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| 替代寄主连续多代繁育对丽蚜小蜂寄主适应性的影响 |
| Effects of successive multi-generational rearing on alternative host on the host adaptability of Encarsia formosa |
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| 中文关键词: 丽蚜小蜂 烟粉虱 温室白粉虱 适应性 生物防治 |
| 英文关键词:Encarsia formosa Bemisia tabaci Trialeurodes vaporariorum adaptability biological control |
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| 中文摘要: |
| 【目的】为评估以烟粉虱作为替代寄主繁育丽蚜小蜂对2种粉虱的适应性，将丽蚜小蜂从原寄主温室白粉虱转换到替代寄主烟粉虱，并在烟粉虱若虫上连续繁育至第15代。【方法】以温室白粉虱繁育的丽蚜小蜂作为对照组（G0），分析在烟粉虱上连续繁育不同代数（G1、G5、G10、G15）后，丽蚜小蜂在寄生量、取食量、发育历期及羽化率等生物学参数上的变化。【结果】结果表明，G1和G5代丽蚜小蜂对烟粉虱和温室白粉虱若虫的寄生数和总致死数均显著小于G10和G15代。G1、G5和G10代丽蚜小蜂寄生烟粉虱时发育历期显著短于寄生温室白粉虱时发育历期。各世代丽蚜小蜂对2种粉虱若虫的取食量间没有显著差异。总的来看，丽蚜小蜂在替代寄主上连续繁育后，其对2种粉虱的适应性均随着繁育代数的增加而显著提升。当繁育到第10代后，丽蚜小蜂对烟粉虱的适应性显著强于温室白粉虱繁育的个体，但其对温室白粉虱的适应性与温室白粉虱繁育的丽蚜小蜂相比无显著差异。【结论】该研究结果为指导寄生蜂的繁育及有效利用提供了理论基础。 |
| 英文摘要: |
| 【Aim】This study aimed to evaluate the adaptability of Encarsia formosa reared on the alternative host Bemisia tabaci Gennadius nymphs to two whitefly species. E. formosa was transferred from its original host, Trialeurodes vaporariorum Westwood, to the alternative host, B. tabaci, and continuously reared on B. tabaci nymphs for 15 generations. 【Methods】We used E. formosa from T. vaporariorum as a control (G0) and analysed changes in biological parameters, such as the number of whitefly nymphs parasitized, number of host feeding, developmental time and emergence rate of E. formosa after successive generations (G1, G5, G10 and G15) of continuous rearing on B. tabaci nymphs. 【Results】The results showed that both the number of whitefly nymphs parasitized and total mortality caused by E. formosa on B. tabaci nymphs and T. vaporariorum nymphs were significantly lower in G1 and G5 compared to G10 and G15. The developmental time for G1, G5 and G10 of E. formosa was significantly shorter on B. tabaci nymphs than on T. vaporariorum nymphs. No significant differences in the number of host feeding were observed either across generations or between the two whitefly species. Overall, the adaptability of E. formosa reared on alternative hosts to two whitefly species increased significantly with generations. After rearing up to the 10th generation, the adaptability of E. formosa to B. tabaci nymphs was significantly better than that of wasps reared from T. vaporariorum nymphs. However, their adaptability to T. vaporariorum nymphs showed no significant difference compared to E. Formosa reared from T. vaporariorum. 【Conclusion】The findings of this study provided a theoretical foundation for guiding the rearing and effective use of parasitoid wasps. |
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