Urban Forest Ecosystems Institute

DISEASE AND PEST LIST FOR:

Tanoak

Lithocarpus densiflorus - Susceptible to Scales, Sudden Oak Death, Oak Root Rot, Phytophthora, Root Rot and Rust. Additional and expanded information listed below.

Disease or Pest Name	Description of Disease or Pest
Leaf Spot Pseudomonas lauraceum	This bacteria causes small angular, black lesions on the leaves.
Oak root fungus Armillaria mellea	Armillaria cases reduced terminal growth and general decline in affected plants, As the Armillaria advanc...
Phytophthora Root and Crown Rot Phytophthora cactorum	This disease, as its name implies, is characterized by red-brown exudate oozing from bark fissures in can...
Phytophthora root disease Phytophthora cinnamomi	P. cinnamomi causes a general plant decline. Plants can be killed quickly causing them to retain dead le...
Sudden Oak Death Phytophthora ramorum	Phytophthora ramorum causes two types of symptoms on affected plants. In some it causes bleeding cankers...
California oakworm Phryganidia californica	California oakworm is an important defoliating pest of ornamental coast live oak. Most years it is of li...