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Essential oils from aerial parts of six aromatic plants were analysed by GC-MS. The major compounds identified were  γ -terpinene (11.5%), cuminaldehyde (26.6%) and  γ -terpinen-7-al (40.6%) in  Cuminum cyminum ,  trans -anethol (95.2%) in  Pimpinella anisum , α-pinene (11.6%), limonene (21.0%), β-caryophyllene (22.3%) and α-humulene (16.7%) in  Lippia integrifolia , limonene (40.8%) and artemisia ketone (19.3%) in  Lippia junelliana ,  trans -β-ocimene (15.6%), 4-ethyl-4-methyl-1-hexene (24.5%),  trans -tagetone (20.5%) and verbenone (27.2%) in  Tagetes minuta , 1,8-cineole (17.9%),elixene (10.3%) and spathulenol (13.8%) in  Aloysia gratissima . Oils with strong insecticidal activity on  Carpophilus dimidiatus  and  Oryzaephilus mercator  were from  P. anisum  (LC 50  = 4 µl/L; LC 100  = 10 µl/L) and  T. minuta  (LC 50 =10.19-12.57 µl/L; LC 100 =20 µl/L). Scents of  C. cyminum  and  L. junelliana  were strong insecticides on  O. mercator  (LC 50 =7.02-7.17 µl/L; LC 100 =10.00-20.00 µl/L). The insecticidal activity was associated to the whole content of C10 molecules and oxygenated constituents. The  P. anisum  oil is promising as protective agent of nut products.

natural product research

Chemical composition and insecticidal activity of essential oils from cultivated and native aromatic plants of Argentina against  Carpophilus dimidiatus  (Fabricius) (Nitidulidae) and  Oryzaephilus mercator  (L.) (Silvanidae)