Phytophthora hydropathica (to be revalidated 2022)

Name and publication

Phytophthora hydropathica Hong and Gallegly (2010)

Hong CX, Gallegly ME, Richardson PA, Kong P, Moorman GW, Lea-Cox JD, and Ross DS. 2010. Phytophthora hydropathica, a new pathogen identified from irrigation water, Rhododendron catawbiense and Kalmia latifolia. Plant Pathology 59: 913–921.


from Hong et al. (2010)




‘Hydro’ and ‘pathica’ refer to the waterborne and pathogenic nature, respectively, of this species.


Type: UNITED STATES OF AMERICA collected from irrigation water of ornamentals by H. Hong in Virginia in 2000 (Typus: 5D1, Holotypus ATCC MYA-4460 and VTMH 11736)

Ex-type: ATCC MYA-4460 and VTMH 11736

Sequences for ex-type in original manuscript: 5D1 = ITS rDNA EU583793, β-tub GQ260069, TEF GQ260061, NADH GQ260065

NOTES: Nom. inval., Art. 40.7 (Melbourne) Index Fungorum ID514043. Original publication incorrectly cites 1 type (5D1) and 2 holotypes (ATCC MYA-4460 and VTMH 11736) Art 8.1.

Hosts and distribution

Distribution: Europe (Italy, Spain), North America (USA: CT, MD, TN, VA)
Substrate: all plant parts
Disease note: damping off, root rot, fruit rot, etc.
Host: diverse hosts, particularly Kalmia latifolia (Ericaceae)

Retrieved January 31, 2018 from U.S. National Fungus Collections Nomenclature Database.

Additional info:
 Rhododendron catawbiense

Additional references and links

Fact sheet author

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