Have you tried companion planting your potatoes with beans? Colorado potato beetles hate beans and bean beetles hate potatoes. Growing them together thwarts both pests. I have tried both interplanting both in the same row and alternating rows. Both ways work. I have been planting beans with my potatoes like this when I have planted potatoes (I don't plant them every year) since 1976. I haven't had potato bugs since then.
In books on companion planting they recommend alternating rows of bush beans and potatoes. Interplanting can be a little hard on your bean production, but it does also work.
Susan
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