Peronosporales

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Peronosporales
Albugo candida on Capsella bursa-pastoris
Scientific classification
Domain: Eukaryota Kingdom: Chromalveolata Phylum: Heterokontophyta Class: Oomycetes Order: Peronosporales
Families
Albuginaceae Peronosporaceae Pythiaceae

The Peronosporales are an order of water moulds (Class Oomycetes) which can be pathogenic.

Many diseases of plants are sometimes classified under this order, but are sometimes considered members of order Pythiales. Some of these pathogenic protists include the organisms responsible for potato blight, eucalyptus dieback, sudden oak death, and blue mold. Further genetic studies may place these organisms more definitively in one order or another.