Department of Biological Sciences, Centre for Pest Management, Canada.
J Chem Ecol. 1993 Apr;19(4):681-97. doi: 10.1007/BF00985001.
Analysis by gas chromatography (GC) and GC-mass spectroscopy disclosed that droplets of anal fluid produced by second-instar western flower thrips,Frankliniella occidentalis (Pergande) (Thysanoptera: Thripidae), contain a two-component alarm pheromone, comprised of decyl acetate and dodecyl acetate, in a molar ratio of approximately 1.5∶1. Both nymphs and adults responded to the pheromone by walking away from the source. The synthetic pheromone was active at a concentration of 1.0 ng, and the proportions of insects responding to the pheromone, but not the distances moved, increased with increasing dose. Each component was active alone, although at low doses, the response to decyl acetate was less than to either dodecyl acetate or the blend. The pheromone also induced some second instars to drop from leaves and reduced oviposition by adult females in both two-choice and nochoice experiments. Because the response of western flower thrips to the alarm pheromone is relatively weak, the potential for its use in pest management is limited, unless it is used in conjunction with other control measures.
气相色谱（GC）和 GC-质谱分析表明，西花蓟马（Frankliniella occidentalis (Pergande)）（缨翅目：蓟马科）二龄若虫产生的分析液滴中含有一种由乙酸癸酯和乙酸十二酯组成的双组分报警信息素，摩尔比约为 1.5∶1。若虫和成虫均对该信息素做出反应，远离来源。合成信息素在 1.0ng 浓度下具有活性，对信息素做出反应的昆虫比例（而不是移动的距离）随剂量的增加而增加。每个成分单独起作用，尽管在低剂量下，乙酸癸酯的反应小于乙酸十二酯或混合物。该信息素还可诱导一些二龄若虫从叶片上掉落，并减少两性成虫在二选和无选实验中的产卵。由于西花蓟马对报警信息素的反应相对较弱，除非与其他控制措施结合使用，否则其在害虫管理中的应用潜力有限。
