Polito: the fugal infection that I have had in my plants is systemic thru the entire plant, and is not limited to the roots. In fact, it is the wilting of the leaves that is the first sign of the problem. In my reading, fusarium certainly has been described as infecting the entire plant. I will work tonight on getting some pictures loaded up on pbase of the wilted leaves.
Kevin: I think the mottling I have seen on Catt leaves very well may be a local fungal type that may be dependent on local conditions for its presence. Here is an example of the mottling.
http://www.pbase.com/schnitz/image/57062947