I treat my wild collected spanish moss in consan triple action 20 which is physan and then slam dunk it in a 1 tbsp per gallon mix of amdro fire ant killer. Ive seen nothing survive yet. I have it growing in my greenhouse and blooming too..got to keep it moist and keep the die back from building up strangling the fresh moss..
Also added that wild collecting doesnt mean going into the parks or wildlife refuges/habitats to get it. You will soon find out if you pull this stuff from the trees or even collect it off the ground it is against the law and you can be given a ticket and your moss confiscated. If they catch you pulling it out of the trees its called destruction of state property. They gettng stikky bout that stuff these days.
I string it up over some of the rails where they can get lots and lots of fresh air and moisture.