I don't know if you have anyone who can answer this but after years of listening to you on the radio and your tv shows I am thinking with your own expertise you might have the answer! I am trying to KILL, yes that's right, a couple of wild lilac bushes in my back yard, these monsters are sprouting into the neighbours yards as well and must be stopped.
Answer:
Talk to someone at your local nursery and they'll have a solution for you.