Journal of Integrative Agriculture ›› 2021, Vol. 20 ›› Issue (3): 745-754.DOI: 10.1016/S2095-3119(20)63274-9

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  • 收稿日期:2020-02-28 出版日期:2021-03-01 发布日期:2021-02-18

Population life tables for the invasive fall armyworm, Spodoptera frugiperda fed on major oil crops planted in China

HE Li-mei1, 2, WU Qiu-lin1, GAO Xi-wu2, WU Kong-ming1 

 
  

  1. 1 State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, P.R.China
    2 College of Plant Protection, China Agricultural University, Beijing 100193, P.R.China
  • Received:2020-02-28 Online:2021-03-01 Published:2021-02-18
  • Contact: Correspondence WU Kong-ming, E-mail: wukongming@caas.cn
  • About author:HE Li-mei, E-mail: helimei91@163.com;
  • Supported by:
    This work was supported by the National Key R&D Program of China (2019YFD0300102), the earmarked fund for China Agriculture Research System (CARS-15-19) and the Central Public-interest Scientific Institution Basal Research Fund, China (CAAS-ZDRW202007).

摘要:

草地贪夜蛾已成为广泛发生的重大农业害虫,研究明确入侵种群对中国主要农作物的适应性是制定防控策略的基础。本研究构建了草地贪夜蛾取食油菜、大豆和向日葵的实验种群生命表,比较了3种寄主作物对其生长发育和种群增长的影响。结果表明:取食大豆草地贪夜蛾的幼虫存活率明显低于油菜和向日葵,且发育时间长(23.3 d);取食油菜的蛹体重为0.19 g,显著高于其他两种寄主(取食大豆的蛹重仅为0.15 g);取食大豆、油菜和向日葵的草地贪夜蛾平均世代周期(T)分别为42.21、39.10和40.44 d,种群内禀增长率(r)分别为0.0844、0.1041和0.1134,周限增长率(λ)分别为1.0881、1.1098和1.1202。总体而言,草地贪夜蛾取食向日葵的适合度高于大豆和油菜,但均能完成生活史并实现种群的快速增长。本研究表明大豆、向日葵和油菜是草地贪夜蛾的适宜寄主,生产上应加强3种作物田间草地贪夜蛾种群发生的监测与防治工作。


Abstract:

The fall armyworm (FAW), Spodoptera frugiperda, is a newly invasive, widespread agricultural pest in China.  Understanding the suitability of the main field crops in Chinese agricultural system as host for this polyphagous herbivore is especially important for making control strategy.  Here, after FAWs were fed three important oil-bearing crops (oilseed rape, soybean and sunflower) planted in China and resultant population parameters were compared using the age-stage, two-sex life table method, survival of larvae on soybean was significantly lower than that on oilseed rape and sunflower.  Developmental duration of larvae on soybean was also the longest (23.3 days).  The highest pupation rate was recorded on sunflower.  The highest pupal mass (0.19 g) was attained on oilseed rape, significantly higher than on the other host plants; the lowest mass was on soybean (0.15 g).  On soybean, oilseed rape and sunflower, respectively, the average generation period was 42.21, 39.10 and 40.44 d; the intrinsic rate of increase (r) was 0.0844, 0.1041 and 0.1134; the finite rate of increase (λ) was 1.0881, 1.1098 and 1.1202.  While the most suitable host plant overall was sunflower, S. frugiperda completed development and increased its population on all three host plants.  Thus, soybean, oilseed rape and sunflower were all suitable for FAW, and population monitoring and management of FAW in these crops should be increased.
 

Key words: developmental duration ,  fecundity ,  life history , oil-bearing crops ,  biology ,  invasion biology