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Title: Sudden Oak Death - Eastern (Pest Alert)

Author: O'Brien, Joseph; Mielke, Manfred; Oak, Steve; Moltzan, Bruce;

Date: 2002

Source: NA-PR-02-02. Newtown Square, PA:U.S. Dept. of Agriculture, Forest Service, Northern Area State & Private Forestry

Publication Series: Program Aid

Description: A phenomenon known as Sudden Oak Death was first reported in 1995 in central coastal California. Since then, tens of thousands of tanoaks (Lithocarpus densiflorus), coast live oaks (Quercus agrifolia), and California black oaks (Quercus kelloggii) have been killed by a newly identified fungus, Phytophthora ramorum. On these hosts, the fungus causes a bleeding canker on the stem. The pathogen also infects Rhododendron spp., huckleberry (Vaccinium ovatum), bay laurel (Umbellularia californica), madrone (Arbutus menziesii), bigleaf maple (Acer macrophyllum), manzanita (Arctostaphylos manzanita), and California buckeye (Aesculus californica). On these hosts the fungus causes leaf spot and twig dieback.

Keywords: NA-PR-02-02, Cankers, crown dieback, mortality, sod, tanoaks, oak fungus, Phytophthora ramorum, California black oaks, bleeding canker, bay laurel, twig dieback

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Citation:


O''Brien, Joseph G.; Mielke, Manfred E.; Oak, Steve; Moltzan, Bruce 2002. Sudden Oak Death - Eastern (Pest Alert). NA-PR-02-02. Newtown Square, PA:U.S. Dept. of Agriculture, Forest Service, Northern Area State & Private Forestry

 


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