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中国生物防治学报 ›› 2024, Vol. 40 ›› Issue (6): 1302-1309.DOI: 10.16409/j.cnki.2095-039x.2024.03.010

• 研究论文 • 上一篇    

不同光周期对甜菜夜蛾生长发育及生殖行为的影响

潘纪龙1, 孙清明2, 苏宏华1   

  1. 1. 扬州大学植物保护学院, 扬州 225009;
    2. 广东省农业科学院果树研究所/农业农村部南亚热带果树生物学与遗传资源利用重点实验室/广东省热带亚热带果树研究重点实验室, 广州 510000
  • 收稿日期:2023-11-06 发布日期:2024-12-12
  • 通讯作者: 苏宏华
  • 作者简介:潘纪龙,硕士研究生,E-mail:1762138496@qq.com;通信作者,苏宏华,博士,副教授,E-mail:susugj@126.com。
  • 基金资助:
    江苏省农业科技自主创新资金单项技术研发(CX-22-3011);国家重点研发计划(2022YFB3604604)

Effect of Photoperiod on Growth and Development and Reproductive Behaviors of Spodoptera exigua (Hübner)

PAN Jilong1, SUN Qingming2, SU Honghua1   

  1. 1. College of Plant Protection, Yangzhou University, Yangzhou 225009, China;
    2. Institute of Fruit Trees, Guangdong Province Academy of Agricultural Sciences/Key Laboratory of Biology and Genetic Resources Utilization of South Subtropical Fruit Trees, Ministry of Agriculture and Rural Areas/Guangdong Province Key Laboratory of Tropical and Subtropical Fruit Tree Research, Guangdong Province, Guangzhou 510000, China
  • Received:2023-11-06 Published:2024-12-12

摘要: 为探明光周期对甜菜夜蛾生长发育、生殖行为的影响,本试验研究了3种不同的光周期(12L:12D、16L:8D、20L:4D)对甜菜夜蛾的生长发育及生殖行为的影响。结果表明:光照时间20 h时,甜菜夜蛾的卵孵化率仅为74.0%,幼虫历期缩短至11.5 d,幼虫存活率降低至57.8%,化蛹率仅为57.8%,蛹重减轻至0.1905 g及成虫寿命缩短至6.3 d。在雌雄比1:1的条件下连续观察7个暗期,发现在第3暗期中,12 h光照下的甜菜夜蛾求偶起始时间距暗期时长(212.4 min)是20 h光照下(51.4 min)的4倍;光周期12L:12D、16L:8D和20L:4D下的总求偶次数分别为47.7次、37.9次和25.5次,三种处理相互间均存在显著性差异;交配起始时间会随光照时间的延长而缩短或减少;12 h光照下的产卵量(855.0)约为20 h光照下产卵量(301.6)的2.5倍。本研究结果初步揭示了光周期对甜菜夜蛾生长发育和生殖行为的影响,可为甜菜夜蛾的室内人工繁育及田间绿色防控提供科学参考。

关键词: 甜菜夜蛾, 光周期, 生长发育, 生殖行为

Abstract: In order to clarity the effects of photoperiod on the growth, development and reproductive behaviours of Spodoptera exigua, three different photoperiods (12L:12D, 16L:8D, 20L:4D) were set up in the study. The results showed that, at 20 h of light duration, the hatching rate of S. exigua was only 74.0%; the larval during was shortened to 11.5 d, the survival rate of larvae was reduced to 57.8%, the pupation rate was only 57.8%, the pupal weight was reduced to 0.1905 g and the adult life span was shortened to 6.3 d. Under the condition of sex ratio of 1:1, the reproductive behavioral parameters were observed continuously in seven scotophases. In the third scotophase, the length of time between the onset of courtship and the scotophase was four times longer for S. exigua in 12 h treatment (212.4 min) than in 20 h treatment (51.4 min), the number of courtships under 12L:12D, 16L:8D and 20L:4D were 47.7, 37.9 and 25.5, respectively, and all three treatments were significantly different from each other, the mating initiation time was shortened or reduced with the increase of light time. Egg production at 12 h light (855.0) was approximately 2.5 times that at 20 h light (301.6). The results of this study preliminarily revealed the influence of photoperiod on the growth, development and reproductive behavior of S. exigua, which can provide data for indoor artificial breeding or field management of S. exigua.

Key words: Spodoptera exigua, photoperiod, growth and development, reproductive behavior

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