California Pest Rating for Phytophthora cambivora (Petri) Buisman 1927 Pest Rating: B PEST RATING PROFILE Initiating Event: None.  The current risk and status of Phytophthora cambivora in California are reassessed and a permanent rating is proposed. History & Status: Background:  Phytophthora cambiv ora is an oomycete pathogen that can cause crown and root rot disease, … Continue reading Phytophthora cambivora (Petri) Buisman 1927 →