Effect of Thermoperiod on Diapause Induction of Sesamia nonagrioides (Lepidoptera-Noctuidae)
Effect of Thermoperiod on Diapause Induction of Sesamia nonagrioides (Lepidoptera-Noctuidae)
复制标题
温期对大螟滞育诱导的影响
DOI：
10.1603/0046-225x-29.3.489
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发表时间：
2000
期刊：
影响因子：
--
通讯作者：
E. Kagkou
中科院分区：
文献类型：
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作者：
A. Fantinou;E. Kagkou
摘要本文研究了玉米多虫性害虫九芒芝麻（Sesamia nonagrioides（Levebvre））幼虫滞育的影响因素，在地中海研究了不同光温组合对诱导松墨天牛幼虫滞育的影响。检查了nonagrioides。短日照（8-12 h）是导致该虫滞育的主要因素，而高温则能消除光周期信号的影响。不同幅度的日温度循环（热相[高相]和冷相[低相]温度之间的差异），可以诱导滞育下的光周期为12：12（L：D）时，冷相相暗相（黑暗期）。与此相反，短日照对滞育没有影响时，热相与暗相重合。此外，高温和低温的热周期之间的差异较大，导致滞育的发生率较高。滞育也发生在24小时的thermocomposes在恒定的黑暗，滞育的发病率与持续时间的冷冻相。滞育在恒定黑暗条件下的温度周期反应曲线与长日型昆虫的光周期反应曲线相似。温度周期的冷冻相必须<17.5°C，以获得较高的滞育发生率。因此，它似乎是一个温度周期阈值在冷冻相证明。因此，低温期的持续时间和温度是控制滞育反应的重要因素。这种行为的生态影响进行了讨论。
Abstract We have been studying the factors that control larval diapause of Sesamia nonagrioides (Levebvre), a multivolitine pest of corn, Zea mays L., in the Mediterranean. The effect of various combinations of photoperiod and temperature on the induction of larval diapause of S. nonagrioides was examined. Short daylengths (8–12 h) were the main factor inducing diapause in this species, whereas high temperatures could avert the effect of the photoperiodic signal. Daily temperature cycles with different amplitudes (differences between the thermophase [high phase] and cryophase [low phase] temperatures), could induce diapause under a photoperiod of 12:12 (L:D) h when the cryophase coincided with the scotophase (dark period). In contrast, short daylengths had no effect on diapause when the thermophase coincided with the scotophase. Moreover, greater differences between the high and the low temperatures of the thermoperiod led to a higher incidence of diapause. Diapause also occurred under 24-h thermoperiods at constant darkness; the incidence of diapause correlated with the duration of the cryophase. The thermoperiodic response curve of diapause under constant darkness was analogous to that of the photoperiodic response of a type I, or long-day insect. The cryophase of the thermoperiod must be <17.5°C to obtain a high incidence of diapause. Consequently, it appeared that a thermoperiodic threshold during the cryophase was demonstrated. Hence, both the duration and the temperature of the cryophase of the thermoperiod were important factors controlling the diapause response. The ecological implications of this behavior are discussed.