Yes, they do chomp the leaves, and make swiss cheese of them,
BUTTTTTTTTTTTTT if I remember correctly,
it's the grubs they are before they emerge as beetles that eat the root system off of your plants and that weakens them, then when they chomp on the leaves it also weakens them a second time, thus your
plant may loose it's vibrancey!!
Over time, that really weakens the
plant!!
and then if you just let them be, they multiply and multiply and multiply!!! They are vicious!!!
Weezie
P/S I edited Buglady's URL, just shortened it down so it didn't go off the page for some viewers.