#24

Other Pests of Oaks in California

Thomas F. Smith, California Department of Forestry and Fire Protection

Although major invasive insects and diseases have been shown to have profound impacts on oaks in California there are many other pests that do act as stress agents too.  Foliar diseases such as Tubakia and anthracnose, root pathogens such as Phytophthora species, leaf gall insects and cankering fungi can all impact oak growth and survival, particularly during periods of stress such as droughts and extreme heat events.  These minor pests can impact the oak habitats and resources throughout the State.