Phytophthora capensis

Name and publication

Phytophthora capensis Bezuidenhout, Denman, McLeod & Kirk (2010)

Bezuidenhout CM, Denman S, Kirk SA, Botha WJ, Mostert L, and McLeod A. 2010. Phytophthora taxa associated with cultivated Agathosma, with emphasis on the P. citricola complex and P. capensis sp. nov. Persoonia 25: 32–49 (pg. 45).

Corresponding authors e-mails:,


from Bezuidenhout et al. (2010)




from ‘the Cape’ – the historic and generic name given to the area it was isolated from


Type: SOUTH AFRICA, Western Cape Province, on roots of Assegai tree (Curtisia dentata), date unknown, S. von Broembsen, WPC WOC P1819 (World Phytophthora Collection), maintained in metabolically inactive state

Ex-type: cultures P1819 (WPC), CBS 128319

Sequences for ex-type in original manuscript: Phytophthora capensis P1819: ITS GU191232, β-Tub GU191328, TEF-1a GU191199, NADH1 GU191257, cox1 GU191275

Ex-type in other collections:

P1819 (WPC) = CBS 128319 = CPHST BL 10 (Abad), 62C1 (Yang)

Molecular identification

Voucher sequences for barcoding genes (ITS rDNA and COI) of the ex-type (see Molecular protocols page)

Phytophthora capensis isolate CPHST BL 10 (= P1819 WPC) = ITS rDNA MG865466, COI MH136862

Sequences for ex-type in other sources
Position in ITS phylogenetic tree

Clade 2c

Morphological identification

adapted from Bezuidenhout et al. (2010)

Colonies and cardinal temperatures

Phytophthora capensis has distinctive uniform, chrysanthemum pattern colony morphology on carrot agar (CA) and forms abundant aerial mycelium after four days at temperatures between 15–27.5 °C. Cardinal temperatures: minimum 5 °C, optimum 23°C, maximum 28°C.

Asexual phase

Sporangia semipapillate, persistent, limoniform, occasionally ovoid (27–50 μm length x 17–32 μm wide), non-proliferating, formed on single unbranched sporangiophores. Hyphal swellings absent. Chlamydospores absent.

Sexual phase

Homothallic. Oogonia spherical (20–27.5 μm diam.) and formed on the terminal ends of hyphae; antheridia paragynous, single-celled; oospores plerotic (22.7 μm diam.) and thick-walled.

Additional specimen(s) evaluated

Phytophthora capensis ex-type CPHST BL 10 (Abad) = P1819 [World Phytophthora Collection (WPC) California, USA]

Hosts and distribution

Distribution: Africa (South Africa), Asia (Taiwan)
Substrate: roots
Hosts: multiple hosts

Retrieved January 29, 2018 from U.S. National Fungus Collections Nomenclature Database.

Additional references and links

Fact sheet author

Z. Gloria Abad, Ph.D., USDA-APHIS-PPQ-S&T Beltsville Laboratory, United States of America