 It has not been recorded from northern Scandinavia, northern and central Siberia, northern China, western and central Africa, Alaska, northern and central Canada, and southern and western South America.This pathogen infects plants in the family Brassicaceae; the growth stages involved include the seedling stage, the growing stage, the flowering stage, and the fruiting stage.It has been recorded on almost all the varieties and species of the rapeseed-mustard group of crops as well as many wild brassicas.