Apparatus for automatic loading of pupae into cartridges for growing, hatching into adults and dispersal of the adults, comprises: a pupa tray of pupae in liquid. A cartridge hatches the pupae into adults and may be placed in a dispersal machine for dispersal of the adults. The cartridge has a drainage hole covered in netting at a lower end, and when filled with pupae and needing water, may be placed in a water tray to retain water in the cartridge. Then, following hatching of the pupae, the cartridge is lifted from the water tray to drain via the drainage hole to provide a dry environment for the adults.