The Peronosporales are an order of water moulds (class Oomycetes) which can be pathogenic.[1]

Albugo candida.jpg
Albugo candida on Capsella bursa-pastoris
Scientific classification e
Kingdom: Chromista
Phylum: Oomycota
Order: Peronosporales
A. Fisch.
(list may not be complete)

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.[citation needed]


  1. ^ Singh (2010). Text Book Of Botany Diversity Of Microbes And Cryptogams. Rastogi Publications. p. 264. ISBN 978-81-7133-889-4.