Phytosphere Research

A field guide to insects and diseases of California oaks


image of fiedl guide


Swiecki, T. J.; Bernhardt, E. A.  2006.  A field guide to insects and diseases of California oaks. Gen. Tech. Rep. PSW-GTR-197. Albany, CA: Pacific Southwest Research Station, Forest Service, U.S. Department of Agriculture. 151 p.

This publication will be useful to arborists, plant health professionals, and anyone who cares for California oaks in natural or urbanized settings. It is available both in spiral-bound hard copy format and online as an Adobe Acrobat PDF document. An addendum describing goldspotted oak borer (Sept 2011) is now available online.


Download the PDF at

Addendum - goldspotted oak borer (currently available online only)

Hard copy

The US Forest Service shut down their publication distrbution service in 2015. Currently all hard copies of this free publication reside with UC Cooperative Extension, Marin County. Contact Janice Alexander or Susan Frankel at to obtain copies.