Dust the potato plants with DE (diatomaceous earth dust). It will save you a bi-zillion trips over there.I just figured it up. Costs around $10.00 in gas to go to my sons and back.
So I have to do this for about 60 days going back and forth.
But I can do other things while there. But not every day.
The dust is like a bi-zillion microscopic knives that cut into all kinds of insects, even into larva.
We spread it on non-windy, dry days by hand as close to the plant leaves as possible.
50-lbs bag is $18.