Well, the FIRST thing you do is get all of your neighbors to set up traps in their yards
-- this means that the beetles will migrate out of YOURS. [;> There are times when I
am truly EVIL.]
Second, a good treatment with diazanon in the early fall and late spring will kill off
all the grubs before they emerge -- unfortunately killing off all the beneficials at the
same time.
The two long-term solutions are 1) moles -- which LOVE beetle grubs, but destroy your
lawn; 2) treatment of your yard with microlife that targets the beetle grubs.
Chris Owens