Oak Leaf Blister
Gail Ruhl, Sr. Plant Disease Diagnostician,
Department of Botany & Plant Pathology, Purdue University
Oak leaf blister, caused by the fungus Taphrina
been observed in Indiana on several different species of oaks .
occur as buds swell and open during wet, spring conditions. Leaf
symptoms usually appear within several weeks following infection
inch circular, light green bulges on the top surface of leaves.
underside, the affected areas are sunken or depressed. These distortions
may cause leaf bending or curling of narrow-leaved oak species.
blisters age, they become dry, brown spots; severely diseased leaves
drop prematurely. This disease does not seriously harm healthy
control with fungicides is not usually recommended.
The information given herein
is supplied with the understanding that no discrimination is
intended and no endorsement by the Purdue University Cooperative
Extension Service is implied. Any person using products listed
assumes full responsibility for their use in accordance with
current direction of the manufacturer. Purdue University is an
equal opportunity/equal access institution.
Information listed is valid
only for the state of Indiana