As a biological control
Several species of parasitic wasps are parasites of mealybug nymphs. Most commonly available is Leptomastix dactylopii, a parasite of citrus mealybug. Leptomastidea abnormis also is specific to citrus mealybug, while Anagyrus pseudococci has a somewhat broader host range and develops on Comstock mealybug as well.
Anagyrus pseudococci was not found in most current review of suppliers