Azalea Leaf Gall. The unsightly, bulging masses can be found on many parts of the plant including the branch tips, leaves, flower parts, and seed pods. azalea leaf gall Exobasidium rhododendri. 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. Treating 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. Affected leaves eventually turn brown and should be removed and destroyed. Distorted buds. 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. Bookmark the permalink. Caused by a fungus, Exobasidium vaccinii, which is dormant in the developing buds from one year to the next. When bud … azalea leaf gall Exobasidium japonicum. Bulbous growths that eventually brown and harden. Posted in Uncategorized. 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. Some of the native rhododendron species (azaleas) are more susceptible than hybrid rhododendrons. The leaves become curled, fleshy, and pale green to white. Thick, curled leaves. Later a whitish fungus covers the gall, and the gall then slowly turns brown, shrinks and becomes quite hard. camellia leaf gall Exobasidium camelliae. Azalea leaf and flower gall is a disease that causes concern to many home gardeners each year. Source: Selecting and Growing Azaleas Bulletin 670 . Leaf Gall. The leaves become thickened, curled, fleshy and pale green to white in color. Petal Blight – This fungus only affects flowers and appears as pale or whitish spots on colored petals or rust-colored spots on white petals. Pinkster apple gall. camellia leaf gall Exobasidium camelliae. Azalea Leaf Gall. The galls enlarge rapidly, and are at first soft and succulent, typically light green in color. Pale stems. Azalea Gall – This azalea disease commonly occurs in early spring on new leaf growth. 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. 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. About James Morgan James Morgan … Leaves and possibly stems become thickened, curled, fleshy and turn … It is caused by the fungus Exobasidium vaccinii. 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