Some gregarious parasitoids can optimise their reproductive potential by regulating the number
of eggs on a host (clutch size) and progeny sexratio (see van Alpen and Jervis, 1996; Godfray,
1994; Waage, 1986).
Many reports suggest that parasitoids regulate clutch size based on the host size or host quality.
Le Masurier (1987), for instance, showed a positive relationship between host size and clutch size
in 52 species of Apanteles. Trichogramma embryophagum (Hartig) laid more eggs on larger hosts