“…The involvement of ecdysteroids in insect nervous system reorganization, such as programmed cell death, maturation of arrested cells, and neuronal remodeling, has been well documented . In M. sexta, it has recently been demonstrated that the neurogenesis in the outer optic ganglia appears to be regulated by 20-hydroxyecdysone (Monsma and Booker, 1996). Previously, the mitogenic effects of ecdysteroids on Tenebrio accessory glands (Szopa et al, 1985), and Manduca epidermis (Kato and Riddiford, 1987), as well as on Diploptera punctata and Bombyx mori corpora allata (CA, Chiang et al, 1995Chiang et al, , 1997, have been reported.…”