ForesTree - A Guide to Tree Health

Pest and Disease Information

  • Arbutus menziesii - Resistant to Oak Root Fungus. Susceptible to Caterpillars, Scales and Thrip, Needle Cast, Sudden Oak Death, Anthracnose, Phytophthora, Root Rot, Hardwood Trunk Rot, Red Fomes Rot, Pitted Sap Rot, Oak Root Rot and Rust. Additional and expanded information listed below.

  • For further tree information:
       SelecTree (175) | Silvics of North America
9 Records Found
Disease or Pest NameDescription of Disease or Pest

Annosus root disease
Heterobasidion annosum

Heterobasidion_annosumSymptoms of Annosus root disease include fading of crowns to light green, thinning crowns, chlorotic foliage, reduced height growth, and ultimately death. Trees affected often occur as small groups. As t...

Apiognomonia veneta

Apiognomonia_venetaAnthracnose affects many hosts, but it is most common on California Sycamore. On California Sycamore kills shoots and causes leaf tissue to die beginning along the veins. Prolonged spring rains and fog m...

Hardwood trunk rot
Phellinus igniarius

Phellinus_igniariusIn hardwood trunk rot the fruiting bodies are perennial, hard, woody, generally hoof shaped and arise from the trunk of the affected tree. The upper surface is deeply zoned, grey-black to black, and the l...

Oak root fungus
Armillaria mellea

Armillaria_melleaArmillaria cases reduced terminal growth and general decline in affected plants, As the Armillaria advances dieback of twigs and branches (most apparent in hardwoods) can occur. Crown symptoms include chl...

Phytophthora Root and Crown Rot
Phytophthora cactorum

phytophthora_cactorumThis disease, as its name implies, is characterized by red-brown exudate oozing from bark fissures in cankers on lower parts of the mainstem of the tree. Wood behind the wet areas is dead and stained reddi...

Phytophthora root disease
Phytophthora cinnamomi

Phytophthora_cinnamomiP. cinnamomi causes a general plant decline. Plants can be killed quickly causing them to retain dead leaves for a long period. Plant symptoms include leaf and twig dieback, bleeding through bark cracks,...

Red fomes rot
Fomitopsis cajanderi

This wood decay forms perennial, woody, bracket-like to hoof shaped conks on the trunk of affected trees. The upper surface is brown to black, cracked and rough. The lower surface has small circular pore...

Sudden Oak Death
Phytophthora ramorum

AerialPhytophthora ramorum causes two types of symptoms on affected plants. In some it causes bleeding cankers on the mainstem with red-brown exudate. Zone lines are present around diseased tissue when bark is ...

White mottled rot
Ganoderma applanatum

Ganoderma_applanatumWhite mottle rot fruiting bodies are perennial, leathery to woody, flat or plate-like. The upper surface is light brown and often covered with brown spores. The lower surface is white turning brown when ...