I have a relatively large tulip tree in the front yard of my home, and ever since the spring of this year , the tree rains sap or something every day. If we park a vehicle near the drip line, it will be covered with the sticky fine drips within a few hours. The flies and wasps love the area. At end of summer, the ground looked like it was moving with so many flies on the ground. It is really getting to be a major nuisance, and asking if this is normal or not, anything I can do, etc. We live in southwest Missouri, and also the tree does have quite a few small dead branches within it. It also has what I think are dead looking leaves on it right now, and our peak color turn is not quite here yet. I don't know if the tree is in a distress stage?? It is probably 50 to 60 feet tall with a trunk diameter of probably about 24 inches. I really would prefer to not take the tree down. It is a great shade tree. Thank you for any input that you can give me.
Your tree is likely infested with Aphids. The residue that falls from the tree is Honeydew; pest residue.
This article will help you.