I fail to see the problem.
We once employed similar tactics when dealing with a massive gypsy moth invasion back in 80' or 81'
All you need is one of those silver fire extinguishers, you know the kind they have in HS. You crack it open, drain it, refill with gas then pressurize.
Fairly crude instrument though.
It proved an ineffective method as not only did it destroy the gypsy moth webs but tended to burn the whole tree down as well.
