Nomura M, Ishikawa Y
Laboratory of Applied Entomology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
J Insect Physiol. 2000 Apr;46(4):373-377. doi: 10.1016/s0022-1910(99)00120-1.
The effect of low temperature on completion of winter diapause was investigated in the onion maggot, Delia antiqua (Diptera: Anthomyiidae). Diapause was completed under constant diapause-inducing conditions of 15 degrees C and 12L-12D, without any exposure to lower temperature. The pupal period for 50% adult emergence was 117 days. None of the cold treatments at 5.6 degrees C examined in the present study advanced adult emergence; on the contrary, they delayed it. Detailed analyses of the results revealed that diapause development in D. antiqua comprises two phases which differ in sensitivity to low temperature, with the phase shift occurring at around day 60 at 15 degrees C and 12L-12D. In the first phase of diapause development, low temperature (5.6 degrees C) had no effect on diapause development. In the latter phase, by contrast, diapause development was retarded in proportion to the duration of cold treatment.
研究了低温对葱蝇（Delia antiqua，双翅目：花蝇科）冬季滞育完成的影响。在15摄氏度、12小时光照-12小时黑暗的恒定滞育诱导条件下，滞育得以完成，未经历任何低温处理。50%成虫羽化的蛹期为117天。本研究中所检测的5.6摄氏度的低温处理均未提前成虫羽化；相反，它们延迟了成虫羽化。对结果的详细分析表明，葱蝇的滞育发育包括两个对低温敏感性不同的阶段，在15摄氏度、12小时光照-12小时黑暗条件下，阶段转变发生在大约第60天。在滞育发育的第一阶段，低温（5.6摄氏度）对滞育发育没有影响。相比之下，在后期阶段，滞育发育与低温处理的持续时间成比例地延迟。
