I used to grow a lot of sarrs. I don't know which bugs you're trying to combat, but pitcher plants probably won't measurably impact your pests. If you have fungus gnats, either switch to an inorganic substrate, or use Gnatrol (a form of Bacillus thuringiensis, which is a bacterial larvicide- not a chemical pesticide).
Some sundews work well to trap flying pests, but the low humidity here in the desert prevents them from being grown well. Some other insectivorous plants can be quasi-adapted to lower humidity, but as a rule, they all pretty much need high light, high humidity, and absolutely nothing but very dilute fertilizer solutions.
