Phytophthora boodjera

Name and publication

Phytophthora boodjera Simamora & Burgess (2015)

Simamora AV, Stukely MJC, Hardy GE StJ , Burgess TI. 2015. Phytophthora boodjera sp. nov., a damping-off pathogen in production nurseries and from urban and natural landscapes, with an update on the status of P. alticola. IMA Fungus 6: 319–335 (pg. 326).

Corresponding author:


from Simamora et al. (2015)




from the Noongar (local Aboriginal) name for earth, ground, or sand plain


Type: AUSTRALIA. Western Australia: Tincurrin, from nursery soil dump, Mar. 2012, collected by the Vegetation Health Service of the Department of Parks and Wildlife (MURU 470)

Ex-type: cultures CBS 138637 = VHS 26806

Sequences for ex-type in original manuscript: VHS26806: ITS KJ372244, β-tubulin KJ372283, HSP90 KJ396710, enolase KJ396738 and coxI KJ396688

Ex-type in other collections

CBS 138637 = VHS 26806 = CPHST BL 178  (Abad)

Molecular identification

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

Phytophthora boodjera isolate VHS26806 ITS rDNA KJ372244

Phytophthora boodjera isolate CPHST BL 181 (= VHS26806) COI MH477743

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

Clade 4

Morphological identification

Colonies and cardinal temperatures

Colony morphology is appressed with no distinctive growth pattern and regular smooth margins on CA, V8A, MEA, and PDA. Minimum growth temperature 10°C, optimum 25–30°C, and maximum 35°C.

Conditions for growth and sporulation

Sporangia are produced in water cultures (soil extract or river water) and not observed in solid media. Oogonia are formed readily in single-strain culture on CA and V8A after about 14 d.

Asexual phase

Sporangia are papillate, persistent, and predominantly ovoid and limoniform. Sporangia average 34.7 ±1.16 x 27 ± 0.78 mm (overall range 15.2–62.3 mm x 14.6–42.5 mm). Sporangiophores in simple sympodia with no proliferation. Hyphal swellings are rare. Chlamydospores absent

Sexual phase

Homothallic. Oogonia are globose with wavy walls turning golden-brown on maturity, average size 29.4 ± 2.3 mm (24.6–33.4 mm) Oospores are aplerotic, globose with thick walls, average size 25.5 ± 1.9 µm (21.3–29.5). Antheridia are paragynous.

Most typical characters

Phytopthora boodjera forms a species complex with Phytophthora arenaria and Phytophthora alticola and is morphologically very similar to these species, but has a higher optimum and maximum for growth.

Specimen(s) evaluated

Australia; Western Australia: Tincurrin, from nursery soil dump, Mar. 2012, collected by Department of Parks and Wildlife, CBS 138637 = VHS 26806; Mt Claremont, Perth, WA, from roots of dying Agonis flexuosa, May 2011; PA. Barber, PAB 11.67, Dalkeith, Perth, WA, from roots of dying Eucalyptus marginata, May 2011; VHS 16282, Ravensthorpe, WA, from Banksia media, Aug. 2006; VHS 26631, Kensington, Perth, WA, from Eucalyptus sp., Feb. 2012; VHS 27016, VHS 27017, VHS 27018, VHS 27020, VHS 27021, VHS 27022, Tincurrin, WA, from Eucalyptus spp., Apr. 2012; VHS 27171, Tincurrin, WA, from roots of E. polybractea, Apr. 2012; VHS 27382, Stirling, Perth, WA, from Xanthorrhoea preissii, Nov. 2012; VHS 28352, Gingin, WA, from Banksia grandis, Nov. 2012; T. Paap, TP13.39, Northam, WA, from Corymbia calophylla, Sept. 2013.

Phytophthora boodjera CPHST BL 178 duplicate of VHS 26806 = CBS 138637 (ex-type)

Hosts and distribution

Distribution: Western Australia
Substrate: soil and root baits
Disease note: dieback, causes damping-off disease of young eucalypt seedlings
Hosts: Agonis flexuosa, Eucalyptus marginata, Eucalyptus polybracta, Eucalyptus kochii subsp. plenissima, Eucalyptus kochii subsp. borealis, Eucalyptus loxophleba subsp. lissophloia, Eucalyptus loxophleba subsp.gratiae, Xanthorrhoea preissii, Corymbia calophylla

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

Additional references and links

  • Phytophthora DATABASE: Phytophthora boodjera
  • EPPO-Q-bank: Phytophthora boodjera
  • SMML USDA-ARS: Phytophthora boodjera
  • EPPO Global Database: Phytophthora boodjera
  • CABI Invasive Species Compendium: Phytophthora boodjera
  • Encyclopedia of Life (EOL): Phytophthora boodjera
  • Index Fungorum (IF): Phytophthora boodjera
  • Plantwise Knowledge Bank: Phytophthora boodjera

Fact sheet authors

Treena Burgess, Ph.D., Centre for Phytophthora Science and Management, School of Biological Sciences and Biotechnology, Murdoch University, Australia; Z. Gloria Abad, Ph.D., USDA-APHIS-PPQ-S&T Beltsville Laboratory, United States of America