I was just doing some reading on this. Here are significant items to consider and that match the problem:
- infects a broad range of plant material including maple species.
- Spread by insects that suck on sap of plants, like leaf hoppers etc. The bacteria is present in the gut of the insect once infected so it can infect many plants.
- The disease is not spread by proximity, or contact as it resides in the xylem, not on the leaf surface.
- Stress is a factor in showing symptoms, but lack of stress (e.g. ground growing) will not cure the plant, but only allow it to grow despite the infection.
I would surmise that It is very likely that bonsai culture, particularly cutting of infected tissue and then cutting of an uninfected plant, would spread the bacteria.
Of particular interest is the following:
"No cultivable X. fastidiosa was recovered from any of the media, buffers or
xylem sap after 24 hours at -10˚C" (From http://iv.ucdavis.edu/files/108872.pdf )
I found reference to A. buergeranum being hardy to USDA zone 4a, with low temperatures of approximately -30˚C. Therefore, I am considering a mid-winter dunk into a freezer for an infected trident to see if it cures the tree.
@Dylan_Ferreira : It seems optimistic to rely on fungicides, particularly since this appears to be a bacterial problem. Do you know of a xylem bacterial treatment? If we can take penicillin, there should be some way to get a plant to uptake an anti-bacterial agent, right?
John Kirby recommended that I try ZeroTol or Cleary 3336. Unfortunately, I've only been able to find them in very large packages....2.5 gallons of ZeroTol for $150
Also of note regarding this problem: I have 2 cotoneasters that may be exhibiting symptoms.