powdery mildew of cantaloupe

Figure 1. Colonies of powdery mildew are visible on the upper surface of this cantaloupe leaf. Figure 1. Colonies of powdery mildew are visible on the upper surface of this cantaloupe leaf.
Figure 2. Sporulation of the powdery mildew fungus is visible on the lower surface of a cantaloupe leaf. Figure 2. Sporulation of the powdery mildew fungus is visible on the lower surface of a cantaloupe leaf.