Florel is more of a control than eradication i thought; never heared of it for eradication? It causes the berries to abort; to limit it spreading. This (and shaving) can be done every other year; as it takes that long to get mature/ fruit bearing plants. It can kinda mess with the plant, but isn't really designed to kill the clump it is sprayed on. So it sets back the plant and keeps it from spreading; like scraping. But; unlike scraping, must be done at a certain time of year, or the money/effort resources are wasted i believe.
i've had some luck with not shaving and spraying with roundup in areas where you don't want to amputate. It seems that if you don't get it on the tree leaves; it only effects the mistletoe. Being a foliar or open cut absorption chemical; getting it on some of the bark while spraying the mistletoe wouldn't hurt the host tree. i wouldn't get it on any fresh tree wounds though. i haven't scientifically tested this or anything; i have seen it written (after we tried it as last resort); so make no promises. It seems to me; that you would run the risk of the mistletoe and tree systems being conjoined; and the roundup getting into the tree like that...
If shaving; where we don't want to amputate; we have good luck painting. There was a method quoted many times of wrapping mistletoe in plastic to starve it from light. Problem was it took 3 years; and you weren't supposed to let a wet spot form. i submit that the painting after shaving works on the light starvation theory. Light and host is about all that is necessary; so short of removing the tree; we remove the other necessity(?).
It does spread from birds, skwerls and wind, but also gravity. birds and tree rats are very efficient seeders; in that they eat so sloppily; the spread stuff while eating and after. The goop in the berries is one of the most Natural sticky substances known.
Sorry about the play on wierds; hysteria is one of the things leaves are sold for in some health food stores.
Know snootiness taken nor extended bro's. This devil is an enemy of our friends the trees, so is our common enemy as well. Putt as much info and corrections out thar as possible. Like most other tree issues; folks need to know!!