Powdery Mildew (fungus – Erysiphe lagerstroemiae): Powdery mildew is very common on crapemyrtle. It is particularly active in the spring and fall months. White-to-grayish moldy growth develops on leaves and new shoots. Dust or spray with a recommended fungicide at first appearance of mildew. Dallas red is an old variety with good mildew resistance. Check on availability of newer varieties with mildew resistance.
Leaf Spots (fungi – Cercospora spp., Phyllosticta spp.): Leaf spot fungi seldom cause severe damage. If needed, apply a recommended fungicide.
Cotton Root Rot: (See the section on Cotton Root Rot)
Mushroom Root Rot: See section on (See the section on Mushroom Root Rot)