Definitions for "Downy mildew"
Fungal disease often encouraged by over-watering or lack of air circulation, but many plant varieties are particularly vulnerable (like roses). It can be identified by a whitish downy film on leaves. It will overwinter successfully.
a fungus forming grayish downy patches, usually on the underside of leaves
A common vine disease favoured by warm, humid conditions. It results in unhealthy leaves and shrivelled fruit. May be controlled with the use of Bordeaux mixture.
any of various fungi of the family Peronosporaceae parasitic on e.g. grapes and potatoes and melons