Warning: The information in this archived item was not confirmed with the appropriate National Plant Protection Organization and is provided solely for informational purposes. Please use this information with caution.

Subject: New hosts for sudden oak death pathogen
Date posted: May 25, 2001
Source: University of California Cooperative Extension in Marin County
Phytophthora sp., the pathogen responsible for sudden oak death, has been found in five new host plants. Bay laurel (Umbellularia californica), madrone (Arbutus menziesii), manzanita (Arctostaphylos spp.), toyon (Heteromeles arbutifolia), and arrowwood (Viburnum recognitum, reported as a host in Germany only) have all been recently reported as hosts, although not all of these plants die following infection. As of May 8, 2001, sudden oak death infection has been confirmed in seven central California coastal counties: Napa, Sonoma, Marin, San Mateo, Santa Cruz, Monterey and Santa Clara.