If you want to learn more about the phytopthera species, including SOD here is my source at Oregon State. You will find it mostly talks about root rots but it also helps define how nursery stock can get infected. IF I were as clever at the computer as the rest of you, I would be able to make this just a click away. Oh well. Copy and paste works too............
http://plant-disease.ippc.orst.edu/...fm?article_id=4
Interesting yet serious.
Moni