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Influence of green light at night on Juvenile hormone in the oriental armyworm Mythimna separata (Lepidoptera: Noctuidae)
Physiological Entomology ( IF 1.5 ) Pub Date : 2019-07-30 , DOI: 10.1111/phen.12300
Kil‐Nam Kim 1, 2 , Un‐Chol Sin 3 , Yun‐Chol Jo 4 , Zhi‐Juan Huang 1 , Ali Hassan 1 , Qiu‐Ying Huang 1 , Chao‐Liang Lei 1
Affiliation  

The oriental armyworm Mythimna separata is an agricultural insect pest in Eastern Asia. Mythimna separata moths have a high phototactic response to green (520 nm) light. The biological characteristics of insects living under light of a specific wavelength at night can change and, accordingly, Juvenile hormone (JH) levels may be influenced by this light. The present study evaluates changes in the total JH levels at different developmental stages (larvae, pupae and adults) of M. separata reared under green light with different exposure periods at night (or dark period). The results show that, when the exposure time per day of the green light at night is extended, the JH levels in the final‐instar larvae (22 days) and older age pupae (8 days) are significantly reduced, and the JH levels in earlier age pupae (4 days) and adults (3, 6 and 9 days) are significantly increased, compared with groups not exposed to green light. Additionally, the JH level of male moths significantly differs from that of the female moths. We suggest that the JH level of M. separata insects could be regulated by the green light at night (or dark period). The findings of the present study will help to explain the relationship between the light environment and biological characteristics in nocturnal moths.

中文翻译:

夜间绿光对东方粘虫Mythimna separata(鳞翅目:夜蛾科)保幼激素的影响

东方粘虫 Mythimna separata 是东亚地区的一种农业害虫。Mythimna separata 飞蛾对绿色 (520 nm) 光具有高趋光性响应。夜间生活在特定波长光下的昆虫的生物学特性会发生变化,因此,保幼激素 (JH) 水平可能会受到这种光的影响。本研究评估了在夜间(或黑暗时期)不同暴露时间的绿光下饲养的 M. separata 在不同发育阶段(幼虫、蛹和成虫)的总 JH 水平的变化。结果表明,当夜间绿光暴露时间延长时,终龄幼虫(22天)和大龄蛹(8天)的JH水平显着降低,幼虫的JH水平显着降低。幼龄蛹(4 天)和成虫(3, 6 天和 9 天)与未暴露于绿光的组相比显着增加。此外,雄蛾的 JH 水平与雌蛾的显着不同。我们认为 M. separata 昆虫的 JH 水平可以通过夜间(或黑暗时期)的绿光进行调节。本研究的结果将有助于解释夜蛾的光环境与生物学特性之间的关系。
更新日期:2019-07-30
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