To begin, place commercially available Lucillia sericata pupae on a sheet of paper. Discard any underdeveloped larvae, dark old pupae, empty pupil shells, sawdust, or other impurities. Transfer young brownish red colored pupae to a beaker and immerse the pupae in deionized water.
Wrap the beaker with tinfoil or gauze and shake it to clean any surface impurities off the pupae. Then discard the water. Place the cleaned pupae in the filter tank of a garlic press, and squeeze hard.
Then collect the pupae tissue fluid in a 50-millimeter sterile centrifuge tube, and centrifuge it at 25, 000 x g for 10 minutes at four degrees Celsius. Using a 22-gauge sterile needle, collect the protein layer into a new 50-millimeter polypropylene centrifuge tube, and add commercial liquid drosophila medium at an equal ratio to the protein extract. To remove the particles of different sizes from the mixture, filter it using a vacuum filtration system with filter paper of different pore sizes.
To prevent clogging change the filter paper when the flow slows down. Once the filtrate is centrifuged, sterilize the supernatant through a 0.22 micrometer syringe filter, and store the prepared nasonia rearing medium, or NRM aliquots, at 20 degrees Celsius until further use.
