Since there is no bug spray made to kill them, I have been using my small shop vac. to get rid of them. Went into the building that has my dust collector in and found 3 clump of them Probably 50 in each clump.They won't fly again.
Hmm never saw any not this year or others with the exception of perhaps a few in the garden. I treated my lawn for grubs years ago with milky spore. Its an organic treatment that kills the grubs year after year. I do still get a few Japanese Beatles mostly I assume from the fields and other yards but not many. But haven't seen a mole or a skunk since I treated as they come to feed on the grubs the grubs turn into beatles.