and life cycle—Powdery mildew
All powdery mildew fungi require living plant tissue to grow. Most powdery mildew fungi grow as thin
layers of mycelium on the surface of the affected plant part. Spores, which are the primary means of dispersal,
make up the bulk of the powdery growth and are produced in chains that can be seen with a hand lens. Spores
are carried by the wind to new hosts. Spores are killed and germination is inhibited by free moisture.
Moderate temperatures and shady conditions are generally the most favorable for development. Spores are
sensitive to extreme heat and direct sunlight.
of powdery mildew