Hi All

How can I get rid of a couple of pufball fungi that are pushing up tarmac on my
driveway? I have had them growing at the edge of the lawn before and have just
dig them out. They are grey and quite hard at first but later if one is mowed
off (not having noticed it) there is a cloud of brown spores. I have pulled off
a lump of raised tarmac and the thing is there. Can I pour some sort of killer
concoction onto it and if so what please?

Phil