Skip to Main Content
U.S. Forest Service
Caring for the land and serving people

United States Department of Agriculture

Home > Search > Publication Information

  1. Share via EmailShare on FacebookShare on LinkedInShare on Twitter
    Dislike this pubLike this pub
    Author(s): Tedmund J. Swiecki; Elizabeth A. Bernhardt
    Date: 2020
    Source: Proceedings of the seventh sudden oak death science and management symposium: healthy plants in a world with <em>Phytophthora</em>. Gen. Tech. Rep. PSW-GTR-268
    Publication Series: General Technical Report (GTR)
    Station: Pacific Southwest Research Station
    PDF: Download Publication  (420.0 KB)


    Sudden oak death (SOD), caused by Phytophthora ramorum, was first diagnosed as the cause of a lethal canker disease of coast live oak (Quercus agrifolia), California black oak (Q. kelloggii), and tanoak (Notholithocarpus densiflorus) in 2000. Between 2005 and 2009, we initiated multiple field studies to test strategies for reducing SOD impacts in stands of tanoak and susceptible oaks. In oak forests, California bay laurel (Umbellularia californica) is the primary source of P. ramorum inoculum that infects oaks, and proximity to bay greatly increases disease risk (Swiecki and Bernhardt 2008). We evaluated the effectiveness of removing California bay, either on an area-wide basis or locally around individual oaks, on the development and progress of SOD in coast live oak, Shreve oak (Q. parvula var. shrevei), and canyon live oak (Q. chrysolepis).

    Publication Notes

    • You may send email to to request a hard copy of this publication.
    • (Please specify exactly which publication you are requesting and your mailing address.)
    • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.


    Swiecki, Tedmund J.; Bernhardt, Elizabeth A. 2020. Long-term performance of sudden oak death management treatments in northern California locations. In: Frankel, Susan J.; Alexander, Janice M., tech. cords. Proceedings of the seventh sudden oak death science and management symposium: healthy plants in a world with Phytophthora. Gen. Tech. Rep. PSW-GTR-268. Albany, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station: 14-18.

    Related Search

    XML: View XML
Show More
Show Fewer
Jump to Top of Page