If you ever tried growing potato, then you must know what are pest problems. Potato beetle is one of them. Most people go for insecticide which is very wrong. That way not only we harm our self and our health, but also many insects that are actually very useful in our garden.
If you want to protect potato from pests natural way, then grow flax or horse radish between rows of potato. That will keep away blister beetle and potato beetle. Flax also improves growth and flavor of potato.