LeeAnne wrote:

Where are you located? They are slowly spreading throughout New England
(I'm north of Boston) and I believe they are in southern NH now as well.

I'm in southern NH and I've got them. Fortunately, I only have three lilies in
my yard. My master gardener reports some clients have claimed to have some
success using Grubex. She also suggested BioNeem(?), but you have to apply it
every three days and we've been getting too much rain of late for that to be
effective.