Azalea leaf and flower gall

Azalea leaf and flower gall, caused by Exobasidium vaccinii, infects new leaf and flower buds forming swollen galls which may have a white dusting of spores in early infections, later turning brown and hard.

For more information on diagnosis, hosts, and management follow the link to the Online Guide to Plant Disease Control section on this disease. The website has limited function at this time. To find information on this disease on azalea, use the plant search function and type in "A" and "Go". Scroll down to the azalea section.

Partially galled azalea leaf

Photo: Rosetta

More fully formed leaf gall

Photo: Rosetta

Single leaf infection

Photo: Rosetta

More leaf infections

Photo: Rosetta

More pronounced galls

Photo: Rosetta

Healthy leaves near galled leaves

Photo: Rosetta

Fully formed galls

Photo: Rosetta

Partially galled leaves

Photo: Rosetta, OSU

Website editor:
Robin Rosetta