Ya'll wanna come stomp on 800 acres around my place? There's no manual method that'll work. I wish I could afford to spray the block. Crop dusting is really the only effective treatment, and you have to get your neighbors bugs too, or they'll migrate into the void you leave.
Nope! The stomping method only works where you have a FEW tents & you can get at 'em. Wouldn't wish thousands of tents on anyone. Jap. beetles are the biggest prob. on the fruit trees at our camp. We'll HAVE to spray for them! Good luck with your bugs.
Tents are a big nuisance for me, but haven't done much other than set back growth rates with their appetites. If I was counting on inches per year from my trees, they'd be a big problem. Since I'm along for the ride rather than a serious timber investor, I'm more upset with their poop slime falling from the sky than the leaves they've devoured creating it.
If I was suffering mortality, things would be different. Their poop slime is nasty none the less.