Goldspotted Oak Borer
Goldspotted Oak Borer
Goldspotted Oak Borer
University of California
Goldspotted Oak Borer

Early Warning System (EWS)

With over a million acres of oaks in southern California, it is difficult to monitor all woodlands for new areas of infestation. We are asking woodland owners to help monitor the condition of oaks in their areas and report new cases of oak mortality by providing information to scientists and managers about declining oaks in the region. You can do this by taking part in the Early Warning System (EWS). Follow the "Help Monitor" link below to become part of the Early Warning System.

Help Monitor


Mobile Monitoring

GSOB Trkr iPadiPhone image_640x738x72ppi
Go Mobile and Report!

Two resources have been developed to help with oak mortality and goldspotted oak borer monitoring. The GSOB Tracker mobile application is now available for Apple IOS devices. This application was designed for the novice oak surveyor that has had little to no training on GSOB and other oak pests.


For Android platform devices or for more detailed monitoring, there are online resources available at the Managing Oak Mortality (MOM) website. This site offers general GSOB educational information; GSOB distribution maps with a variety of map views; downloadable map data and a downloadable mobile application.

To access the mapping options, just click on the arrow tab near the upper right hand corner of the home page.

To download the HTML 5 Mobile Application, click the tab in the lower left hand corner of the home page.



Informational meetings and trainings may be scheduled around Southern California. For dates and locations of upcoming events contact the EWS Program Coordinator.

Coordinating Workgroup Organizations:

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This site contains research-based information for education purposes. For specific guidance check with your local land management regulatory authorities. Any information on products and practices is for educational purposes only and does not constitute an endorsement or recommendation by the University of California. 

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