daylength

5、对感光型杂交组合而言，在短光照处理晚温度较低，则表现短光照处理效果不明显，温度较高发育期明显缩短。

If it existes in the low temperature at night, under the shorter daylength condition, its absence of the shorter daylength is effective in the higher temprature.The growing stage can shorten easily.

The experiments of diapause induction showed that both short daylength and low temperature were major factors of diapause induction in T.urticae.

诱滞育实验表明：短日照和低温是诱叶螨发生滞育的主要因子。