Amanita phalloides - not in my back yard!

[Jim Berlstein]

Since this is a mycorhizal fungus (symbiotic),
You might consider the extreme measure of killing
the tree, or trees, that the fungus coexists with. If they fruit in a 
circular area around one particular tree, it should not be too hard to 
figure out which tree to kill.  I think they usually associate with 
evergreens in this country, although some amanitias seem to associate 
with different trees in different areas.
The man who ID'd the fungus might know.

Best of luck,

-
  JIM BERLSTEIN  VPGH51A at prodigy.com