Great Central valley

Anthracnose. Joseph OBrien, USDA Forest Service, Bugwood.org
Ambrosia beetle, Rachel Osborn, Southeast Asian Ambrosia Beetle ID, USDA APHIS PPQ, Bugwood.org
Golden oak scale. John .A. Davidson, Uni
Hypoxylon, USDA Forest Service - Region 8 - Southern , USDA Forest Service, Bugwood.org
Ganoderma Root Rot, Theodor D. Leininger, USDA Forest Service, Bugwood.org

This subregion, which runs down the center of the state, has been heavily altered from grassland, riparian, and oak woodland habitat to agricultural uses. It historically featured extensive riparian hardwood and valley oak stands.

Typical insect and disease problems
• Sycamore and oak anthracnose
• True leafy mistletoe
• Armillaria
• Oak pit scale
• Oak twig girdler
• Ambrosia beetles
• Inonotus spp.
• Hypoxylon
• Ganoderma root rot
• Phyophthora cinnamomi