Seedlings will need to be removed before they flower. Part of the roadside has been scalped and soil removed so there could be a new outbreak somewhere.
Mike I went on quite a large email trail around ACT Government workers and the good news is that it appears that soil was not removed from the site, rather you should notice some filling and compaction of some roadside areas within the Long Gully road infected area
Mike I have removed both Cobbler's Peg and Eurphorba davidii from both sides of the road. Would be good if you could walk over the area in next few weeks to get any I missed. We really are getting on top of both species. The Euphorbia hasn't seeded yet so hopefully it will be an even better story next year.