Night-interrupting light inhibits diapause induction in the Kanzawa spider mite, Tetranychus kanzawai Kishida (Acari : Tetranychidae)
Night-interrupting light inhibits diapause induction in the Kanzawa spider mite, Tetranychus kanzawai Kishida (Acari : Tetranychidae)
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夜间干扰光抑制神泽叶螨、Tetranychus kanzawai Kishida（螨虫：叶螨科）的滞育诱导
DOI：
10.1016/j.jinsphys.2011.05.018
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发表时间：
2011
影响因子：
2.2
通讯作者：
Katsumi Ohyama
中科院分区：
文献类型：
--
作者：
Maqsood Shah;Takeshi Suzuki;Noureldin Abuelfadl Ghazy;Hiroshi Amano;Katsumi Ohyama
通过室内实验研究了断夜光照的时间、强度和周期对关泽叶螨滞育诱导的抑制作用。在分别为8和16h d - 1的光照和暗期，在暗期的早期(E)、中期(M)和后期(L)部分，即在暗期开始后的3、7.5和12h，分别施加1小时的单次夜间中断光。对照处理不施加中断光。M处理的滞育率（63%）显著低于对照处理（100%）。在E和L处理中，90%以上的雌蜂进入滞育，与对照处理相当。由于E和L处理的最长连续暗期大于10.5-11hd−1的临界暗期（CDP），在此期间50%的雌性进入滞育，因此夜间干扰光可能未能阻止滞育诱导。而M处理最长连续暗期短于CDP处理；因此，断夜光抑制滞育诱导。此外，在M处理中，夜间干扰光的抑制作用随着i_1和it_1的增加而增强。夜间干扰光剂量（II×IT）与滞育发生率呈显著负相关。50%滞育诱导干扰的中位有效剂量为2.5kJm−2，波长在350 ~ 1050nm之间。本研究结果表明，在商业农田中，采用光照物理控制来抑制坎泽瓦伊滞育诱导和越冬时，应同时考虑最长连续暗期和夜间干扰光的剂量。
The inhibitory effects of the timing, intensity (II) and period (IT) of night-interrupting light on diapause induction of the Kanzawa spider mite (Tetranychus kanzawai) were investigated in a series of laboratory experiments. During a light and dark period of 8 and 16h d−1, respectively, a single 1-h night-interrupting light was applied at early (E), middle (M), and late (L) parts of the dark period: i.e., at 3, 7.5, and 12h after the start of the dark period, respectively. No interrupting light was applied in the control treatment. The incidence of diapause was significantly lower in the M treatment (63%) compared to the control treatment (100%). In the E and L treatments, more than 90% of females entered diapause, which was comparable to the control treatment. Since the longest consecutive dark period during the E and L treatments was longer than the critical dark period (CDP) of 10.5–11hd−1, during which 50% of females entered diapause, the night-interrupting light probably failed to prevent diapause induction. However, in the M treatment, the longest consecutive dark period was shorter than the CDP; therefore, the night-interrupting light inhibited diapause induction. Moreover, the inhibitory effects of night-interrupting light in the M treatment increased as IIand ITincreased. The dose of night-interrupting light (II×IT) was significantly negatively related to the incidence of diapause. The median effective dose for 50% disturbance of diapause induction was 2.5kJm−2at wavelengths between 350 and 1050nm. Our results suggest that the longest consecutive dark period and the dose of night-interrupting light should both be considered when a lighting-based physical control is applied to inhibit diapause induction and consequent overwintering of T. kanzawai in commercial agricultural fields.