The initial damage shows up as light yellow stippling on the surface of the leaves.
43+ Azalea Yellow Leaves With Black Spots. Bacterial rots often lead to a slimy texture and a foul odor. Black spots on the foliage of the azalea shrub often indicates a pest infestation.
Common Azalea Problems Azalea Diseases Azalea Plant Pests from www.gardeningknowhow.com
Rhododendrons are usually evergreen and keep their leaves throughout the winter. Deciduous azaleas make a dazzling display, particularly in yellows and oranges. Although most people associate azaleas with spring, there are several that bloom in summer and fall.
Some leaved suffer from a black spot / spec (similar to this).
With chlorosis, the leaves don't turn a solid yellow, but rather remain partly green and. Azaleas prefer a sheltered spot in partial shade and need to be grown in a slightly acid soil. How much a disease develops but our major nematode concern for azaleas is the stunt nematode. Although most people associate azaleas with spring, there are several that bloom in summer and fall.
