Trichogramma are shipped while still parasitized in the host egg. They are very small - 5 of them could fit together on the end of a pencil point. Trichograma should be released at the first sign of moths. For large areas release approximately 40,000 per acre. Fly Parasites are used to attack immature fly pupae, killing them while they are immobile and helpless.
Flies have a very simple life cycle with a fast maturity rate.
This is where the fly parasite does its feeding. Fly Parasites destroy developing flies by seeking out the pupae, invading the shell and either consuming them or laying eggs inside as part of their own reproductive cycle. Theparasites' eggs hatch and eat the developing fly. Emerging from the pupal shells as adults, they repeat their cycle seeking out other fly pupae. The tiniest predators eat mostly fly eggs and small maggots, while larger predators devour the larger maggots.