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Default Copper Sulfate effect on Tree

In article .com,
says...

I wonder how the commercial root killer products (copper sulfate) stay
on the market if they wind up killing the whole tree & not just the
roots?


Existing products often escape the scrutiny applied to new products. If
it were invented today, do you think anyone would seriously suggest
selling squeeze bottles of hydrofluoric acid as rust stain remover?


--
is Joshua Putnam
http://www.phred.org/~josh/
Updated Infrared Photography Gallery:
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