Providing aged parasitoids can enhance the mass-rearing efficiency of Telenomus remus, a dominant egg parasitoid of Spodoptera frugiperda, on Spodoptera litura eggs

文献类型： 外文期刊

第一作者： Chen, Wanbin

作者： Chen, Wanbin;Wang, Mengqing;Li, Yuyan;Mao, Jianjun;Zhang, Lisheng

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关键词： Biological control; Fall armyworm; Host egg age; Parasitoid age; Mass-rearing efficiency; Oviposition behavior

期刊名称：JOURNAL OF PEST SCIENCE （ 影响因子：5.742； 五年影响因子：5.562 ）

ISSN： 1612-4758

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收录情况： SCI

摘要： Telenomus remus (Nixon) is an egg parasitoid of several Spodoptera spp. insects, especially the destructive agricultural pest Spodoptera frugiperda (J. E. Smith). Studies showed that this parasitoid can be efficiently reared on Spodoptera litura (Fabricius) eggs. Understanding the relationship among parasitoid age, host egg age, and parasitism efficiency is an important part of mass-rearing biological control agents. To this end, we measured the impacts of female T. remus age (1-, 2-, 3-, and 4-day-old), S. litura egg age (1-, 2-, and 3-day-old), and their interactions on parasitism capacity, developmental time, offspring fitness, and oviposition behavior. The results indicated that the 3-day-old and 4-day-old parasitoids had higher parasitism performance on all age eggs than 1-day-old and 2-day-old parasitoids, especially on 3-day-old eggs. The number of parasitized eggs decreased as egg age increased, and the developmental time of the progeny increased. The emergence rate and percentage of females were hardly affected. For oviposition behavior, 4-day-old parasitoids showed the same drumming and oviposition time on different age eggs, while for others the drumming, drilling, oviposition, and total time increased with increasing S. litura egg age. In summary, the optimal combinations were 3-day-old or 4-day-old female parasitoids and 1-day-old or 2-day-old S. litura eggs. The findings presented in this study can be employed to enhance T. remus mass-rearing efficiency and availability.

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