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Influence of selected fungicides registered in the Czech Republic for winter oilseed rape on in vitro Sclerotinia sclerotiorum mycelial growth

Author

Listed:
  • Jana Poslušná

    (Plant Protection Department, Agritec Plant Research Ltd., Šumperk, Czech Republic)

  • Eva Plachká

    (Research Institute of Oilseed Crops, OSEVA PRO, Ltd., Opava, Czech Republic)

  • Jana Mazáková

    (Department of Plant Protection, Faculty of agrobiology food and natural resources, Czech University of Life Sciences Prague, Prague, Czech Republic)

Abstract

The baseline sensitivity of 55 isolates of Sclerotinia sclerotiorum, collected from oilseed rape in 6 regions of the Czech Republic, to selected fungicides was determined during the period 2013-2015. One single-component fungicide - Horizon (tebuconazole), and four multicomponent fungicides - Pictor (boscalid, dimoxystrobin), Efilor (boscalid, metconazole), Prosaro 250 EC (prothioconazole, tebuconazole), and Propulse (fluopyram, prothioconazole), were chosen as these are commonly used locally. The effect of each fungicide on the in vitro pathogen radial mycelial growth and EC50 values for the respective fungicides were determined. The following MIC values were estimated; for the fungicides Horizon 250 EW, Efilor, and Propulse the mean MIC values ranged between 0.125 and 0.250 µl/ml, for Prosaro 250 EC ranged between 0.0625 and 0.125 µl/ml, and for Pictor ranged from 0.00781 to 0.01562 µl/ml. No strains of S. sclerotiorum resistant to the tested fungicides were detected and the growth of all isolates was fully inhibited at concentrations corresponding to their registered dose rates. The highest fungicidal efficacy on the collected S. sclerotiorum isolates was recorded for Pictor, followed by Prosaro 250 with an EC50 value 0.05856 µl/ml and then the remaining fungicides Propulse, Efilor, and Horizon 250 EW (EC50 values 0.07277, 0.07221, and 0.08519 µl/ml, respectively).

Suggested Citation

  • Jana Poslušná & Eva Plachká & Jana Mazáková, 2018. "Influence of selected fungicides registered in the Czech Republic for winter oilseed rape on in vitro Sclerotinia sclerotiorum mycelial growth," Plant Protection Science, Czech Academy of Agricultural Sciences, vol. 54(2), pages 101-110.
    • Handle: RePEc:caa:jnlpps:v:54:y:2018:i:2:id:137-2016-pps
    DOI: 10.17221/137/2016-PPS
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    References listed on IDEAS

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    1. Tomáš Spitzer & Pavel Matušinsky & Zuzana Klemová & Jan Kazda, 2012. "Effect of fungicide application date against Sclerotinia sclerotiorum on yield and greening of winter rape," Plant Protection Science, Czech Academy of Agricultural Sciences, vol. 48(3), pages 105-109.
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