 "Hyaloperonospora Parasitica" has a very wide host range.It can infect garlic mustard, horseradish, cruciferous vegetables, Shepherd's purse, Cheiranthus spp., Cucurbits, purple vein rocket, treacle mustard, wallflower, spurges, candytuft, mustard plants, radish, and sweet alyssum.Although it is not significantly damaging on any one specific plant, the damage of "H. parasitica" can cause major economic losses if not managed properly.