Spurred on by two rainy years, the spread of sudden oak death in Marin and 18 California counties is back on the rise — this time with an aggressive new strain invading the Bay Area. Until recently, ...

Lab analysis confirmed the presence of the Phytophthora now known to cause Sudden Oak Death.The disease has killed tens of thousands of trees in other, more heavily infested counties, but relatively ...

Sudden Oak Death, a plant disease that has killed more than 50 million trees since appearing on the West Coast more than two decades ago, is increasing in frequency in Napa County and has turned up in ...

A microbial pathogen is causing big trouble in Oregon’s southwest coastal forests. Trouble is brewing in Oregon's southwest coastal forests. Sudden Oak Death is caused by a pathogen that targets ...