Colette
ActiveCucurbita pepo L. · Field pumpkin
Enza Zaden Beheer B.V.
NL
4 records
Diseases
Powdery mildew of zucchini
Cucurbita pepo L.
A fungal disease of zucchini caused by obligate biotrophic fungi Podosphaera xanthii and Golovinomyces cichoracearum. It manifests as a white powdery coating on the upper leaf surface, which eventually spreads to all above-ground plant organs.
In the reference 333 varieties crop Field pumpkin, where this is mentioned in the description.
The pathogens Podosphaera xanthii and Golovinomyces cichoracearum can develop either individually or together, forming a mixed infection. Symptoms of the disease begin to appear on the upper surface of the leaves as localized light spots that gradually enlarge, coalesce, and transform into a dense “felty” coating, spreading to petioles and stems. Under conditions of severe infection, plant tissues become chlorotic, toughen, and die.
The development of the pathogens is favored by moderate temperatures in the range of 18–25°C, high air humidity, and dense planting that limits ventilation. Genetic resistance of the crop to the disease is most often polygenic and classified as intermediate. In zucchini breeding, the PMR label is used to indicate the ability of plants to suppress infection development, although specific alphanumeric gene designations are rarely encountered in general practice.
General information about the subject — on the page Powdery mildew.
Varieties of Field pumpkin mentioned in the description
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.
Explorer
ActiveCucurbita pepo L. · Field pumpkin
Gautier Semences SAS (FR)
FR
2 records
Alpha ND
ActiveCucurbita pepo L. · Field pumpkin
Syngenta Crop Protection AG
NL
3 records
Renegade
ActiveCucurbita pepo L. · Field pumpkin
Enza Zaden Beheer B.V.
NL
2 records
Green Tangerine
ActiveCucurbita pepo L. · Field pumpkin
High Mowing Seeds Tom Stearns
NL
3 records
Romina
ActiveCucurbita pepo L. · Field pumpkin
UNITED GENETICS SEEDS CO
PT
4 records
Majestée
ActiveCucurbita pepo L. · Field pumpkin
Gautier Semences SAS (FR)
FR
2 records
Liniac
ActiveCucurbita pepo L. · Field pumpkin
Gautier Semences SAS (FR)
FR
2 records
Velazquez
ActiveCucurbita pepo L. · Field pumpkin
SEMILLAS FITO, S.A.
ES
2 records
Mehiata
TerminatedCucurbita pepo L. · Field pumpkin
HM Clause SA (FR)
FR
2 records
Victoria
ActiveCucurbita pepo L. · Field pumpkin
Clause (FR)
FR
2 records
Centauro
ActiveCucurbita pepo L. · Field pumpkin
Gautier Semences SAS (FR)
FR
2 records
Melodia
ActiveCucurbita pepo L. · Field pumpkin
HM Clause SA (FR)
FR
3 records
Regio
TerminatedCucurbita pepo L. · Field pumpkin
ESASEM SPA
IT
2 records
Vitalic
Application submittedCucurbita pepo L. · Field pumpkin
Gautier Semences SAS (FR)
FR
2 records
Eolo ND
Application submittedCucurbita pepo L. · Field pumpkin
Syngenta Crop Protection AG
NL
3 records
GL Balthasar
ActiveCucurbita pepo L. · Field pumpkin
Saatzucht Gleisdorf
AT
2 records
Zeus ND
ActiveCucurbita pepo L. · Field pumpkin
Syngenta Crop Protection AG
NL
3 records
Setino
ActiveCucurbita pepo L. · Field pumpkin
OLTER SRL
IT
2 records
Raffaello
ActiveCucurbita pepo L. · Field pumpkin
SEMILLAS FITO, S.A.
ES
2 records
Kalimera
ActiveCucurbita pepo L. · Field pumpkin
HM.Clause S.A.S.
FR
3 records
Nimos ND
Application submittedCucurbita pepo L. · Field pumpkin
Syngenta Crop Protection AG
NL
3 records
Icona
ActiveCucurbita pepo L. · Field pumpkin
HM.Clause S.A.S.
FR
3 records
Cyriac
ActiveCucurbita pepo L. · Field pumpkin
Gautier Semences SAS (FR)
FR
2 records