Abstract In this work, the essential oils (EOs) of Alpinia zerumbet (Pers.) Burtt. et Smith were extracted from different organs (stems, leaves, flowers and fruits). The GC-MS analysis showed that two isomers m-cymene and o-cymene distributed totally diverse among different organs: m-cymene were relatively rich in the EOs from stems, flowers and fruits (7.1, 11.3 and 6.6%, respectively), but absent in the EO from leaves; o-cymene was predominant in the EO from leaves (14.9%), but missing in the EOs from other organs. A. zerumbet EOs from different organs, as well as seven characteristic compounds (m-cymene, o-cymene, camphene, eucalyptol, linalool, camphor, and borneol) showed varying degrees of insecticidal and repellent activities to Tribolium castaneum and Liposcelis bostrychophila. o-Cymene exhibited stronger fumigant and contact toxicity than m-cymene did to both insect species, suggesting that the relative position of methyl and isopropyl on benzene ring would influence the insecticidal activity. Positive correlation between relative content of camphor and LC50 value to T. castaneum was significant, while fumigant and contact toxicity of EOs appeared to be negatively correlated with the content of m-cymene.

中文翻译：

---

伞花烃异构体对山姜精油杀虫和驱虫活性的潜在贡献

摘要 在这项工作中，Alpinia zerumbet (Pers.) Burtt 的精油 (EOs)。等史密斯是从不同的器官（茎、叶、花和果实）中提取的。GC-MS 分析表明，间伞花烃和邻伞花烃两种异构体在不同器官中的分布完全不同：间伞花烃在茎、花和果实的 EOs 中相对丰富（分别为 7.1、11.3 和 6.6%），但叶的 EO 中不存在；o-cymene 在来自叶子的 EO 中占主导地位 (14.9%)，但在来自其他器官的 EO 中缺失。来自不同器官的 A. zerumbet EOs 以及 7 种特征化合物（间伞花烃、邻伞花烃、莰烯、桉油精、芳樟醇、樟脑和冰片）对 Tribolium castaneum 和 Liposcelis bostrychophila 显示出不同程度的杀虫和驱虫活性。邻散花烃对两种昆虫均表现出比间散花烃更强的熏蒸和接触毒性，表明苯环上甲基和异丙基的相对位置会影响杀虫活性。樟脑的相对含量与 LC50 值呈显着正相关，而 EOs 的熏蒸和接触毒性似乎与间伞花烃的含量呈负相关。