Diseases
Cucurbita maxima Duchesne
A fungal disease caused by the obligate parasites Podosphaera xanthii and Erysiphe cichoracearum. It manifests as a white powdery coating on plant organs, leading to leaf senescence and reduced productivity.
In the reference 26 varieties crop Giant pumpkin, where this is mentioned in the description.
The pathogens belong to the Erysiphaceae family. The most aggressive and prevalent pathogen for Cucurbita maxima is Podosphaera xanthii, which is often found in combination with Erysiphe cichoracearum. Fungal populations are genetically variable, which accounts for differences in their virulence across different regions.
Initial symptoms present as white or grayish-white mycelial patches on both sides of the leaf blades. As the infection progresses, the spots coalesce, affecting petioles and stems, which causes browning and tissue necrosis. Secondary effects include stunted growth, loss of foliage, sunburn of fruits, and poor fruit development.
Genetic resistance in the crop is more often quantitative and polygenic in nature. In breeding programs for Cucurbita maxima, there are no widely used alphanumeric designations for major resistance genes; therefore, selection is based on screening accessions from germplasm collections and evaluating field tolerance.
General information about the subject — on the page Powdery mildew.
Selection based on the description text, not on official evaluation: these data are absent from registers. For specific variety details, please refer to its profile.
Cucurbita maxima Duchesne · Giant pumpkin
TAKII EUROPE B V
Cucurbita maxima Duchesne · Giant pumpkin
Ralf Kuijpers
Cucurbita maxima Duchesne · Giant pumpkin
Jiri Horal
Cucurbita maxima Duchesne · Giant pumpkin
Wittmann Karl, Dr.
Cucurbita maxima Duchesne · Giant pumpkin
Public domain
Cucurbita maxima Duchesne · Giant pumpkin
Johnny's Selected Seeds
Cucurbita maxima Duchesne · Giant pumpkin
Sakata Seed Corporation (SCC)
Cucurbita maxima Duchesne · Giant pumpkin
TAKII EUROPE B V
Cucurbita maxima Duchesne · Giant pumpkin
Johnny's Selected Seeds
Cucurbita maxima Duchesne · Giant pumpkin
TOKITA Sementi Italia srl
Cucurbita maxima Duchesne · Giant pumpkin
W. LEGUTKO PRZEDSIEBIORSTWO HODOWLANO NASIENNE SP.Z.O.O
Cucurbita maxima Duchesne · Giant pumpkin
Ulrike Behrendt (Oldendorfer Saatzucht)
Cucurbita maxima Duchesne · Giant pumpkin
Mikado Kyowa Seed Co. Ltd. (JP)
Cucurbita maxima Duchesne · Giant pumpkin
Pieterpik B.V.
Cucurbita maxima Duchesne · Giant pumpkin
Cucurbita maxima Duchesne · Giant pumpkin
Cucurbita maxima Duchesne · Giant pumpkin
Cucurbita maxima Duchesne · Giant pumpkin
Cucurbita maxima Duchesne · Giant pumpkin
Cucurbita maxima Duchesne · Giant pumpkin
Cucurbita maxima Duchesne · Giant pumpkin
Lymar Anatolii Ostapovych, Kholodniak Liubov Volodymyrivna, Kholodniak Oleh Heorhiiovych,
Cucurbita maxima Duchesne · Giant pumpkin
HILD SAMEN| Hild Samen GmbH
Cucurbita maxima Duchesne · Giant pumpkin
RIJK ZWAAN Zaadteelt en Zaadhandel B.V.
Cucurbita maxima Duchesne · Giant pumpkin
WIESLAW LEGUTKO