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Evaluation of Plectosporium tabacinum for control of herbicide-resistant and herbicide-susceptible false cleavers

Published online by Cambridge University Press:  20 January 2017

Wenming Zhang ,
Michelle Sulz  and
Karen L. Bailey
Michelle Sulz
Affiliation:
Crop and Plant Management, Alberta Research Council, P.O. Bag 4000, Vegreville, Alberta, Canada T9C 1T4
Karen L. Bailey
Affiliation:
Agriculture and Agri-Food Canada, 107 Science Place, Saskatoon, Saskatchewan, Canada S7N 0X2
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Abstract

A new strain of the fungus Plectosporium tabacinum was isolated from naturally-infected false cleavers plants and evaluated as a bioherbicide for the control of both herbicide-resistant and herbicide-susceptible false cleavers in canola. Plectosporium tabacinum was nonpathogenic to both Argentine canola and Polish canola and to both herbicide-tolerant and conventional cultivars. Plectosporium tabacinum killed false cleavers seedlings when applied at a concentration of 1 × 107 conidia ml−1 and provided with 16 h dew. The efficacy of P. tabacinum on herbicide-resistant false cleavers was identical to that on herbicide-susceptible false cleavers. Catchweed bedstraw was also highly susceptible to P. tabacinum. Further host-range tests on 34 plant species in 26 genera and 12 families demonstrated that P. tabacinum is sufficiently host specific for false cleavers control in western Canada. This fungus may provide a novel approach for managing herbicide-resistant false cleavers.

Keywords

Plectosporium tabacinum (van Beyma) M. E. Palm, W. Gams et NirenbergArgentine canola, Brassica napus L.catchweed bedstraw, Galium aparine L. GALAPfalse cleavers, Galium spurium L. GALSPPolish canola, Brassica rapa L.Bioherbicidebiological control
Type
Research Article
Information
Weed Science , Volume 50 , Issue 1 , February 2002 , pp. 79 - 85
Copyright
Copyright © Weed Science Society of America 

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