Question
I Live on a golf course & there is giant Eucaliptus tree that hangs over my pool & they dropping are staining my pool how can i kill this tree with out notice

Answer
Take an axe (hatchet) and cut through the bark into the wood at ground level all the way around the tree. Purchase a herbicide called Roundup and as soon as you make the cut around the tree pour a little Roundup into the cuts. The tree will take the herbicide to the roots and kill the tree.  Unless someone looks at the bas close they should not see the cuts.If you get the roundup on any green vegetation it will kill the plant so be careful that you do not spill it on the grass under the tree. There are other herbicides that will also work but Roundup can be bought at almost any garden type store.