Distribution, Host Range and Disease Severity of Pseudoperonospora cubensis on Cucurbits in the Czech Republic

Cucurbit downy mildew, caused by Pseudoperonospora cubensis, is a major cucumber disease in the Czech Republic. Disease prevalence, host range and disease severity were evaluated from 2001 to 2009. The geographical distribution of P. cubensis was assessed on ca 80–100 locations per year in two main...

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Bibliographic Details
Published in:Journal of phytopathology 2011-09, Vol.159 (9), p.589-596
Main Authors: Lebeda, Aleš, Pavelková, Jana, Urban, Jiří, Sedláková, Božena
Format: Article
Language:English
Subjects:
Biological and medical sciences
Crops
Cucumis melo
Cucumis sativus
cucurbit downy mildew
Cucurbita moschata
cucurbits
Czech Republic
disease prevalence
disease severity
Downy mildew
Foliage
Fruits
Fundamental and applied biological sciences. Psychology
Fungal plant pathogens
Geographical distribution
Golovinomyces
Host range
Infection
Leaves
Pathogens
Phytopathology. Animal pests. Plant and forest protection
Podosphaera xanthii
Powdery mildew
Pseudoperonospora cubensis
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Summary:Cucurbit downy mildew, caused by Pseudoperonospora cubensis, is a major cucumber disease in the Czech Republic. Disease prevalence, host range and disease severity were evaluated from 2001 to 2009. The geographical distribution of P. cubensis was assessed on ca 80–100 locations per year in two main regions of the Czech Republic (central and southern Moravia, and eastern, northern and central Bohemia). Infection by P. cubensis was observed primarily on cucumber (Cucumis sativus) but only on the leaves. During the study, disease prevalence ranged from 66 to 100%. The majority of C. sativus crops were heavily infected at the end of the growing season (second half of August). Generally, P. cubensis was present at high or very high disease severity. The loss of foliage results in the reduction in the quality and quantity of marketable yield of fruit. Pseudoperonospora cubensis was widespread across the whole area of the Czech Republic studied. Very rarely, infection was recorded in muskmelon (Cucumis melo) and Cucurbita moschata. Of other pathogens, the most frequently recorded was the cucurbit powdery mildew (Golovinomyces cichoracearum and Podosphaera xanthii).
ISSN:0931-1785
1439-0434
DOI:10.1111/j.1439-0434.2011.01811.x