What is the ratio of parastiod : host eggs in trichocard production?

1 : 6 is the ratio of parasitoid: host eggs in trichocard production.
The emerging parasites readily parasitize the fresh eggs. The parasitoid-host ratio is adjusted accordingly to 1 : 6 to get effective parasitism.
The parasitized eggs in the Tricho Card turn back in 3 or 4 days and the adult parasitoids emerge in 8 to 10 days from the date of parasitization.