FWIW, my DS was chucking out his turpentine and linseed oil (he
paints...) on the front path (ancient sandstone blocks with soil in the
cracks and *lots* of grass and weeds growing there). *All* the weeds
died and took forever to come back again! I don't know whether it was
the turps, the linseed oil or the mixture of both, but it sure worked a
treat!

This would have been applied at the rate of an eggcupful per linear
metre of beweeded path...

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Trish {|:-} Newcastle, NSW, Australia