Suzuki Takeshi, Amano Hiroshi, Goto Eiji, Takeda Makio, Kozai Toyoki
Graduate School of Science and Technology, Kobe University, Rokko-dai 1-1, Nada, Kobe 657-8501, Japan.
Exp Appl Acarol. 2007;42(2):131-8. doi: 10.1007/s10493-007-9083-0. Epub 2007 Jun 5.
Artificial lighting is a merit of a 'plant factory', which might be utilized to suppress an increase in pest population. We investigated the effects of extending the light phase on diapause induction in the two-spotted spider mite (TSSM), Tetranychus urticae. TSSM were reared at 18 degrees C under light phases ranging from 2 to 64 h combined with a constant dark phase of 16 h in aluminum bottles, with white light emitting diodes attached inside to minimize fluctuations in air temperature between the light and dark phases. Diapause was induced in adult TSSM females when the light phase was 24 h or shorter, and diapause induction was inhibited when the light phase extended over 32 h. The development of deutonymphs was delayed under a diapause-inducing photoperiod. Diapause inducing photoperiods may suppress an increase in the TSSM population, by slowing down development and reproduction.
人工照明是“植物工厂”的一个优点，可用于抑制害虫数量的增加。我们研究了延长光照阶段对二斑叶螨（TSSM），即叶螨（Tetranychus urticae）滞育诱导的影响。将二斑叶螨置于18摄氏度的环境中，在铝瓶中，光照阶段从2小时到64小时不等，并结合16小时的恒定黑暗阶段，瓶内装有白色发光二极管，以尽量减少光照和黑暗阶段之间的气温波动。当光照阶段为24小时或更短时，成年二斑叶螨雌螨会进入滞育状态，而当光照阶段延长超过32小时时，滞育诱导则受到抑制。在诱导滞育的光周期下，若螨的发育会延迟。诱导滞育的光周期可能通过减缓发育和繁殖来抑制二斑叶螨种群数量的增加。
