Limonene

Biology

Essential oil

Caryophyllene

Botany

Eucalyptus globulus

Myrtaceae

Organic chemistry

Rosmarinus

Syzygium

Medicine

Chemistry

Chemical composition

Eucalyptus

Traditional medicine

Officinalis

Materials Today Proceedings

The use of essential oils as bio-insecticides presents many previous world works particularly in Morocco. In addition, the present work is concerned with the measurement of the insecticidal activity of five essential oils: Cedrus atlantica, Citrus limonum, Rosmarinus officinalis, Syzygium aromaticum and Eucalyptus globulus, against insect pests of the flour (Tribolium confusum). After extraction by a Clevenger distiller of the five species, the chemical composition of the extracted essential oil was studied by gas chromatography coupled with mass spectrometry (GC-MS). The majority of the identified compounds of Cedrus atlantica are: α-himachalene 15.63%, β-himachalene 31.24% and γ-himachalene 14.46%. The major components of Citrus limonum are: Neral 13.60%,Neryl acetate 10.77% and α-Pinene 9.46 %. The majority compounds of Rosmarinus officinalis are: (-)-camphor31.16%, β-Caryophyllene 18.55% and 2,4-hexadiene, 3,4-dimethyl-, (Z, Z) 9.08%. The main Syzygium aromaticum compounds are: 1,1,4,8-tetramethyl-cis, cis, 4,7,10-cycloundecatriene 28.74%, Caryophyllene oxide 25.34% and Eugenol 18.63%. The main compounds of Eucalyptus globulus are: Estragole 28.14%, Terpinolene 7.12% and 1,4-Hexadiene, 5-methyl-3-(1-methylethylidene) 7.01%. The insecticidal properties of the oils studied give an interesting anti-appetizing effect. A preliminary study showed that these oils have a high toxicity towards this insect

Chemical composition and insecticidal activity of five essential oils: Cedrus atlantica, Citrus limonum, Rosmarinus officinalis, Syzygium aromaticum and Eucalyptus globules