Why does your Rhododendron canescens have white powder? Diagnose the cause and fix it with our step-by-step guide.
This fungal disease is highly common in Oakleaf Azaleas, especially when humidity is high or airflow is restricted around the foliage. The white mycelium covers leaf surfaces, eventually leading to chlorosis and leaf drop.
Small, white, waxy insects known as mealybugs cling to the stems and undersides of leaves, secreting a white, cottony substance. They feed on plant sap, which can weaken the shrub and cause leaf yellowing.
Certain species of scale produce a white, powdery, or waxy secretion as they mature and protect themselves. While often more brownish, young infestations can appear as light-colored patches on the stems.
Your plant might also be experiencing one of these issues:
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