I had the same problem and I researched it. An exterminator was going to be expensive so I tried something less harmful. Spray bottle filled with water & a spoon of dish soap. Spray only the roots. Hope it works for you as well☺
Try podocarpus its nice and grow fast. They will get a decease the mades them brown but you just have to trim them and remove the infected branch. I have them as a hedge they have grow 2 feet in les than 6 month's. If you want them to grow fast, you will have to supply them with plenty of water.
Try pleomele reflexa makes a beautiful Hedge for privacy doesn't get disease it's a deep green very Hardy bush or could be trimmed to make a tree
Jatropha Bush..not really considered a tree. When they grow higher then 5ft. they get leggy. I have them in my yard (6). So every few months I trim them. If you don't maintain them they will get diseased.
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