtail, Setaria viridis (L.)Beauv. ♯3 SETVIHerbicide resistanceSETVI
Type
Research
Information
Weed Technology , Volume 4 , Issue 3 , September 1990 , pp. 505 - 508
Copyright
Copyright © 1990 Weed Science Society of America 

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References

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