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Diseases

Cucumber Scab

Cucumis sativus L.

A fungal disease of cucumber caused by Cladosporium cucumerinum, manifesting as olive-colored leaf spots and fruit lesions. The crop's resistance to the pathogen is controlled by a dominant monogenic trait designated as the Ccu gene.

In the reference 568 varieties crop Cucumber, where this is mentioned in the description.

The causal agent of the disease is the fungus Cladosporium cucumerinum Ellis et Arth., belonging to the class Dothideomycetes. The infection affects all above-ground plant organs, including stems, petioles, leaves, and fruits. On young cucumbers, the disease manifests as small watery spots that turn into deep brown lesions, from which gum may exude, causing deformation and growth cessation of the fruits.

On leaf blades, angular spots form with an olive-gray hue and a yellow halo, on the underside of which, under high humidity, a characteristic velvety olive-black coating of conidial sporulation develops. Damage to stems and petioles by dry lesions leads to nutrient disruption and subsequent plant wilting.

In breeding practice, cucumber resistance to olive leaf spot is transmitted as a dominant monogenic trait. This resistance gene is identified by the symbol Ccu, which is used when describing breeding hybrids and cultivars of the crop.

General information about the subject — on the page Leaf mold (brown leaf spot).

Sources8

Varieties of Cucumber 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.

Tribuno

Active

Cucumis sativus L. · Cucumber

Syngenta Seeds B.V.

NL
2 records

Tamega

Active

Cucumis sativus L. · Cucumber

Bejo Zaden B.V.

NL
3 records

Tejo

Active

Cucumis sativus L. · Cucumber

SEMILLAS FITO, S.A.

ES
2 records

Telmo

Active

Cucumis sativus L. · Cucumber

SEMILLAS FITO, S.A.

ES
2 records

Teslin

Active

Cucumis sativus L. · Cucumber

SAKATA VEGETABLES EUROPE SAS

ES
2 records

TANGO

Active

Cucumis sativus L. · Cucumber

ShELOBODKIN ALEKSEJ VLADIMIROVICh

HR
2 records

Cucumis sativus L. · Cucumber

Rijk Zwaan Zaadteelt en Zaadhandel B.V.

NL
2 records

SV3327CT

Terminated

Cucumis sativus L. · Cucumber

Monsanto Vegetable IP Management B.V.

NL
4 records

Stockeu

Terminated

Cucumis sativus L. · Cucumber

Rijk Zwaan Zaadteelt en Zaadhandel B.V.

NL
4 records

Cucumis sativus L. · Cucumber

Rijk Zwaan Zaadteelt en Zaadhandel B.V.

NL
2 records

Smyk

Active

Cucumis sativus L. · Cucumber

W. LEGUTKO PRZEDSIEBIORSTWO HODOWLANO NASIENNE SP.Z.O.O

PL
2 records

Cucumis sativus L. · Cucumber

Przedsiebiorstwo Nasiennictwa Ogrodniczego i Szkolkarstwa w Ozarowie Mazowieckim Spolka z o.o.

PL
2 records

Skyfin

Terminated

Cucumis sativus L. · Cucumber

Rijk Zwaan Zaadteelt en Zaadhandel B.V.

NL
2 records

Skukuza

Active

Cucumis sativus L. · Cucumber

Enza Zaden Beheer B.V.

NL
2 records

Siriana

Active

Cucumis sativus L. · Cucumber

Syngenta Crop Protection AG

NL
4 records

Cucumis sativus L. · Cucumber

Enza Zaden Beheer B.V.

NL
2 records

Solero

Active

Cucumis sativus L. · Cucumber

SEMILLAS FITO, S.A.

ES
2 records

Seculare

Active

Cucumis sativus L. · Cucumber

Nunhems B.V.

NL
4 records

Ramezz

Active

Cucumis sativus L. · Cucumber

Bayer Holland B.V.

NL
4 records

Randall

Active

Cucumis sativus L. · Cucumber

Syngenta Crop Protection AG

NL
4 records

Quirine

Active

Cucumis sativus L. · Cucumber

Rijk Zwaan Zaadteelt en Zaadhandel B.V.

NL
3 records

Qwerty

Active

Cucumis sativus L. · Cucumber

Rijk Zwaan Zaadteelt en Zaadhandel B.V.

NL
2 records

Reehan

Active

Cucumis sativus L. · Cucumber

Rijk Zwaan Zaadteelt en Zaadhandel B.V.

NL
2 records

Prinseya

Terminated

Cucumis sativus L. · Cucumber

Enza Zaden Beheer B.V.

NL
2 records

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