Answer the following question given this paragraph: 

Plant Parasites Protist parasites of terrestrial plants include agents that destroy food crops. The oomycete Plasmopara viticola parasitizes grape plants, causing a disease called downy mildew (Figure 23.33). Grape plants infected with P. viticola appear stunted and have discolored, withered leaves. The spread of downy mildew nearly collapsed the French wine industry in the nineteenth century.


Q: What disease is caused when the oomycete plasmopara viticola parasitizes grape plants?


A:
downy mildew