Anyone struggling with these? We have a (seemingly) huge number of these guys in our compost soil in the garden and all I've seen for eliminating them is nematodes. Do these work? Should I even bother? Somewhere I read that entomologists claim only 1 in 100 plants will be damaged by these grubs. I'm worried though that they are munching away at our plants's roots... and since we can't visualize any damage part of me wants to nip these in the bud.

What are your experiences with these? Are they worth the trouble eradicating or just let them be? Any help/advice is much appreciated!