On Sun, 17 Aug 2003 07:52:55 +0000 (UTC), "Franz Heymann"
wrote:

Remember glyphosate is fairly slow acting (around a week), but when it
kills, it kills dead. Leave the dead weed in situ until it is utterly
dessicated before removing it. In fact, I often don't bother removing the
dead weeds at all.

Be careful with glyphosphate in lawns: stepping on a painted dandelion
and walking across the grass may spread the stuff if it isn't full dry
or absorbed, leading to a track of dead grass in footprint-shaped
patches a week later. Grass is more sensitive to glyphosphate than
some weeds, and I've tracked the stuff from a path into the lawn...

Either work carefully from one side to the other and stay out of the
lawn (it'll say on the bottle how long, six hours or until dry ISTR),
or use a herbicide that won't harm grass, but will kill dandelions.

Thomas Prufer