In article ,
Mike Buckler wrote:

From research on the web it looks like Copper Sulphate or the herbicide
"dichlobenil" (2,6-dichlorobenzonitrile) are commonly used for killing roots
in
pipes without killing the rest of the tree.

Does anyone know if either of these are allowed in Australia (Perth)?

No idea, but your sewerage authority probably has some advice on this one.

--
Chookie -- Sydney, Australia
(Replace "foulspambegone" with "optushome" to reply)

"Life is like a cigarette -- smoke it to the butt." -- Harvie Krumpet