"Martin Brown" wrote in message
...

Best bet is use glyphosate slightly over diluted to give it time to act
deeper underground. Just be careful not to hit green plant material of
shrubs you like. And if you do then cut off the affected bit(s).

It is usually not necessary to cut off a piece of the plant that has been
sprayed by mistake. Without delay the affected bit should be washed with
plenty of water.

--

Jeff