The experiments of diapause induction showed that both short daylength and low temperature were major factors of diapause induction in T.urticae. 诱导滞育实验表明:短日照和低温是诱导二斑叶螨发生滞育的主要因子。
On Earth, daytime is roughly the period on any given point of the planet's surface during which it experiences natural illumination from indirect or (especially) direct sunlight.
Other planets that rotate in relation to a luminous primary, such as a local star, also experience daytime of a sort, but this article primarily discusses daytime on Earth.