Joseph O'Brien, USDA Forest Service,
Ramorum Blight ; Sudden Oak Death
Phytophthora ramorum

Ramorum Blight ; Sudden Oak Death (Phytophthora ramorum ) is a fungal pathogen of oaks and laurals. It was first detected in California in 1995.

This 'water mold' thrives in moist, mild environs has laid waste to tan oaks in the northwest. Plants from nurseries in quarantine areas must be certified to be free of this disease. Don't move plants or soil to prevent spreading this disease.

Federal Quarantine and Regulated County Map

This fungal pathogen has been identified by USDA-APHIS as a serious threat to US Agriculture and Natural Resources, and surveys have been planned for multiple states.

Visit the Phytophthora ramorum program page for more information about this pest.
Summaries of State Plant Protection Laws and Regulations
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