中国农业科学2011，Vol.44Issue(24)：5006-5012,7.DOI:10.3864/j.issn.0578-1752.2011.24.005
西花蓟马与烟蓟马在紫甘蓝上的种间竞争
Interspecific Competition Between Frankliniella occidentalis and Thrips tabaci on Purple Cabbage
摘要
Abstract
[Objective] The objective of this study is to investigate the interspecific competition between invasive Frankliniella occidentalis and native Thrips tabaci on purple cabbage under laboratory conditions. [Method] The fecundity, population, sex ratios of offspring of F. occidentalis and T. tabaci were evaluated after one or more generations in the mixed population or single population at different initial population rates on purple cabbage, and population growth competition and reproductive competition between F. occidentalis and T. tabaci were studied based on the above results. [Result] When both species co-existed at the initial population rates of 40:20, 30:30 and 20:40, T. tabaci completely displaced F. occidentalis after 4, 4 and 5 generations, respectively. In addition, the female ratio of F. occidentalis decreased during the process of competition. Further studies indicated that the reproductive capacity and ratio of females to males of F. occidentalis decreased significantly because of the presence of T. tabaci. When 1, 2 and 3 females of T. tabaci was added into a pair of F. occidentalis, the number of eggs laid per day per female by F. occidentalis decreased from 5.7 to 2.6,1.9 and 0.8, respectively. When the same treatment was done in a female of F. occidentalis, the number of eggs laid per day per female by F. occidentalis decreased from 7.6 to 3.6,2.5 and 1.4, respectively. When 3 and 5 females of T. tabaci was added into a pair of F. occidentalis, the ratio of females to males of offspring of F. occidentalis decreased from 3.1 to 2.4 and 1.3, respectively. [Conclusion] The competitive displacement of F. occidentalis by T. tabaci was observed in a short time in the ecological system on purple cabbage. According to this research, the mechanisms responsible for competitive displacement may include the difference in fecundity and reproduction suppression between the two thrips.关键词
西花蓟马/烟蓟马/种间竞争/生殖力竞争Key words
Frankliniella occidentalis/Thrips tabaci/interspecific competition/reproductive competition引用本文复制引用
王健立,李洪刚,马志国,郑长英..西花蓟马与烟蓟马在紫甘蓝上的种间竞争[J].中国农业科学,2011,44(24):5006-5012,7.基金项目
国家公益性行业项目科研专项(200803025)、"泰山学者"建设工程专项 （200803025）
