Oak twig blight—Cryptocline cinerescens and Discula quercina
Oak twig blight affects primarily coast live oak, but also may occur on other oak species. Leaves and
twigs from the current season's growth turn white or tan and remain on the tree, often in scattered patches
throughout the tree canopy.
Provide trees with adequate cultural control, especially appropriate watering. Do not irrigate native
oaks during the dry season; irrigate during the winter if needed because rainfall has been below normal.
Prune out all infected twigs during dry weather in the summer and fall; make
pruning cuts properly in
tissue below infected twigs. The disease is most severe when pit
scales are present.
Scattered patches of dead leaves on oak
Tanning of leaves on branch