Red needle cast disease, caused by Phytophthora pluvialis, has had a significant impact on radiata pine plantations in New Zealand for over a decade. The LeBoldus Lab at OSU and the Grunwald lab at the USDA-ARS in Corvallis, Oregon collaborated with forest pathologists at Scion, New Zealand’s crown research institute, to demonstrate that the pathogen causing red needle cast disease was likely introduced to that country from the PNW of the United States. This pathogen exists as a needle cast disease of Douglas-fir in the coast range of Oregon and Washington.