Brassica

Codes for pest organisms in brassica

Scientific name	English name	Code
Viruses
Cauliflower mosaic virus	Cauliflower mosaic	CaMV
Turnip mosaic virus	Turnip mosaic	TuMV
Bacteria
Pseudomonas syringae pv. maculicola	Peppery leaf spot	Psm
Xanthomonas campestris pv. armoraciae	Leaf spot	Xca
Xanthomonas campestris pv. campestris	Black rot	Xcc
Fungi
Albugo candida	White rust	Ac
Albugo macrospora	White rust	Am
Alternaria brassicae	Black leaf spot	Abe
Alternaria brassicicola	Black leaf spot	Aba
Alternaria japonica	Black spot	Aj
Erysiphe cruciferarum	Powdery mildew	Ec
Fusarium oxysporum f.sp. conglutinans	Yellows	Foc
Mycosphaerella brassicicola	Ring spot	Mb
Leptosphaeria maculans (anamorph: Phoma lingam)	Black leg	Lm
Peronospora parasitica	Downy mildew	Pp
Plasmodiophora brassicae	Clubroot	Pb
Verticillium albo-atrum	Verticillium wilt	Va
Verticillium dahliae	Verticillium wilt	Vd
Verticillium longisporum	Verticillium wilt	Vl
Insects
Brevicoryne brassicae	Cabbage aphid	Bb
Plutella xylostella	Diamond back moth	Px
Thrips tabaci	Thrips	Tt

HR	highly resistant
IR	intermediate resistant

Schedule 2 - Resistance

1. - Terminology and definitions
   
   1. ‘Immunity’ means not subject to attack or infection by a specified pest or pathogen.
   2. ‘Resistance’ is the ability of a plant variety to restrict the growth and development of a specified pest or pathogen and/or the damage they cause when compared to susceptible plant varieties under similar environmental conditions and pest or pathogen pressure. Resistant varieties may exhibit some disease symptoms or damage under heavy pest of pathogen pressure.
      Two levels of resistance are defined:
      
      1. High resistance (HR): plant varieties that highly restrict the growth and development of the
         specified pest or pathogen under normal pest or pathogen pressure when compared to susceptible
         varieties. These plant varieties may, however, exhibit some symptoms or damage under heavy pest
         or pathogen pressure.
      2. Intermediate resistance (IR): plant varieties that restrict the growth and development of the specified pest or pathogen, but may exhibit a greater range of symptoms or damage compared to highly 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 or pathogen pressure.
   3. ‘Susceptibility’ is the inability of a plant variety to restrict the growth and development of a specified pest or pathogen.
      
2. - Information per variety
   Resistances in varieties of our crops will be coded (see coding list at www.enzazaden.com ), unless indicated otherwise. In case a variety is resistant to more than one pathogen, the individual resistance codes will be separated by the symbol ‘/ ‘.
   
   If in a resistance code of a certain variety reference is made to certain strains for which the resistance is claimed this means that no resistance is claimed to other strains of the same pathogen.
   
   If, in a resistance code, no reference is made to strains of the pathogen for which the resistance is claimed, resistance is claimed only to certain not further specified strains of the pathogen and we hereby disclaim any guarantee that the variety will not be infected by the said pathogen.