Intra- and Interspecific Competition Between Western Flower Thrips and Sweetpotato Whitefly

文献类型: 外文期刊

第一作者: Wu, Qing-Jun

作者: Wu, Qing-Jun;Hou, Wen-Jie;Li, Fei;Xu, Bao-Yun;Xie, Wen;Wang, Shao-Li;Zhang, You-Jun


关键词: Frankliniella occidentalis;Bemisia tabaci;intraspecific competition;interspecific competition

期刊名称:JOURNAL OF INSECT SCIENCE ( 影响因子:1.857; 五年影响因子:1.904 )

ISSN: 1536-2442

年卷期: 2014 年 14 卷


收录情况: SCI

摘要: The western flower thrips, Frankliniella occidentalis (Pergande), and the sweetpotato whitefly, Bemisia tabaci (Gennadius), are both invasive insect pests and are present in most of the same agricultural crops without a clear dominance of either species. Here, intra- and interspecific competition in B. tabaci and F. occidentalis was determined under controlled experiments. The results showed that intraspecific competition was distinct in F. occidentalis and that the co-occurrence of B. tabaci had a strong effect on F. occidentalis, resulting in a decrease in oviposition. Significant intraspecific competition was found in B. tabaci, and the coexistence of F. occidentalis had limited effect on the oviposition of B. tabaci. In a selective host plant preference experiment, both F. occidentalis and B. tabaci preferred eggplants most, followed by cucumbers and tomatoes. On cucumber plants, B. tabaci was predominant, whereas on eggplant and tomato plants, F. occidentalis and B. tabaci exhibited comparative competitive abilities during the initial stage. However, over time, higher numbers of B. tabaci than that of F. occidentalis were found on the two host plants. Our in vitro and potted plant experiments indicate that B. tabaci is competitively superior to F. occidentalis, which might help to explain their differential distribution patterns in China.


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