daylength

1.5、对感型杂交组合而言，在短理若遇上晚上温度较低，则表现短理效果不明显，温度较高育期明显缩短。

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.

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

诱导育实验表明：短日和低温是诱导二斑叶螨育的主要因子。