White powdery fungal growth on the leaf surface. Unlike most fungal diseases which are most common in wet weather, powdery mildew is particularly active in the spring and fall during cool, dry conditions. This fungus spreads rapidly since complete life cycle can occur in 72 hours. Causes leaves, buds and twigs to be distorted and dwarfed.
New growth is particularly susceptible.
Contact the Agricultural Extension Office for a list of resistant plants for your yard. Choose mildew-resistant crape myrtle varieties. Allow space for good air circulation when planting. Remove extremely susceptible plants. Avoid applying the more toxic fungicides.