Downy mildew of organically grown cucumbers in the greenhouse – differences in susceptibility of varieties?

Authors

  • Peggy Marx Julius Kühn-Institut – Bundesforschungsinstitut für Kulturpflanzen, Institut für Pflanzenschutz in Gartenbau und Forst, Kleinmachnow
  • Ute Gärber Julius Kühn-Institut – Bundesforschungsinstitut für Kulturpflanzen, Institut für Pflanzenschutz in Gartenbau und Forst, Kleinmachnow
  • Eckard Moll Julius Kühn-Institut – Bundesforschungsinstitut für Kulturpflanzen, Zentrale Datenverarbeitung, Kleinmachnow

DOI:

https://doi.org/10.5073/JfK.2011.09.02

Keywords:

Cucumis sativus, cucumber, downy mildew, Pseudoperonospora cubensis, varieties

Abstract

Dowy mildew (Pseudoperonospora cubensis) is one of several diminishing factors of organically grown cucumbers in the greenhouse. Varieties available on the market exhibit different degrees of susceptibility to powdery mildew while little is known about susceptibility to downy mildew.

With the objective to find differences in the degree of susceptibility 20 selected varieties disposable on the market were tested and compared.

The results revealed that all varieties were susceptible, but at several varieties showed a lower severity of the disease. Selecting varieties thus does not constitute a suitable instrument to reduce the infestation with downy mildew to a considerable extent as for their yield. To publish recommendations for growers a lot of work is to be done especially disease severity associated with yield.

 

 

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Published

2011-09-01

Issue

Vol. 63 No. 9 (2011)

Section

Original Article

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