More on SOD:
It has been found that the Calif. Rose, Rosa gymnocarpa, or
CA wood rose, a native rose found in the wild and sold as
a garden plant, is a host for SOD.
To read more about SOD, go to
there are links to other sources such as CDFA (CA Dept of Food & Agri)
APHIS and UC Davis
(You could spend all day reading all that info!!)