You may see a spongy growth on your azalea and camellia leaves. This is a leaf gall caused by Exobasidium. This fungus, while very showy, does only minor cosmetic damage to the leaves. Initially, you may see small raised areas on the leaf then as the disease progresses the leaf swells and becomes very spongy. Finally the leaf will deteriorate and develop into a small white fuzzy (fungal mycelia) ball and fall off the paint.
Fungicide applications are not very effective on this disease and are really not needed, but you can pick off the infected leaves and discard them if they are bothering you and making the plant unsightly.
