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Ulocladium atrum as a biological control agent for white mold of bean caused bySclerotinia sclerotiorum

  • Phytopathology
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Abstract

Field studies were conducted near Lethbridge, Alberta, Canada, in 2001, 2004 and 2005 to determine the efficacy of the antagonistic fungusUlocladium atrum for control of white mold of bean caused bySclerotinia sclerotiorum. Results of the 3 years of field trials showed that, compared with the untreated control, foliar application of a spore suspension ofU. atrum (300 ml m−2 of 106 spores ml−1 suspension) significantly reduced incidence and severity of white mold, increased seed yield and reduced contamination of bean seed by sclerotia ofS. sclerotiorum. The level of control of white mold observed in the treatment ofU. atrum was similar to that of the mycoparasitic fungusConiothyrium minitans, but lower than the fungicide treatments of Ronilan (vinclozolin) at the rate of 1200 g ha−1 per application in 2001, or Lance (boscalid) at the rate of 750 g ha−1 per application in 2004 and 2005. The potential for use ofU. atrum as a biological control agent for sclerotinia diseases is discussed.

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Authors and Affiliations

  1. Agriculture and Agri-Food Canada, Lethbridge Research Centre, T1J 4B1, Lethbridge, AB, Canada

    Hung-Chang Huang & R. Scott Erickson

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  1. Hung-Chang Huang
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  2. R. Scott Erickson
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Correspondence to Hung-Chang Huang.

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http://www.phytoparasitica.org posting Nov. 12, 2006.

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Huang, HC., Erickson, R.S. Ulocladium atrum as a biological control agent for white mold of bean caused bySclerotinia sclerotiorum . Phytoparasitica 35, 15–22 (2007). https://doi.org/10.1007/BF02981057

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  • DOI: https://doi.org/10.1007/BF02981057

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