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  • Matteo Garbelotto
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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
  • Ph.D. student Mike Johnson uses Evalutree to assess the health and economic value of oak woodlands.
    New mobile app identifies hazardous trees for public safety

    Jul 21, 2020

  • 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

  • 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
  • The exotic soilborne Phytopthora cinnamomi was introduced in the Ione area of the Sierra Nevada foothills, where it is literally wiping out two native manzanita species. This picture shows how vehicles spread the pathogen along roads and tracks by kicking up infected soil, killing nearby manzanita. (Photo: Matteo Garbelotto)
    Is habitat restoration actually killing plants in California wildlands?

    Jan 4, 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
  • These bay laurel leaves show P. ramorum symptoms.
    Sudden oak death moving to urban areas; 3 steps to protect oaks

    Sep 25, 2015

  • 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

  • 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

  • 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

  • Chefs from area restaurants prepared a six-course dinner with ingredients grown in the Carmelitos garden for an October fundraiser.
    Long Beach garden continues to flourish

    Nov 10, 2011

  • Dramatic increase in Northern California Sudden Oak Death.
    UC Berkeley scientist surprised by SOD incidence

    Oct 3, 2011

  • Wild golden chanterelle mushrooms. (Photo: Wikimedia Commons)
    Mushroom collecting impacted by sudden oak death

    Apr 28, 2011

  • Camellia leaf infected with the pathogen that causes Sudden Oak Death.
    Sudden Oak Death appears in San Francisco's Presidio

    Mar 31, 2011

  • Discoloration characteristic of infection by Phytophthora ramorum, which causes SOD.
    Berkeley lab tracks Sudden Oak Death with citizen help

    Oct 6, 2010

  • A Big Sur tan oak that succumbed to sudden oak death.
    Volunteers battle Sudden Oak Death

    Apr 16, 2010

  • California bay laurel leaves and flowers.
    Saving the forest by cutting down trees

    Dec 18, 2009

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