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Harvest losses of canola (Brassica napus) cause large seedbank inputs

Published online by Cambridge University Press:  20 January 2017

Robert H. Gulden ,
Steven J. Shirtliffe  and
A. Gordon Thomas
Robert H. Gulden
Affiliation:
Department of Plant Sciences, University of Saskatchewan, 51 Campus Drive, Saskatoon, SK, Canada S7N 5A8
A. Gordon Thomas
Affiliation:
Agriculture and Agri-Food Canada, Saskatoon Research Centre, 107 Science Place, Saskatoon, SK, Canada S7N 0X2
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Abstract

The occurrence of volunteer canola has been increasing in western Canada. The objective of this study was to determine the canola seedbank additions incurred during crop harvest on commercial farms. Over 2 yr, 35 fields of 15 different producers were sampled after harvest using a vacuum cleaner. The canola seeds were separated from the crop residue and soil, and yield loss, 1,000-seed weight, and seedbank additions were determined for each field. Further information for each field was obtained through a producer survey questionnaire. Average yield losses of 107 kg ha−1 or 5.9% of the crop seed yield were observed. This amounted to seedbank additions of approximately 3,000 viable seeds m−2. The yield losses among producers ranged from 3.3 to 9.9% or 9 to 56 times the normal seeding rate of canola. Even with relatively low persistence rates, seedbanks of this magnitude could result in significant volunteer populations for several years, without further seedbank additions from escaped volunteers.

Keywords

Canola, Brassica napus L.Weed seedbankharvest efficiency
Type
Research Article
Information
Weed Science , Volume 51 , Issue 1 , February 2003 , pp. 83 - 86
Copyright
Copyright © Weed Science Society of America 

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References

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