Yes, the nuclear option worked. I always spray the appropriate insecticide when I find an infestation of harmful insects, I have too much time, money, and care tied up in the trees to wait it out to see if natural predators take care of them or to use dish soap or anything else. Nuclear is the best option. I almost lost my best juniper to spider mites. In the article that I linked you can see some pictures of some predation going on, but they could not keep up with the aphids and the honey dew was causing sooty mold, so I nuked them.
The Chickasaws that I have nice trunks, I could have gotten 100 or more. There is an abandoned nursery about 45 minutes from me that has an acre or so of various crepe myrtles and other stuff too. I just don't have any room.