Compositional analysis and insecticidal activity of Eucalyptus globulus (family: Myrtaceae) essential oil against housefly (Musca domestica).
The essential oil of Eucalyptus globulus (Myrtales: Myrtaceae) was evaluated for its chemical composition and insecticidal activity against the housefly, Musca domestica L. (Diptera: Muscidae). Chemical composition of E. globulus oil revealed 1,8-cineole (33.6%), α-pinene (14.2%) and d-limonene (10.1%) as major constituents, while vapour profile of E. globulus oil determined through solid phase microextraction (SPME) analysis showed 1,8-cineole (56.5%), α-pinene (16.9%), d-limonene (5.5%) and linalool acetate (3.4%) as principal components. Vapour phase of the oil showed increase in the contents of oxygenated monoterpenes. Insecticidal activity of E. globulus oil was assessed against larvae and pupae of housefly, through two different bioassays: contact toxicity and fumigation. Contact toxicity assay with larva showed lethal concentration, LC(50), between 2.73 and 0.60μl/cm(2) for different observation days while lethal time, LT(50), varied between 6.0 and 1.7 days. In fumigant assay for housefly larvae, LC(50) values of 66.1 and 50.1μl/l were obtained in 24h and 48h, respectively. Oil treated larvae showed surface shrinkage, spinous cells proliferation and bleb formation in scanning electron microscopy (SEM) observation. Pupicidal effectivity was measured in terms of percentage inhibition rate (PIR) which was 36.0-93.0% for contact toxicity and 67.9-100% for fumigation toxicity assay. Considerable activity of E. globulus oil against larvae and pupae of housefly demonstrates its potentiality as a viable option for the development of eco-friendly product for housefly control.
Applied Microbiology Laboratory, Centre for Rural Development & Technology, Indian Institute of Technology Delhi, New Delhi, India.
Peeyush
P
Kumar
Sapna
S
Mishra
Anushree
A
Malik
Santosh
S
Satya
D000080462:Acyclic Monoterpenes; D000818:Animals; D000081008:Bicyclic Monoterpenes; D001681:Biological Assay; D003511:Cyclohexanols / Q000032:analysis; D053138:Cyclohexenes / Q000032:analysis; D000077591:Eucalyptol; D005052:Eucalyptus / Q000737:chemistry*; D005651:Fumigation; D008401:Gas Chromatography-Mass Spectrometry; D006793:Houseflies / Q000033:anatomy & histology / Q000187:drug effects*; D007306:Insecticides / Q000737:chemistry / Q000494:pharmacology*; D007814:Larva / Q000187:drug effects; D000077222:Limonene; D039821:Monoterpenes / Q000032:analysis; D009822:Oils, Volatile / Q000737:chemistry / Q000494:pharmacology*; D010938:Plant Oils / Q000737:chemistry / Q000494:pharmacology*; D011679:Pupa / Q000187:drug effects; D013729:Terpenes / Q000032:analysis
D000080462:Acyclic Monoterpenes; D000081008:Bicyclic Monoterpenes; D003511:Cyclohexanols; D053138:Cyclohexenes; D007306:Insecticides; D039821:Monoterpenes; D009822:Oils, Volatile; D010938:Plant Oils; D013729:Terpenes; D000077222:Limonene; C018584:linalool; C005451:alpha-pinene; D000077591:Eucalyptol