On Sat, 20 Mar 2004 12:41:54 +1100, "Dave" not on your nelly wrote:

An unfortunate mix up over the contents of a spray bottle saw us spray
diluted glyphosphate over our standrad icebergs about a week ago

Many of the buds have turned brown and withered away but there are still
green buds and roses on each bush

Should we prune the damaged sections, all the shoots or leave things as they
are?

Buy new roses. The old ones will not recover. If they did, I would be taking
the weedkiller back for a refund!