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Potential Benefit and Risk of Fluridone as a Fall Germination Stimulant in Western Canada

Published online by Cambridge University Press:  27 September 2017

Breanne D. Tidemann ,
Linda M. Hall ,
K. Neil Harker  and
Hugh J. Beckie
Breanne D. Tidemann*
Affiliation:
Graduate Student and Professor, Department of Agriculture, Food and Nutritional Science, University of Alberta, 410 Agriculture and Forestry Center, Edmonton, AB T6G 2P5, Canada
Linda M. Hall
Affiliation:
Graduate Student and Professor, Department of Agriculture, Food and Nutritional Science, University of Alberta, 410 Agriculture and Forestry Center, Edmonton, AB T6G 2P5, Canada
K. Neil Harker
Affiliation:
Research Scientist, Agriculture and Agri-Food Canada (AAFC), 6000 C&E Trail, Lacombe, AB T4L 1W1, Canada
Hugh J. Beckie
Affiliation:
Research Scientist, AAFC, 107 Science Place, Saskatoon, SK S7N 0X2, Canada
*
*Corresponding author’s E-mail: [email protected]
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Abstract

Herbicide resistance has increased the need for novel weed control strategies. Fluridone has herbicidal as well as potential germination stimulant activity. The objectives of this study were to evaluate fluridone as a fall-applied germination stimulant for weed control and to assess rotational crop tolerance. Fall-applied fluridone was compared with a nontreated control in areas established with false cleavers, volunteer canola, and wild oat at Lacombe, AB, in 2014–2015 and 2015–2016, and at St Albert, AB, in 2015–2016. In the fall, there was a trend for weed densities to be higher in fluridone treatments than in untreated controls across site-years. The stimulatory effect of fluridone on weed germination was not statistically significant in fall assessments, while the weed control effect was significant in 33% of spring assessments. While fluridone reduced weed biomass for some site-years, it also reduced canola crop emergence and biomass at St Albert in 2015–2016, and caused injury symptoms on wheat and field pea. Risk of carryover to subsequent crops outweighed the benefits of using fluridone in the fall to stimulate weed germination in this study.

Keywords

Fluridonefalse cleavers, Galium spurium L. GALSPcanola, Brassica napus L. BRSNNwild oat, Avena fatua L. AVEFAfield pea, Pisum sativum L.; wheat, Triticum aestivum L.Crop injurycrop toleranceherbicide carryoverintegrated weed managementsoil seedbank management.
Type
Notes
Information
Weed Technology , Volume 31 , Issue 5 , October 2017 , pp. 773 - 780
Copyright
© Weed Science Society of America, 2017 

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Footnotes

Associate Editor for this paper: Andrew Kniss, University of Wyoming

References

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