Biological performance of Eucalyptus camaldulensis leaf oils from Thailand against the subterranean termite Coptotermes formosanus Shiraki

Siramon, Pornpun; Ohtani, Yoshito; Ichiura, Hideaki

doi:10.1007/s10086-008-0990-4

Cited by 51 publications

(34 citation statements)

References 16 publications

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“…While toxicity and repellency of plant essential oils and their terpenoid constituents have been recognized for some time, the precise biochemical mechanism of action has yet to be fully understood, especially in ticks. In fact, several mechanisms of toxic action have been proposed, which include the inhibition of acetylcholinesterase [14,25,31,32,35,47], activity at the g-aminobutyric acid (GABA A ) receptor [38,50,51], the nicotinic acetylcholine receptor [52], inhibition of the transient receptor potential (TRP) channels [34], octopamine receptors [9,11,17,21], and tyramine receptors [10]. While essential oils are less toxic than conventional synthetic acaricides, they can still be effective at controlling the southern cattle tick.…”

Section: Introductionmentioning

confidence: 99%

Interaction of plant essential oil terpenoids with the southern cattle tick tyramine receptor: A potential biopesticide target

Gross

Temeyer

Day

et al. 2017

Chemico-Biological Interactions

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a b s t r a c tAn outbreak of the southern cattle tick, Rhipicephalus (Boophilus) microplus, (Canestrini), in the United States would have devastating consequences on the cattle industry. Tick populations have developed resistance to current acaricides, highlighting the need to identify new biochemical targets along with new chemistry. Furthermore, acaricide resistance could further hamper control of tick populations during an outbreak. Botanically-based compounds may provide a safe alternative for efficacious control of the southern cattle tick. We have developed a heterologous expression system that stably expresses the cattle tick's tyramine receptor with a G-protein chimera, producing a system that is amenable to high-throughput screening. Screening an in-house terpenoid library, at two screening concentrations (10 mM and 100 mM), has identified four terpenoids (piperonyl alcohol, 1,4-cineole, carvacrol and isoeugenol) that we believe are positive modulators of the southern cattle tick's tyramine receptor.

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Section: Introductionmentioning

confidence: 99%

Interaction of plant essential oil terpenoids with the southern cattle tick tyramine receptor: A potential biopesticide target

Gross

Temeyer

Day

et al. 2017

Chemico-Biological Interactions

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“…In another report, methanolic extract of E. camaldulensis had been formulated as an antidermatophytic cream preparation (15). Another study showed the antitermitic activity of oils of E. camaldulensis leaf against Coptotermes formosanus, it was demonstrated that the termiticidal mechanism was due to inhibition of acetylcholinesterase activity (16). …”

Section: Discussionmentioning

confidence: 99%

Preparation and Characterization of Liposomes Containing Essential Oil of Eucalyptus camaldulensis Leaf

Moghimipour

Aghel

Mahmoudabadi

et al. 2012

Jundishapur J Nat Pharm Prod

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A B S T R A C T Background:The increased incidence of fungal resistance has necessitated the need to search for new antifungal agents. Objective: The main objectives of the present study were to investigate the effectiveness of the essential oil of Eucalyptus camaldulensis on dermatophytes growth and to formulate and characterize a liposomal gel loaded with the essential oil. Materials and Methods:The essential oil extracted from the leaves of E. camaldulensis was analyzed by GC-MS. The antifungal activity of this essential oil was determined against Microsporum canis, M. gypseum, Trichophyton rubrum and T. verrucosum, using the well diffusion method. Liposomes were prepared by the freeze-thaw method and evaluation of size distribution was performed using a particle size analyzer. The liposomal gel was prepared using 'hydroxethyl cellulose (HEC) as the gelling agent. The rheologic characteristics were determined by a Brookfield viscometer. Results:The results showed that the minimum inhibitory volume of the essential oil was 0.125 ml and 95 ± 0.57% of the essential oil was successfully entrapped in the liposomes. The main constituents of the essential oil detected by GC-MS were; phenol, 1, 8 cineole, limonene, alcohol, pinene and terpinen. Results of particle size determination showed a wide range from 40.5 to 298 nm for the different formulations. No significant thixotropy was observed in the rheogram of the formulated liposomal gel. Conclusion: Liposomal gel formulation of the essential oil may lead to improved antifungal activity.

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“…As indicated by Siramon et al (2008), γ-terpinene and p-cymene are the two compounds that are primarily responsible for the contact toxicity of Eucalyptus camaldulensis. However, the performance of the extracts from M. utilis was inferior to those of N. heimii.…”

Section: Antitermitic Activity Of Wood Extractsmentioning

confidence: 99%

Anti-termitic potential of heartwood and bark extract and chemical compounds isolated from Madhuca utilis Ridl. H. J. Lam and Neobalanocarpus heimii King P. S. Ashton

Kadir¹,

Ali²,

Soit³

et al. 2014

Holzforschung

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The effect of wood extracts as antitermitic agents has been investigated in two Malaysian timber species, namely Madhuca utilis (bitis) and Neobalanocarpus heimii (chengal). The samples taken from Perak State Forest Reserve felled trees with the age of 38 and 45 years old, respectively. The composition of the extracts were analysed by GC-MS. In the toluene/EtOH extracts of M. utilis 19 (bark) and 17 (heartwood, hW) chemical constituents have been identified in total. The dominant compounds in bark were (2Z,6E)-farnesol (44%) and thymol methyl ether (29%) and in hW terpinen-4-ol (38%) and γ-terpinene (16%). The N. heimii essential oils contained 16 chemical constituents (8 in bark and 8 in hW) with benzyl carbinol (62%) and benzyl isoamyl ether (34%) for bark and eicosane (C20) (50%) and cyclopentanone (19%) for hW. Higher concentration of extracts from bark and hW of N. heimii, and from bark of M. utilis) gave 100% mortality of 3 rd instars of Coptotermes gestroi Wasmann and 99% for M. utilis hW extract. The extracts of both wood species showed promising antitermitic properties against subterranean termites.

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Biological performance of Eucalyptus camaldulensis leaf oils from Thailand against the subterranean termite Coptotermes formosanus Shiraki

Cited by 51 publications

References 16 publications

Interaction of plant essential oil terpenoids with the southern cattle tick tyramine receptor: A potential biopesticide target

Interaction of plant essential oil terpenoids with the southern cattle tick tyramine receptor: A potential biopesticide target

Preparation and Characterization of Liposomes Containing Essential Oil of Eucalyptus camaldulensis Leaf

Anti-termitic potential of heartwood and bark extract and chemical compounds isolated from Madhuca utilis Ridl. H. J. Lam and Neobalanocarpus heimii King P. S. Ashton

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