Toxicities of Eucalyptus dives Oil, 3-Carvomenthenone, and Its Analogues against Stored-Product Insects.
JOURNAL OF FOOD PROTECTION(2018)
摘要
The insecticidal toxicities of essential oils and other active components extracted from Eucalyptus dives leaves (as well as structural analogues) were studied against stored-product insects, Plodia interpunctella and Tribolium castaneum. 3-Carvomenthenone was purified from E. dives oil, and the structures were elucidated by electron ionization mass spectra, H-1-nuclear magnetic resonance (NMR), C-13-NMR, heteronuclear multiple quantum coherence, H-1-H-1 correlation spectroscopy, and distortionless enhancement by polarization transfer NMR. Using the fumigant method against P. interpunctella larvae and adults, cyclohexenone exhibited the strongest toxicity (50% lethal dose [LD50] against larvae and adults, 2.45 and 3.63 mu g/cm(3)), followed by methylcyclohexenone (2.95 and 4.24 mu g/cm(3)), seudenone (3.02 and 4.44 mu g/cm(3)), and 3-carvomenthenone (52.4 and 68.7 mu g/cm(3)). Using the contact method, cyclohexenone (LD50 against larvae and adults, 17.25 and 19.35 mu g/cm(2)) exhibited the most potent toxicities against T. castaneum larvae and adults, followed by methylcyclohexenone, seudenone, and 3-carvomenthenone. No functional radical on the backbone (2-cyclohexen-1-one) was more toxic than other chemicals. Structureactivity relationships between 3-carvomenthenone analogues and toxicities indicated that the toxicity of 3-carvomenthenone, cyclohexenone, methylcyclohexenone, and seudenone might be conferred through the dermal organs of T. castaneum and P. interpunctella. This study indicates that E. dives oil, 3-carvomenthenone, cyclohexenone, methylcyclohexenone, and seudenone have potential as natural agents to control stored-product insects.
更多查看译文
关键词
Carvomenthenone,Eucalyptus dives,Plodia interpunctella,Structure-activity relationships,Tribolium castaneum
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要