On Sat, 23 Jun 2012 08:38:05 +0100, Martin Brown wrote:

They are a complete waste of time and money unless you are an
Organic(TM) freak and subscribe to the all chemicals are bad scam.
Double irony is that burning weeds *will* make dioxins.

You don't burn the plants with a weed burner though you just waft the flame
over them enough to cause a visble change in colour and/or wilt. The heat
damages the cell structure and the top growth dies. Depending on the plant
that may or may not be enough to kill it.

The small gas cannister "walking stick" things are fine for small weeds
between paving or in gravel but not so good for big weeds or large well
vegitated areas.

Glyphosate is considered "safe" though the stronger concentrates have been
removed from retail sale. They are still available from agri merchants etc.
Cheap generic "Weed killer" you get from a shed will have as much water
(cheap) and as little active ingredient (expensive) in it that they think
they can get away with. Look at the lables...

--
Cheers
Dave.