Diseases
Cucumis sativus L.
A group of infectious cucumber diseases including angular leaf spot, corynespora leaf spot, and alternaria leaf spot, which differ in etiology and symptoms. They are characterized by the formation of necrotic spots of various shapes and structures on the leaf blade.
In the reference 244 varieties crop Cucumber, where this is mentioned in the description.
Angular leaf spot is caused by the bacterium Pseudomonas amygdali pv. lachrymans and manifests as vein-delimited spots, which, under high humidity, exude a bacterial ooze that forms a white crust. Genetic resistance to this pathogen is associated with the gBALS4.1 and gBALS6.1 loci, as well as genes involved in salicylic acid metabolism.
Corynespora leaf spot, caused by the fungus Corynespora cassiicola, is characterized by target-like spots with a gray-white center that can coalesce and cause defoliation. Resistance is provided by the cca-3 gene on chromosome 6, which encodes the CC-NB-ARC protein, as well as the Tls5.1 and Tls5.2 QTLs on chromosome 5 and the CsMLO4 protein.
Alternaria leaf spot, caused by fungi of the genus Alternaria, manifests as brown spots with concentric rings and a chlorotic halo. Scab, caused by Cladosporium cucumerinum, primarily affects fruits in the form of water-soaked spots and skin cracking, appearing less frequently on leaves.
General information about the subject — on the page Leaf spot diseases.
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.
Cucumis sativus L. · Cucumber
GAVRISh SERGEJ FEDOROVICh / PORTYaNKIN ALEKSEJ EVGEN'EVICh / ShAMShINA ANNA VYaChESLAVOVNA / ShEVKUNOV VALERIJ NIKOLAEVICh
Cucumis sativus L. · Cucumber
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
Cucumis sativus L. · Cucumber
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
Cucumis sativus L. · Cucumber
Monsanto Vegetable IP Management B.V.
Cucumis sativus L. · Cucumber
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
Cucumis sativus L. · Cucumber
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
Cucumis sativus L. · Cucumber
Uniseeds, NL
Cucumis sativus L. · Cucumber
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
Cucumis sativus L. · Cucumber
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
Cucumis sativus L. · Cucumber
Robert Priieur
Cucumis sativus L. · Cucumber
Harris Moran Seed (US)
Cucumis sativus L. · Cucumber
Instytut Ogrodnictwa - Państwowy Instytut Badawczy
Cucumis sativus L. · Cucumber
Enza Zaden Beheer B.V.
Cucumis sativus L. · Cucumber
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
Cucumis sativus L. · Cucumber
Enza Zaden Beheer B.V.
Cucumis sativus L. · Cucumber
Enza Zaden Beheer B.V.
Cucumis sativus L. · Cucumber
Bayer Holland B.V.
Cucumis sativus L. · Cucumber
INTERSEMILLAS SAU
Cucumis sativus L. · Cucumber
PLANTICO HODOWLA I NASIENNICTWO OGRODNICZE ZIELONKI SP. Z O.O.
Cucumis sativus L. · Cucumber
Enza Zaden Beheer B.V.
Cucumis sativus L. · Cucumber
W. LEGUTKO PRZEDSIEBIORSTWO HODOWLANO NASIENNE SP.Z.O.O
Cucumis sativus L. · Cucumber
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
Cucumis sativus L. · Cucumber
Syngenta Crop Protection AG
Cucumis sativus L. · Cucumber
Enza Zaden Beheer B.V.