Falscher Mehltau an Gurke - Regulierung durch gezielte Klimaführung und Sortenwahl im Unterglasanbau

Summary in the original language of the document

Pseudoperonospora cubensis (downy mildew) is an aggressive fungal pathogen of
cucumber. In 2007, glasshouse experiments with organically grown cucumber
(´Airbus`, ´Juliandra`) were performed to investigate the effects of a climate strategy
“conventional” versus “dehumidified” on the development of the downy mildew
epidemic. In both climate strategies the commanding variable for ventilation is the
temperature; in the strategy “conventional” the established set point for ventilation is
22 °C, whereas in the climate strategy “dehumidified” the set point for ventilation
varies from 18 °C to 23.5 °C, depending on the humidity. The results show that the
climate “dehumidified” lowers the occurrence of downy mildew significantly.