Phytophthora ramorum
Trials of silvicultural methods for treating "P. ramorum" began in Humboldt County in northwest coastal California in 2006. The trials have taken place on a variety of infested properties both private and public and have generally focused on varying levels and kinds of host removal. The largest () and most replicated trials have involved removal of tanoak and bay laurel by chainsaw throughout the infested stand, both with and without subsequent underburning designed to eliminate small seedlings and infested leaf litter. Other treatments included host removal in a modified “shaded fuelbreak” design in which all bay laurel is removed, but not all tanoaks; bay and tanoak removal using herbicides; and removal of bay laurel alone. The results of these treatments are still being monitored, but repeated sampling has so far detected only very small amounts of "P. ramorum" in the soil or on vegetation in the treated sites.
Cladophialophora carrionii
Minor cases of chromoblastomycosis can be resolved by surgery or antifungal medications. Cold therapy (cryosurgery) by applying cool liquid nitrogen onto lesions can be effective if combined with antifungal therapy and chemotherapy. More serious cases must be treated for a prolonged period of time (6 to 12 months) with the antifungals itraconazole and terbinafine. Antifungals have a wide range of effectiveness, curing between 15-80% of cases. However, "C. carrionii" is sensitive to commonly used antifungals so cure rates are higher than seen in chromoblastomycosis infections caused by "Fonsecaea pedrosoi". Treatments less effective if the infection is chronic, resulting in high relapse rates.