powdery mildew of zucchini

Powdery mildew of zucchini. Figure 1. Powdery mildew of zucchini.
 Powdery mildew of zucchini. Figure 2. Powdery mildew of zucchini.
Powdery mildew of zucchini. Figure 3. Powdery mildew of zucchini.
Powdery mildew of zucchini. Figure 4. Powdery mildew of zucchini.