Technical Abstract: Rhizoctonia solani has been reported to cause damping-off and root rot of rhododendrons and azaleas. Damping-off often includes groups of dying and dead seedlings. Decline of rooted plants in containers results from both root rot and stem necrosis below or above the soil line. Root rot is usually noticed due to the yellowing of leaves, often lower leaves, but also by reduced plant growth. Root rot of both seedlings and larger plants is evident as a complete necrosis of roots and as necrotic lesions on roots. Control should include a combination of sanitation, cultural, and chemical practices. Cultural controls include regulating irrigation frequency to avoid extended saturation of the media and high humidity conditions and not adding high levels of nitrogen. Fungicides from five chemical classes are available for applying a drench treatment to control disease symptom development. Commercial products of biocontrol agents have been shown to reduce Rhizoctonia root rot development.