"Soon after the causal agent of SOD was identified in California, the Oregon Department of Agriculture (ODA) applied quarantine regulations that prohibited the movement of host plant material and associated soil into Oregon from infested counties in California. Upon discovery of SOD in Oregon, ODA expanded the quarantine to include those properties in Oregon with confirmed SOD. The area currently under quarantine in Oregon is approximately 9 square miles.
SOD was first discovered in southwest Oregon by an aerial survey in July 2001. The disease occurs at nine sites near the town of Brookings. The sites range in size from 0.5 to 10 acres, and encompass a total area of 40 acres. The primary plant species being killed is tanoak, but rhododendron and evergreen huckleberry also are infected in Oregon."