Cold storage of Spodoptera litura eggs and Telenomus remus adults for improving mass-rearing efficiency

文献类型： 外文期刊

第一作者： Chen, Wanbin

作者： Chen, Wanbin;Jing, Xiaoyu;Li, Yuyan;Wang, Mengqing;Mao, Jianjun;Zhang, Lisheng;Zhang, Hongzhi;Zhang, Hongzhi;Weng, Qingfen;Nie, Rui

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关键词： biological control; host egg; mass production; rearing costs; storage duration; temperature

期刊名称：JOURNAL OF APPLIED ENTOMOLOGY （ 影响因子：2.183； 五年影响因子：2.442 ）

ISSN： 0931-2048

年卷期： 2022 年 146 卷 5 期

页码：

收录情况： SCI

摘要： Telenomus remus (Nixon) has shown promising potential as a biological control agent for the major invasive agricultural pest, Spodoptera frugiperda (J. E. Smith). Application of biological control programmes in the field requires an efficient mass-rearing system to provide sufficient numbers of beneficial insects. The short longevity of parasitoid adults and limited period of availability of host eggs are two factors affecting the mass-rearing efficiency of T. remus. Using Spodoptera litura (Fabricius) eggs as an alternative host, the effects of cold storage of S. litura eggs and T. remus adults at 5 degrees C, 8 degrees C and 11 degrees C for different time durations on the fitness of the parasitoid were investigated to identify the most suitable storage conditions. Results showed that T. remus can successfully exploit stored S. litura eggs, but the number of parasitized eggs decreased with increased egg storage duration and/or reduced storage temperature. For refrigerated adults, the survival rate declined gradually with longer storage duration, and the females' survival rate was higher than the males' at any treatment. Similarly, parasitism capacity of stored adults declined significantly with prolonged storage. Female adult longevity was significantly shorter than the control for all treatments. However, the offspring emergence rate and percentage of females were barely affected by cold storage. In conclusion, S. litura eggs can be stored at 11 degrees C for up to 9 days and adult T. remus can be stored at 8 degrees C or 11 degrees C for up to 7 days without significant losses. Data obtained from this study will help coordinate different aspects of T. remus production, decreasing costs and improving the biocontrol materials' availability.

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