Physiology of Insect Rhythms

• DOI: 10.1242/jeb.60.2.371
• Publication Date: 2021-04-25T15:10:12Z
• Authors: James W. Truman; Lynn M. Riddiford
• Keywords: Prothoracic gland; Cuticle (hair); Ecdysterone; Ecdysteroid

ABSTRACT The moulting process of insects is governed by the interaction three hormones: prothoracicotropic hormone (PTTH), juvenile hormone, and ecdysone (see Doane, 1973; Wyatt, 1972; Wigglesworth, 1971 for recent reviews). To initiate moult brain releases PTTH which causes secretion from prothoracic glands. Ecdysone in turn triggers detachment epidermis old cuticle subsequent new cuticle. Whether this larval, pupal, or adult depends on titre at time secretion.