title: Insecticidal activity of essential oil of Carum Carvi fruits from China and its main components against two grain storage insects.
abstract: During our screening program for agrochemicals from Chinese medicinal herbs and wild plants, the essential oil of Carum carvi fruits was found to possess strong contact toxicity against Sitophilus zeamais and Tribolium castaneum adults, with LD₅₀ values of 3.07 and 3.29 μg/adult, respectively, and also showed strong fumigant toxicity against the two grain storage insects with LC₅₀ values of 3.37 and 2.53 mg/L, respectively. The essential oil obtained by hydrodistillation was investigated by GC and GC-MS. The main components of the essential oil were identified to be (R)-carvone (37.98%) and D-limonene (26.55%) followed by α-pinene (5.21), cis-carveol (5.01%) and β-myrcene (4.67%). (R)-Carvone and D-limonene were separated and purified by silica gel column chromatography and preparative thin layer chromatography, and further identified by means of physicochemical and spectrometric analysis. (R)-Carvone and D-limonene showed strong contact toxicity against S. zeamais (LD₅₀ = 2.79 and 29.86 μg/adult) and T. castaneum (LD₅₀ = 2.64 and 20.14 μg/adult). (R)-Carvone and D-limonene also possessed strong fumigant toxicity against S. zeamais (LC₅₀ = 2.76 and 48.18 mg/L) and T. castaneum adults (LC₅₀ = 1.96 and 19.10 mg/L).
authors.affiliation: Protection and Utilization of Traditional Chinese Medicine of Beijing Area Major Laboratory, Beijing Normal University, Haidian District, Beijing 100875, China.
authors.forename: Rui
authors.initials: R
authors.lastname: Fang
authors.forename: Cai Hong
authors.initials: CH
authors.lastname: Jiang
authors.forename: Xiu Yi
authors.initials: XY
authors.lastname: Wang
authors.forename: Hai Ming
authors.initials: HM
authors.lastname: Zhang
authors.forename: Zhi Long
authors.initials: ZL
authors.lastname: Liu
authors.forename: Ligang
authors.initials: L
authors.lastname: Zhou
authors.forename: Shu Shan
authors.initials: SS
authors.lastname: Du
authors.forename: Zhi Wei
authors.initials: ZW
authors.lastname: Deng
mesh_terms: D000818:Animals; D029974:Carum / Q000737:chemistry*; D002523:Edible Grain; D007306:Insecticides / Q000737:chemistry* / Q000494:pharmacology*; D009822:Oils, Volatile / Q000737:chemistry* / Q000494:pharmacology*; D014231:Tribolium
chemical_list: D007306:Insecticides; D009822:Oils, Volatile