Cucumber Disease Resistance Abbreviation Guide


Definitions

(as outlined by the International Seed Federation)

Susceptibility is the inability of a plant variety to restrict the growth and development of a specified pest.

Resistance is the ability of a plant variety to restrict the growth and development of a specified pest and/or the damage they cause when compared to susceptible plant varieties under similar environmental conditions and pest pressure.

Resistant varieties may exhibit some disease symptoms or damage under heavy pest pressure. Two levels of resistance are defined.

High resistance (HR): plant varieties that highly restrict the growth and development of the specified pest under normal pest pressure when compared to susceptible varieties. These plant varieties may, however, exhibit some symptoms or damage under heavy pest pressure.

Intermediate resistance (IR): plant varieties that restrict the growth and development of the specified pest but may exhibit a greater range of symptoms or damage compared to high resistant varieties. Intermediately resistant plant varieties will still show less severe symptoms or damage than susceptible plant varieties when grown under similar environmental conditions and/or pest pressure.

Resistance Coding is based on Pathogen Codes of the International Seed Federation.

CUCUMBER

         
PATHOGEN: SCIENTIFIC NAME
ENGLISH COMMON NAME
CODE
RACES / STRAINS
RESISTANCE LEVEL
CODES (US / CANADA)
VIRUS

 

       
Cucumber Green Mottle Mosaic Virus Cucumber green mottle CGMMV   IR CGMMV
Cucumber Mosaic Virus Cucumber mosaic CMV   HR / IR CMV
Cucumber Vein Yellowing Virus Cucumber vein yellowing CVYV   HR / IR CVYV
FUNGI

 

       
Corynespora cassiicola Corynespora blight and target spot Cca   HR / IR Cca
Cladosporium cucumerinum
Scab Ccu   HR Ccu
Podosphaera xanthii Powdery mildew Px   HR / IR Px



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