Colorado beetle

I found colorado beetle larvae on my potato plants. I rototilled and used a ruth stout method with gras clipping for my potatoes. Got 4 rows of 50 feet this way, i noticed about 100 larvae and one adult.   Also i got a lot of ladybugs, spiders and other insects, i hope the ladybugs will feast on eggs and first stage larvae.   I started by collecting with a small broom, i will repeat this daily as i see them. Also i'm spraying fruit spray, in hopes of making the leaves stronger against sucking insects.   Anyone got experience dealing with this? I know they got nematodes, but i read they only live for one season. I dont like to be dependend on one time sollutions bought in a box.