Category:Pseudoperonospora cubensis

**Pseudoperonospora cubensis**
	species of Chromista
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Instance of	taxon;
Common name
	Cymraeg: llwydni hopys; فارسی: سفیدک داخلی; polski: Mączniak rzekomy dyniowatych; 中文: 古巴假單軸黴; 中文（臺灣）: 古巴假單軸黴;
Taxonomy
Superdomain	Biota
Superkingdom	Eukaryota
Subdomain	Diaphoretickes
Class	Oomycota
Class	Peronosporea
Order	Peronosporales
Family	Peronosporaceae
Genus	Pseudoperonospora
Species	Pseudoperonospora cubensis
Taxon author	Semion Rostovtsev, 1903
Authority file
	Q3924916; NCBI taxonomy ID: 143453; Encyclopedia of Life ID: 302379; GBIF taxon ID: 3204007; WoRMS-ID for taxa: 1501336; MycoBank taxon name ID: 120276; Index Fungorum taxon ID: 120276; New Zealand Organisms Register ID: 7ff9aa95-8fcb-4e66-8650-b1c4d730aeaa; EPPO Code: PSPECU; iNaturalist taxon ID: 196477; NBN System Key: NBNSYS0000015480; IRMNG ID: 10379040
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Domain: Eukaryota • Regnum: Chromista • (Unranked): Stramenopiles • Classis: Oomycetes • Ordo: Peronosporales • Familia: Peronosporaceae • Genus: Pseudoperonospora • Species: Pseudoperonospora cubensis

English: Pseudoperonospora cubensis is a species of water mould known for causing downy mildew on cucurbits such as cantaloupe, cucumber, pumpkin, squash and watermelon. This water mould is an important pathogen of all these crops, especially in areas with high humidity and rainfall, such as the eastern United States. In most years the disease is an annual, late-season problem on squash and pumpkin in the eastern and central United States, however, since 2004 it has become one of the most important diseases in cucumber production. Considered a highly destructive foliar disease of cucurbits, successful breeding in the mid-twentieth century provided adequate control of downy mildew in cucumber without the use of fungicides. The resurgence in virulence has caused growers great concern and substantial economic losses, while downy mildew in other cucurbit crops continues to be a yearly hindrance.

Italiano: La peronospora delle cucurbitacee (Pseudoperonospora cubensis) è tra le principali malattie fogliari di zucca, zucchino, melone, anguria, cetriolo e cucurbitacee in genere, sia in coltura protetta che in pieno campo.

Polski: Mączniak rzekomy dyniowatych (Pseudoperonospora cubensis) – gatunek grzybopodobnego lęgniowca (dawniej grzyby) z rodziny Peronosoporaceae, w rzędzie wroślikowców (Peronosporales). Gatunek jest pasożytem bezwzględnym, należy do patogenów wywołujących mączniaki rzekome – grupę chorób roślin porażających głównie liście, łodygi i owoce. W przypadku P. cubensis patogen powoduje szkody zwłaszcza w uprawach dyniowatych.