<Emphasis Type="Italic">Ulocladium atrum</Emphasis> as a biological control agent for white mold of bean caused by<Emphasis Type="Italic">Sclerotinia sclerotiorum</Emphasis> |
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| Authors: | Hung-Chang Huang R Scott Erickson |
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| Institution: | (1) Agriculture and Agri-Food Canada, Lethbridge Research Centre, T1J 4B1 Lethbridge, AB, Canada |
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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.
http://www.phytoparasitica.org posting Nov. 12, 2006. |
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| Keywords: | Antagonism common bean biological control Phaseolus vulgaris Sclerotinia sclerotiorum Ulocladium atrum white mold |
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