I have not been so concerned with the grubs, but moles eat them and tunnel everywhere in search of them. Several years ago we had masses of grubs, then the moles moved in. I am surprised so far they have not done real damage to my daylilies. I rarely find grubs when I dig now, I keep thinking the moles will go away from lack of food, but so far they are still tunneling, despite my cats catching one frequently.
