Phytophthora fragariaefolia

Name and publication

Phytophthora fragariaefolia Rahman, Uematsu, Takeuchi, Shirai & Kageyama (2014)

Rahman MZ, Uematsu S, Takeuchi T, Shirai K, Ishiguro Y, Suga H, and Kageyama K. 2014. Two new species, Phytophthora nagaii sp. nov. and P. fragariaefolia sp. nov., causing serious diseases on rose and strawberry plants, respectively, in Japan. J. Gen. Plant Pathol. 80: 348–365.

Corresponding author:


from Rahman et al. (2014)




refers to generic name of the host plant, strawberry (Fragaria ananassa)


Type: JAPAN, Hokkaido Prefecture, from crown of strawberry (Fragaria ananassa), 2005, collector T. Takeuchi; isolate NBRC H-13133-holotypus (freeze-dried specimen)

Ex-type: NBRC 109709 = CBS 135747 (= CH05NSU11, MAFF 244058)

Sequences for ex-type in original manuscript

CH05NSU11 = ITS rDNA AB819580, LSU AB819581, EF1-α AB819578, β-tubulin AB819579, and coxI AB819582

Ex-type in other collections

NBRC 109709 = CBS 135747 = P19990 (WOC/WPC), CPHST BL 141 (Abad), 61H4 (Yang)

Molecular identification

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

Phytophthora fragariaefolia isolate CPHST BL 141 (= P19990 WPC) = ITS rDNA MG865495, COI MH136891

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

Clade 7c

Morphological identification

adapted from Rahman et al. (2014)

Colonies and cardinal temperatures

Colony morphology after 7 days on PDA, V-8, MEA, and HSA with no distinct pattern. Minimum growth temperature 5°C, optimum 28°C, and maximum 33°C.

Conditions for growth and sporulation

Sporangia formed in grass leaf blade water culture. Oogonia and oospore abundantly produced in single culture.

Asexual phase

Sporangia nonpapillate; persistent; ellipsoid, spherical, distorted (28–59 L × 14–43 W μm); with internal (nested or extended) and external proliferation; grown in unbranched and simple sympodial sporangiophores. Hyphal swellings globose and subglobose, terminal and intercalary. Chlamydospores globose intercalary (32 μm diam).

Sexual phase

Homothallic. Oogonia smooth, spherical (26–44 μm diam), sometimes funnel-shaped with tapering base; antheridia predominantly paragynous; spherical, globose, ellipsoid (13–27 L ×12–19 W μm); oospore aplerotic (22–35 μm diam).

Additional specimen(s) evaluated

Phytophthora fragariaefolia ex-type CPHST BL 141, duplicate of P19990 (World Phytophthora Collection)

Hosts and distribution

Distribution: Asia (Japan), Europe (Poland)
Substrate: crowns, soil
Disease note: crown rot
Host: Fragaria x ananassa (Rosaceae), Fraxinus excelsior (Oleaceae)

Retrieved January 30, 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