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  • Dead and dying coffeeberry (Frangula californica) shrubs are clearly visible in a failing restoration in a coastal scrub site in San Mateo County, dominated by shrubs with occasional small groups of trees. Phytophthora crassamura and P. megasperma were both isolated directly from symptomatic tissue and from the rhizosphere (i.e. soil and fine roots) of diseased plants. Photo by Laura Sims.
    Phytophthora invasions linked to ecological restorations

    Mar 22, 2021

    • Environment
  • Matteo Garbelotto examines bay laurel for sudden oak death symptoms at the UC Berkeley campus.
    Citizen science SOD Blitz starts April 11 with new COVID-19 safety measures

    Apr 3, 2020

    • Environment
  • Dead tanoaks surrounded by Douglas firs in Humboldt County. Sudden oak death threatens survival of several tree species. Photo by Yana Valachovic
    Volunteers needed to stop SOD from killing oak trees

    Mar 9, 2020

  • ANR in the news November 1-15

    Nov 30, 2019

  • UCCE specialist Matteo Garbelotto refers to a resource provided to citizen science volunteers who participate in the 2019 SOD Blitz. More than 400 participants helped gather data this year. (Photo: Jim Block)
    2019 SODBlitz shows Sudden Oak Death on the rise in California

    Nov 14, 2019

    • Environment
  • Sudden oak death bark sampling. (Photo: Evett Kilmartin)
    2020 may see increased number of trees suffering 'sudden oak death'

    Jun 4, 2019

    • Environment
  • Dead tanoak trees within a Humboldt County forest. (Photo: Suddenoakdeath.org)
    Sudden oak death bioblitz to help stem the spread of disease

    Apr 24, 2019

    • Environment
  • Google map shows results of the SOD blitzes available online at sodblitz.organd SODMAP.org. Green icons identify trees sampled that tested negative for SOD. Red icons were SOD-infected trees.
    Dry conditions keep sudden oak death in check, yet significant outbreaks continue

    Oct 9, 2018

    • Environment
    • Natural Resources
  • The most reliable early symptom of sudden oak death is dark sap exuding from trunk base, as on this coast live oak. (Photo: UC IPM)
    High interest in SOD spread to San Luis Obispo County

    Nov 18, 2016

  • These bay laurel leaves show P. ramorum symptoms.
    Sudden oak death moving to urban areas; 3 steps to protect oaks

    Sep 25, 2015

  • Humboldt County tanoak trees that have succumbed to sudden oak death.
    Sudden oak death still a threat and still spreading

    Jun 19, 2015

  • Sudden oak death symptoms are shown here on Grand fir. Photo by Gary Chastagner.
    Recycling Christmas trees helps curb the spread of pests

    Dec 19, 2014

  • A coast live oak killed by sudden oak death. (Photo: Bruce Hagen)
    Drought is slowing the spread of sudden oak death

    Sep 25, 2014

  • Cleaning boots after a hiking trip helps prevent the spread of sudden oak death.
    Sudden oak death continues to spread in California

    Dec 16, 2013

  • Fire consumes a once-healthy California redwood tree. (photo: USFS)
    Coast redwoods increasingly susceptible to fire damage

    Sep 4, 2013

  • An image from the Oak Mapper website (oakmapper.org) where citizen-submitted scientific data is collected.
    Citizen scientists being mobilized in Sonoma County

    May 15, 2013

  • In this cross-section of a coast live oak killed by sudden oak death, the black-stained tunnels of adult ambrosia beetles can be seen extending into the wood.
    Citizen scientists map Sudden Oak Death

    Apr 15, 2013

  • A cross-section of an oak infested by the goldspotted oak borer shows the damage done by the non-native beetle.
    Don’t move firewood and pests

    Oct 29, 2012

  • An dramatic increase in sudden oak death incidence it believed to be tied to recent weather patterns.
    Sudden oak death expands in San Francisco Bay Area

    Oct 10, 2012

  • From left: Mark Rodgers, Julie Lydick, Pete Angwin, Rizzo, Valachovic, Phil Cannon, Ed Burton, Stephen Smith, Jack Marshall, Chris Nota and Russ Henly
    Community effort beats back sudden oak death in Humboldt County

    May 30, 2012

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