Guizhou Provincial Key Laboratory for Rare Animal and Economic Insect of the Mountainous Region, Department of Biology and Engineering of Environment, Guiyang University, Guiyang, People's Republic of China.
Department of Entomology, Institute of Plant Protection, State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, People's Republic of China.
Pest Manag Sci. 2019 Mar;75(3):598-606. doi: 10.1002/ps.5223. Epub 2018 Nov 5.
Differences in population densities of Frankliniella occidentalis among different plant species suggest a preference for particular hosts. Host plant volatiles are often involved in insect fitness. However, few studies have explored the interaction between flower volatiles and fitness. The host fitness of F. occidentalis for different flowers was assessed through field investigation, and the olfactory preference of thrips for flower volatiles was tested in the laboratory.
In the field study, 18 flower host plants were classified at four fitness levels by F. occidentalis. Olfactory tests showed that female F. occidentalis had significantly different preferences for different plant odours among the volatiles of the four tested flowers (each representing the four fitness levels), whereas male F. occidentalis did not. The relative response of F. occidentalis females to flower volatiles (Rosa rugosa > Dianthus caryophyllus > Gerbera jamesonii > Pelargonium hortorum) was consistent with the field performance of F. occidentalis. In total, 23, 29, 16 and 26 components were identified in the volatile profiles of R. rugosa, D. caryophyllus, G. jamesonii and P. hortorum, respectively. 3,5-Dimethoxytoluene (24.94%), nonanal (30.42%), (E)-3-penten-2-one (52.31%) and zingiberene (29.88%) were the single most abundant components of the volatiles of R. rugosa, D. caryophyllus, G. jamesonii and P. hortorum, respectively.
Volatiles are important in attracting F. occidentalis to suitable hosts, and differences in the types and concentrations of volatile components among flowers may directly influence the olfactory responses and field performance of thrips. Potential attractants could be developed for integrated pest management programmes against this pest. © 2018 Society of Chemical Industry.
在不同植物物种中，西方花蓟马的种群密度存在差异，这表明它们对特定宿主具有偏好。宿主植物挥发物通常与昆虫的适应性有关。然而，很少有研究探索花挥发物与适应性之间的相互作用。通过野外调查评估了西方花蓟马对不同花卉的宿主适应性，并用实验室嗅觉偏好测试法测试了蓟马对花挥发物的嗅觉偏好。
在野外研究中，18 种花卉宿主植物被分为四个适应性水平。嗅觉测试表明，在四种测试花卉（每种代表四个适应性水平）的挥发物中，雌性西方花蓟马对不同植物气味有显著不同的偏好，而雄性西方花蓟马则没有。西方花蓟马雌虫对花挥发物的相对反应（玫瑰＞香石竹＞非洲菊＞天竺葵）与西方花蓟马在野外的表现一致。在玫瑰、香石竹、非洲菊和天竺葵的挥发物图谱中，共鉴定出 23、29、16 和 26 种成分。3,5-二甲氧基甲苯（24.94%）、壬醛（30.42%）、（E）-3-戊烯-2-酮（52.31%）和姜烯（29.88%）分别是玫瑰、香石竹、非洲菊和天竺葵挥发物中含量最丰富的成分。
挥发物在吸引西方花蓟马到合适的宿主中起着重要作用，花朵之间挥发物类型和浓度的差异可能直接影响蓟马的嗅觉反应和野外表现。可以开发潜在的引诱剂，用于防治这种害虫的综合虫害管理计划。© 2018 英国化学学会。
