There are various pest risks in kitchens, for instance ants, flies and cockroaches. Many countermeasures include killing the animals. What vegan methods of pest control are there?

There exists a wide range of methods for contraception. Some are obvious vegan (e.g. NFP), while others clearly aren't (e.g. birth control pill containing lactose). Which contraceptives are vegan? (There exists a similar question Why are some condoms not vegan?, which only covers condoms.)