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Efficacy of Origanum vulgare essential oil and carvacrol against the housefly, Musca domestica L. (Diptera: Muscidae)
- Xie, Yongjian, Huang, Qianqian, Rao, Yuqing, Hong, Liang, Zhang, Dayu
- Environmental science and pollution research international 2019 v.26 no.23 pp. 23824-23831
- Musca domestica, Origanum vulgare, carvacrol, essential oils, fumigation, gamma-terpinene, gas chromatography-mass spectrometry, insecticides, larvae, lethal concentration 50, linalool, p-cymene, pupae, thymol, toxicity
- The toxicity of Origanum vulgare essential oil to the housefly Musca domestica L. was evaluated. The major constituents of the O. vulgare essential oil by gas chromatographic mass spectrometry (GC-MS) analysis were carvacrol (58.13%), p-cymene (17.85%), thymol (8.15%), γ-terpinene (4.96%), and linalool (3.69%). Toxicity of O. vulgare essential oil against larvae and pupae was evaluated using fumigation and contact assays. The contact toxicity (LC₅₀) of O. vulgare essential oil and carvacrol for larvae was 0.23 and 0.03 μL/cm², respectively. The fumigation toxicity (LC₅₀) of O. vulgare essential oil and carvacrol for larvae was 9.52 and 2.78 μL/L, respectively. Pupal toxicity was evaluated by percentage inhibition rate (PIR). PIR of O. vulgare essential oil at 0.25 μL/cm² was 90.9% for the contact assay and 100% at 20 μL/L for the fumigation assay. PIR of carvacrol was 29.5% (0.025 μL/cm²) and 81.8% (1.25 μL/L) for the contact toxicity and fumigation assay, respectively. O. vulgare essential oil and carvacrol have significant toxicity to the housefly and are potential insecticides for housefly control.