![]() ![]() Insects with facultative diapause undergo a period of suspended development only when conditions require it for survival.Obligatory diapause is most often associated with univoltine insects, meaning insects that have one generation per year. Insects with obligatory diapause will undergo this period of arrested development at the predetermined point in their life cycle, regardless of the environmental conditions. ![]() ![]() Types of Diapause Diapause can be either obligatory or facultative: Quiescence, in contrast, is a period of slowed development that is triggered directly by environmental conditions, and that ends when favorable conditions return. Environmental cues aren't the cause of diapause, but they may control when diapause begins and ends. When things get tough, they take a break.ĭiapause is a predetermined period of dormancy, meaning it is genetically programmed and involves adaptive physiological changes. Many insects survive such extreme environmental conditions through diapause. They survive frigid winters and summer droughts. They live on mountaintops, in deserts, and even in the oceans. Insects inhabit every continent on Earth, from the frozen Antarctic to the balmy tropics. Diapause may occur in any life cycle stage-embryonic, larval, pupal, or adult-depending on the insect species. Insect diapause is usually triggered by environmental cues, like changes in daylight, temperature, or food availability. Diapause is a period of suspended or arrested development during an insect's life cycle. ![]()
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