The galls enlarge rapidly, and are at first soft and succulent, typically light green in color. Source: Selecting and Growing Azaleas Bulletin 670 . In April and May leaves and buds of infected plants develop distorted growth. Bulbous growths that eventually brown and harden. When bud … Bookmark the permalink. Leaves and possibly stems become thickened, curled, fleshy and turn … Pinkster apple gall. Pale stems. camellia leaf gall Exobasidium camelliae. Caused by a fungus, Exobasidium vaccinii, which is dormant in the developing buds from one year to the next. The leaves become thickened, curled, fleshy and pale green to white in color. Also known as Exobasidium vaccinia and appearing similar to something out of a sci-fi film, the tumor-like disease is known to take hold early spring. The unsightly, bulging masses can be found on many parts of the plant including the branch tips, leaves, flower parts, and seed pods. As shown by some pictures here, the galls range from small thickenings on leaves to large irregular to round galls up to 2″ in diameter, extending beyond the leaves and flower buds. Azalea leaf and flower gall is a disease that causes concern to many home gardeners each year. Posted in Uncategorized. Fungicides are generally not needed or recommended for control of this disease. Azalea leaf gall is a very common and widespread fungus disease that occurs in early spring on new azalea foliage. Fortunately, this disease is more alarming than damaging. It is caused by the fungus Exobasidium vaccinii. Treating Azalea Leaf Gall. Thick, curled leaves. Petal Blight – This fungus only affects flowers and appears as pale or whitish spots on colored petals or rust-colored spots on white petals. Azalea Gall – This azalea disease commonly occurs in early spring on new leaf growth. Azalea Gall Exobasidium vaccinii Printable PDF Click on images to see larger view Exobasidium vaccinii is a common fungal disease that produces galls on members of the Ericaceae family and affects a variety of host plants in a number of different ways. Leaf gall (Exobasidium vaccinii) is a very common fungal disease in the early spring on azaleas and occasionally on rhododendrons. About James Morgan James Morgan … azalea leaf gall Exobasidium rhododendri. Distorted buds. The leaves become curled, fleshy, and pale green to white. Some of the native rhododendron species (azaleas) are more susceptible than hybrid rhododendrons. camellia leaf gall Exobasidium camelliae. Affected leaves eventually turn brown and should be removed and destroyed. In home landscape plantings, the disease is more alarming than damaging, but in greenhouse plants grown under very humid conditions, galls may become so abundant that they cause considerable harm if control measures are not implemented. Later a whitish fungus covers the gall, and the gall then slowly turns brown, shrinks and becomes quite hard. Description. Signs of Azalea Leaf Gall. Azalea leaf gall can be prevented in subsequent years by removing the galls by hand as soon as they are detected and destroying them before they turn white and release spores. Azalea Leaf Gall. azalea leaf gall Exobasidium japonicum. Leaf Gall. Azalea Leaf Gall. Gall: Usually on azaleas, the leaves become very pale, swollen and distorted, then covered in a bloom of white fungus spores; Leaf spots: Purple or brown, more or less round spots appear on the upper leaf surfaces, usually of evergreen species.