Question
I just bought a 6000 sq ft property that I want to build on that has about 25 ficus trees and no other plantlife.  Most trees are 2" in diameter, but appror six have trunks 9-18".  What can I do to kill these as they are taking over my yard and I want to build.  Thank you.

Answer
Cut the trees near ground level and as soon as you cut them paint the stump with a herbicide called Roundup. Use the Roundup undiluted. Get a cheap paint brush and dip the brush in the Roundup and paint the stumps as you cut them. The stump will carry the Roundup down to the root system killing the roots and the trees. Roundup will kill any green plant it gets on so be careful not to drip the Roundup on any plant not wanting to be killed.