Fig. 1a. Symptoms of infection by Phytophthora ramorum on various hosts in California forests: (A) Lithocarpus densiflora with phloem canker on main trunk; (B) Stem canker on L. densiflora stops at the soil line; (C) Arbutus menziesii with foliar and stem lesions; (D) Umbellularia californica with leaf tip necrosis; (E) Acer macrophyllum with marginal leaf scorch; (F) Rhododendron sp. showing branch dieback and foliar lesions; (G) Sequoia sempervirens with needle necrosis on understory sapling; (H) Pseudotsuga menziesii with tip wilting due to branch cankers.
Bay Laurel and Native Plants other than Oaks are the Main Hosts for the Sudden Oak Death Pathogen, P. ramorum, in California
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