Forget about using Dylox at this point. All grubs have turned into
their adult flying form by now in Mass. so the Dylox would not be
effective.

You should use Imidacloprid, the active ingredient in MERIT. This is
about the time you want to apply MERIT in Mass. It is a systemic that
will affect newly hatched grubs. This is currently egg laying season.

Grubex no longer contains Imidacloprid.

-al sung
Hopkinton, MA
Zone 6a