Host preference and nymph performance of B and Q putative species of Bemisia tabaci on three host plants
文献类型: 外文期刊
第一作者: Jiao, Xiaoguo
作者: Jiao, Xiaoguo;Xie, Wen;Wang, Shaoli;Wu, Qingjun;Zhou, Long;Pan, Huipeng;Liu, Baiming;Zhang, Youjun;Jiao, Xiaoguo
作者机构:
关键词: Bemisia tabaci;Oviposition preference;Host suitability;Nymph performance
期刊名称:JOURNAL OF PEST SCIENCE ( 影响因子:5.918; 五年影响因子:5.955 )
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收录情况: SCI
摘要: Host selection is central to understanding the evolution of the interaction between herbivorous insects and host plants. Most studies on host selection of herbivorous insects are focused on the optimal oviposition theory which posits that the herbivores preferentially oviposit on plants that provide optimal conditions for offspring development (preference-performance hypothesis). However, the positive correlation between female oviposition preference and offspring performance is not always observed.Here, we determined the relationship between whitefly settling and oviposition preference and nymph performance of B and Q putative species of Bemisia tabaci on three host plants, cotton Gossypium hirsutum L., tomato Lycopersicum esculentum Mill, and poinsettia Euphorbia pulcherrima Wild. We further investigated whether nutritional and defensive chemistry of the three host species shaped whitefly settling and oviposition preference of both putative species. Foliar chemistry differed significantly amongthe three host species. Compared to cotton and tomato foliage, poinsettia foliage was 8 % lower in nitrogen, 60 % higher in carbohydrate, and 90 % higher in phenolic compounds, respectively. When given a choice, B and Q putative species of B. tabaci preferred settling onnutritionally superior tomato, whereas both putative species preferentially oviposited on nutritionally inferior poinsettia. Nymph survivorship of B and Q putative species was substantially reduced and nymph developmental duration (egg-to-adult) was markedly prolonged on poinsettia relative to those reared on cotton and tomato. Therefore, our results are consistent with the optimal foraging theory, rather than the optimal oviposition theory. Females of B and Q putative species of B. tabaci preferentially ovipositing on poinsettia may be a trade-off between nymph performance and the avoidance of natural enemy.
分类号: S4
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