Ramorum Leaf Blight and Shoot Dieback

Infected leaves develop dark, water-soaked lesions with defined margins. When lesion dry out they turn brown and brittle and may distort thinner leaves, caused by Phytophthora ramorum"filthy five\" genera are inc.

Management efforts in Pacific Northwest nurseries are focused on preventing new introductions, new infections, and eradicating the pathogen where it is found. Early detection is vital to preventing disease spread.