Well, looks like I have an aphid problem in the trees along my driveway causing a constant 'sap' problem. It's actually what the insect excretes; it's been a problem for a while now, covering my deck, siding, everything! After a while it turns black and can kill smaller plants. Does anyone have any experience getting rid of them? What works, what doesn't. I really need to inject the tree or use something that doesn't have to be sprayed. Solution? Also, need some help with a tree removal guy recommendation. I have two maples that are in the way of progress. -Thanks.