Whoa, what they're talking about here is a lot more than just treating the symptoms - they're talking about sending the disease into remission and potentially even eliminating it if it's not a heavy infection, if I'm reading correctly. Anyone have a link to the actual study? I'm very curious as to whether the trees are no longer infectious.
I've always thought that "managing" an infected tree to try to keep it fruiting is a horrible thing to do, in that you're leaving around a vector for the infection of other peoples' trees. But this could be a whole different ballgame if it actually kills the disease, either completely or at least in the parts of the tree that the psilids feed on. And overheating a tree isn't exactly rocket science - enclose something in plastic sheeting in the sun and it's hard *not* to overheat it
$45 USD per tent, a couple weeks per treatment, assuming 1/2 year possible treatment window, assuming treatment every two years = $2 per tree (plus labor). That has to be worth it...