Diapause is a physiological state of dormancy with very specific triggering and releasing conditions; there are various definitions and contexts in which the term is used, but its most common application is in arthropods, especially insects. One of the most explicit definitions, covering many of the important features, is the following: Physiology (in Greek physis = nature and logos = word) is the study of the mechanical, physical, and biochemical functions of living organisms. ... Dormancy is a arrested plant growth. ... Subphyla and Classes Subphylum Trilobitomorpha Trilobita - trilobites (extinct) Subphylum Chelicerata Arachnida - spiders,scorpions, etc. ... Orders Subclass Apterygota Archaeognatha (bristletails) Thysanura (silverfish) Subclass Pterygota Infraclass Paleoptera (Probably paraphyletic) Ephemeroptera (mayflies) Odonata (dragonflies and damselflies) Infraclass Neoptera Superorder Exopterygota Grylloblattodea (ice-crawlers) Mantophasmatodea (gladiators) Plecoptera (stoneflies) Embioptera (webspinners) Zoraptera (angel insects) Dermaptera (earwigs) Orthoptera (grasshoppers, etc) Phasmatodea (stick insects) Blattodea (cockroaches) Isoptera (termites) Mantodea (mantids) Psocoptera...

"a neurohormonally mediated, dynamic state of low metabolic activity. Associated with this are reduced morphogenesis, increased resistance to environmental extremes, and altered or reduced behavioral activity. Diapause occurs during a genetically determined stage(s) of metamorphosis, and its full expression develops in a species-specific manner, usually in response to a number of environmental stimuli that precede unfavorable conditions. Once diapause has begun, metabolic activity is suppressed even if conditions favorable for development prevail."^[1] A neurohormone is any hormone produced by neurosecretory cells, usually in the brain. ... Santorio Santorio (1561-1636) in his steelyard balance, from Ars de statica medecina, first published 1614 Metabolism (from μεταβολισμος(metavallo), the Greek word for change), in the most general sense, is the ingestion and breakdown of complex compounds, coupled... Morphogenesis (from the Greek morphê shape and genesis creation) is one of three fundamental aspects of developmental biology along with the control of cell growth and cellular differentiation. ... A cicada in the process of shedding. ...

Of primary importance is that diapause is not only induced by specific stimuli, but - once initiated - only certain stimuli are capable of releasing the organism from this state; the latter is essential in distinguishing diapause as a different phenomenon from hibernation, for example. This article refers to the process of hibernation in biology. ...

A similar phenomenon occurs in the seeds or other resting stages of various plants. In the eggs of various vertebrates there is a phenomenon sometimes known as "embryonic diapause", which is also termed "delayed implantation," and is not directly equivalent to the phenomenon in arthropods, though in both cases there is a cessation of metabolic activity. A ripe red jalapeño cut open to show the seeds For other uses, see Seed (disambiguation). ... For other uses, see Plant (disambiguation). ... This article does not cite any references or sources. ... Embryonic diapause, in mammals is a condition where pre-implantation blastocysts are maintained in a state of dormancy, often due to environmental cues, until such time as the environment improves. ...

The definition above specifically includes the phrase "altered or reduced behavioral activity" to accommodate for the related phenomenon of reproductive diapause; this is a physiological condition where the organism itself will remain fully active, including feeding and other routine activities, but the reproductive organs experience a tissue-specific reduction in metabolism (with characteristic triggering and releasing stimuli). This is widespread in insects, including common and well-known species such as the Monarch butterfly.^[2] Binomial name (Linnaeus, 1758) The Monarch butterfly (Danaus plexippus) is a well-known North American butterfly. ...

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Helicoverpa Diapause Induction and Emergence Tool