Cockroaches are easy to raise in the lab.
The only problem is containing their growth. A large number of species can be maintained in laboratory cultures. When they are needed for experimental use they can be placed in a warmer incubator and given food and water. Cockroaches of several convenient sizes are available. For a large sized cockroach either Gromphadorhina portentosa or Blaberus giganteus will each provide several grams of adult tissue from each adult female.