Golovinomyces powdery mildews on Asteraceae in the Czech Republic

https://doi.org/10.17221/129/2019-PPSCitation:Mieslerová B., Kitner M., Petřeková V., Dvořáková J., Sedlářová M., Cook R.T.A., Lebeda A. (2020): Golovinomyces powdery mildews on Asteraceae in the Czech Republic. Plant Protect. Sci., 56: 163-179.
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Powdery mildews on the Asteraceae family were surveyed during 2007–2015 in the Czech Republic with the aim to increase our knowledge about occurrence, morphological characteristics and host specificity of powdery mildews on this family. In total, 32 host species with symptoms of powdery mildew were collected, and the fungal species were identified based on microscopic observations. These showed great variability in their morphological characteristics. Our study confirmed the high host specificity of powdery mildew species to their original hosts. A deeper knowledge of the taxonomy of the Asteraceae has brought substantial changes in the delimitation of powdery mildew species. In particular, delimitation of the three varieties of Golovinomyces asterum was studied and discussed.

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