西花蓟马是重大入侵害虫，常导致入侵区农作物（尤其是设施蔬菜和花卉）的重大损失，前期研究发现，西花蓟马较本地近缘种花蓟马具有更强的环境适应能力。本研究设置两个CO2浓度水平，从全球气候变化-杀虫剂-昆虫种间关系的角度，比较两种蓟马对杀虫剂和CO2浓度倍增双重环境胁迫的响应差异。通过生物测定，明确西花蓟马和花蓟马对常用杀虫剂的代谢抗性和靶标敏感性；通过生理生化特性比较，分析两种蓟马对杀虫剂胁迫的生理响应，探讨不同大气环境下入侵种和本地近缘种应对杀虫剂胁迫的策略及机理机制。同时，通过行为学观察和生态学试验，测定杀虫剂持续胁迫对两种蓟马生长发育、繁殖及发育适合度的影响，比较分析两种蓟马的潜在种群增长指数、发生趋势和危害能力，诠释气候变化下入侵种和本地近缘种的种间竞争关系及抗药性变化，为西花蓟马的入侵扩张机制研究及其抗药性治理奠定基础。

Western flower thrips, Frankliniella occidentalis, is one of the main invasive insect pests in China, which often causes significant crops losses in the invaded areas (especially on vegetables and flowers in facility agriculture). Our previous studies found that western flower thrips showed higher environmental adaptability than that of their local related species, Frankliniella intonsa. The proposed research will set up two CO2 concentrations to compare the responses of the invasive and local thrips species to environmental stresses (e.g. insecticides and elevated atmospheric CO2 concentration) with regard to the interaction scenario of “global climate change-insecticide-insect interspecific relationship” . The metabolic resistance and target sensitivity of F. occidentalis and F. intonsa to commonly used insecticide will be determined by biological assay. Physiological response of the two thrips species to insecticide stress will be compared by analyzing their physiological and biological characteristics, to reveal the strategies and mechanisms of the invasive species and its local related species in different atmospheric environments to cope with insecticide stress. Meanwhile, the effects of persistent insecticide stress on thrips growth, reproduction and developmental suitability of the two thrips species will be determined through behavioral observation and ecological experiments. Potential population growth index, occurrence tendency and damage ability of F. occidentalis and F. intonsa will be compared and analyzed. Interspecific competition relationship and change of insecticide resistance between invasive species and local related species under climate change will be interpreted, which could be provide basic information for further study on the invasion and expansion mechanism of western flower thrips and its resistance management.