Diadegma is a parasitoid wasp which lays its eggs into the developing larvae of the cabbage moth (Plutella xylostella) + or diamondback moth (DBM). Diadegma is the most commonly found parasite of DBM in Australia. They are strong fliers and will move quickly through a crop. Regular low level inoculations starting in late winter/early spring are very useful in establishing wasps populations and will considerably aid control of DBM.