Intertaxon relationships
species
Rape
Brassica napus L.
Alternaria brassicae (Berk.) Sacc. - Alternatia Leaf Spot of Cabage 
Alternaria brassicicola (Schwein.) Wiltschire - Alternatia Leaf Spot of Cabage
Botrytis cinerea Pers. - Grey Mould
Hyaloperonospora brassicae (Gäum.) Göker, Voglmayr, Riethm., Weiss & Oberw.
Melanobaris quadraticollis (Boheman, 1836)
consumer (larval stage only)
Delia radicum (Linnaeus, 1758) - Cabbage Magot