Species (515)
- Phytophthora nicotianae Breda de Haan 1896
- Phytophthora syringae (Kleb.) Kleb. 1909
- Phytophthora cinnamomi Rands 1922
- Phytophthora fischeriana (Höhn.) Sparrow 1960
- Phytophthora megasperma Drechsler 1931
- Phytophthora infestans (Mont.) de Bary 1876
- Pleotrachelus wildemanii H.E. Petersen 1910
- Aphanomyces astaci Schikora 1906
- Aphanomyces stellatus de Bary 1860
- Basidiophora entospora Roze & Cornu 1869
- Eraphthora butleri (W. Weston) Telle & Thines 2012
- Wilsoniana amaranthi (Schwein.) Y.J. Choi, Thines & H.D. Shin 2007
- Wilsoniana bliti (Biv.) Thines 2005
- Wilsoniana occidentalis (G.W. Wilson) Abdul Haq & Shahzad 2015
- Wilsoniana portulacae (DC.) Thines 2005
- Bremia elliptica Sawada 1914
- Bremia lactucae Regel 1843
- Hyaloperonospora arabidopsidis (Gäum.) Göker, Riethm., Voglmayr, Weiss & Oberw. 2
- Hyaloperonospora berteroae (Gäum.) Göker, Riethm., Voglmayr, Weiss & Oberw. 2
- Hyaloperonospora brassicae (Gäum.) Göker, Riethm., Voglmayr, Weiss & Oberw. 2
- Hyaloperonospora cardamines-enneaphyllos Voglmayr 2014
- Hyaloperonospora cheiranthi (Gäum.) Göker, Riethm., Voglmayr, Weiss & Oberw. 2
- Hyaloperonospora niessliana (Berl.) Constant. 2002
- Hyaloperonospora praecox Voglmayr & Göker 2011
- Hyaloperonospora rorippae-islandicae (Gäum.) Göker, Voglmayr & Oberw. 2009
- Hyaloperonospora lunariae (Gäum.) Constant. 2002
- Hyaloperonospora galligena (S. Blumer) Göker, Riethm., Voglmayr, Weiss & Ober
- Hyaloperonospora dentariae-macrophyllae (Gäum.) Voglmayr, Y.J. Choi & H.D. Shin 2014
- Hyaloperonospora nasturtii-aquatici (Gäum.) Voglmayr 2013
- Hyaloperonospora nesliae (Gäum.) Göker, Riethm., Voglmayr, Weiss & Oberw. 2
- Hyaloperonospora parasitica (Pers. : Fr.) Constant. 2002
- Hyaloperonospora thlaspeos-arvensis (Gäum.) Göker, Riethm., Voglmayr, Weiss & Oberw. 2
- Hyaloperonospora tribulina (Pass.) Constant. 2002
- Hyaloperonospora teesdaliae (Gäum.) Göker, Riethm., Voglmayr, Weiss & Oberw. 2
- Hyaloperonospora sisymbrii-sophiae (Gäum.) Göker, Voglmayr & Oberw. 2009
- Hyaloperonospora thlaspeos-perfoliati (Gäum.) Göker, Voglmayr, Riethm., Weiss & Oberw. 2
- Hyaloperonospora sisymbrii-loeselii (Gäum.) Göker, Riethm., Voglmayr, Weiss & Oberw. 2
- Peronospora viciae (Berk.) Casp. 1855
- Peronospora verbenae U. Braun, Jage, Udo Richt. & H.J. Zimm. 2009
- Peronospora veronicae-cymbalariae Rayss 1945
- Peronospora vernalis Gäum. 1923
- Peronospora violae de Bary ex J. Schröt. 1886
- Peronospora vincae J. Schröt. 1874
- Peronospora viennotii Mayor 1952
- Peronospora violacea Berk. 1865
- Peronospora vistulensis Wróbl. 1916
- Pustula helianthicola C. Rost & Thines 2012
- Pustula spinulosa (de Bary) Thines 2005
- Pythium montanum Nechw. 2003
- Perofascia lepidii (McAlpine) Constant. 2002
- Peronospora aestivalis Syd. 1923
- Peronospora agrestis Gäum. 1918
- Peronospora affinis Rossmann 1857
- Peronospora agrimoniae Syd. 1923
- Peronospora agrorum Gäum. 1923
- Peronospora agrostemmatis Gäum. 1923
- Peronospora alpicola Gäum. 1923
- Peronospora alsinearum Casp. 1855
- Peronospora alchemillae G.H. Otth 1869
- Peronospora alyssi-calycini Gäum. 1918
- Peronospora alta Fuckel 1863
- Peronospora amaranthi Gäum. 1923
- Peronospora anemones Tramier 1964
- Peronospora androsaces Niessl 1874
- Peronosclerospora maydis (Racib.) C.G. Shaw 1978
- Peronospora antirrhini J. Schröt. 1874
- Peronospora aparines (de Bary) Gäum. 1919
- Peronospora aquatica Gäum. 1918
- Peronospora arabidis-turritae Gäum. 1918
- Peronospora arborescens (Berk.) Casp. 1855
- Peronospora astragali-purpurei Mayor & Vienn.-Bourg. 1949
- Peronospora astragalina Syd. 1923
- Peronospora cerinthes Uljan. 1931
- Peronospora centranthi Massenot 1969
- Peronospora cephalariae Vincens 1913
- Peronospora chelidonii Miyabe 1931
- Peronospora chorisporae Gäum. 1918
- Peronospora argemones Gäum. 1923
- Peronospora arvensis Gäum. 1918
- Peronospora arthurii Farl. 1883
- Peronospora asperuginis J. Schröt. 1886
- Peronospora apiospora G. Poirault 1915
- Peronospora arabidis-glabrae Gäum. 1918
- Peronospora aubrietae Mayor 1964
- Peronospora belbahrii Thines 2009
- Peronospora biscutellae Gäum. 1918
- Peronospora boni-henrici Gäum. 1919
- Peronospora buniadis Gäum. 1918
- Peronospora cakiles Savile 1957
- Peronospora calepinae Gäum. 1918
- Peronospora calaminthae Fuckel 1886
- Peronospora calotheca de Bary 1858
- Peronospora candida Fuckel 1863
- Peronospora cerastii-brachypetali S?vul. & Rayss 1932
- Peronospora cerastii-anomali S?vul. & Rayss 1930
- Peronospora conferta (Unger) Unger 1847
- Peronospora conglomerata Fuckel 1863
- Peronospora chenopodii-polyspermi Gäum. 1919