How to Manage Pests

Pests in Gardens and Landscapes

Pest identification and confirmation—Oak branch dieback

Unlike oak twig blight, which causes dead white or tan leaves in scattered patches throughout the canopy, oak branch dieback generally occurs in a whole section of the tree while other parts of the plant appear healthy. Oak twig blight is associated more with wet conditions; oak branch dieback is more prevalent during and after periods of drought. Both diseases may become more prevalent when trees are stressed from environmental conditions.

Symptoms of oak twig blight
Symptoms of oak twig blight

Statewide IPM Program, Agriculture and Natural Resources, University of California
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