Screening of essential oils with acaricidal activity against Haemaphysalis longicornis (Acari: Ixodidae) and analysis of active components

Xin, Ruihua; Wang, Guibo; Qiu, Zhengying; Qian, Ma; Ahmad, Shahzad; Yang, Feng; Wang, Hui; He, Jiongjie; Jing, Xiaohan; Sun, Yan

doi:10.1016/j.vetpar.2022.109712

Cited by 2 publications

(3 citation statements)

References 45 publications

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“…Clove oil emerged as the most potent agent among the tested essential oils. Our study results are consistent with the findings of Xin et al [14], who conducted a similar investigation. They screened 20 essential oils for their acaricidal effects against H. longicornis and found that cinnamon, clove, and chamomile oils exhibited the highest potency.…”

Section: Discussionsupporting

confidence: 94%

Comparative analysis of essential oil efficacy against the Asian longhorned tick Haemaphysalis longicornis (Acari: Ixodidae)

Islam,

Haque,

You

2024

Parasites Hosts Dis

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This study evaluated the potential repellent and acaricidal effects of 4 essential oils (clove, eucalyptus, lavender, and mint) against the Asian longhorned tick Haemaphysalis longicornis, a vector of various tick-borne diseases in medical and veterinary contexts. Selected for their potential repellent and acaricidal properties, the 4 essential oils were tested on adult and nymph H. longicornis ticks at different concentrations. The experiment assessed mortality rates and repellency, particularly during tick attachment to host skin. There was a significant increase (p<0.05) in tick mortality and repellency scores across all groups. At a 1% concentration, adult tick mortality ranged from 36% to 86%, while nymph mortality ranged from 6% to 97%. Clove oil exhibited notable efficacy, demonstrating high mortality rates of nymphs and adults. Clove oil also displayed strong repellency properties, with a repellency index of 0.05, surpassing those of mint, eucalyptus, and lavender oils. Clove oil showed the highest effectiveness in deterring nonattached adult ticks (90%) and nymphs (95%) when applied to skin. Clove oil was the most effective against adult and nymph ticks, achieving mortality rates of 86% and 97%, respectively, and led to the highest nonattachment rates when applied to skin. In conclusion, essential oils such as clove, eucalyptus, lavender, and mint oils present promising results for tick population control.

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Section: Discussionsupporting

confidence: 94%

Comparative analysis of essential oil efficacy against the Asian longhorned tick Haemaphysalis longicornis (Acari: Ixodidae)

Islam,

Haque,

You

2024

Parasites Hosts Dis

View full text Add to dashboard Cite

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“…where △OD represents the change in absorbed light, V is the reaction volume in mL, mg is the protein content in different concentrations of the enzyme solution, ε is the molar extinction coe cient (13,600 L/(mol × cm)) and L is the light transmission length (0.6 cm).…”

Section: Biochemical Assay Of Ache Activitymentioning

confidence: 99%

“…Cinnamaldehyde, a compound found in cinnamon with common applications in spices, medicine, and agriculture, has antibacterial, in ammatory and repellent properties [8,9,10,11]. Cinnamaldehyde also exhibits acaricidal activity against tick larvae and nymphs [12,13]. We documented signi cant repellent activity of Chinese cinnamon oil against three kinds of tick species and demonstrated that cinnamaldehyde is the main component of Chinese cinnamon oil [14].…”

Section: Introductionmentioning

confidence: 99%

Tick acetylcholinesterases mediate the repellent effect of cinnamaldehyde, a primary compound found in cinnamon oil

kuang,

Cao,

Zhou

et al. 2023

Preprint

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Background The control and prevention of ticks and tick-borne diseases relies on chemical insecticides and repellents. Plant-derived compounds potentially represent new and safer repellents. Cinnamaldehyde, a component of cinnamon oil, exhibits antibacterial, anti-inflammatory, acaricidal and repellent activity against ticks. Here we studied the molecular mechanism of the repellent effects of cinnamaldehyde on ticks. Methods Assessment of cinnamaldehyde as a tick repellent was conducted using a Y-tube olfactometer, transcriptomics and metabolomic analyses. Nymphs were exposed to cinnamaldehyde for 30 min, and the tick acetylcholinesterase (AchE) family was cloned and characterized. The role of AchE in cinnamaldehyde repellency was elucidated through the specific activity of the enzyme, electrophysiology, RNA interference and repellency tests. Results A 2% cinnamaldehyde treatment resulted in more than 90% nymph repellency within 6 h. Nymphs were exposed to cinnamaldehyde for 30 min, and subsequent transcriptome and metabolome analyses revealed the involvement of AchE in the response process. The HL-AchE family was cloned and functionally explored. AchE was transcribed in all tick developmental stages and tissues. Following cinnamaldehyde treatment, the transcript and protein levels of AchE were altered, and the specific activity of the enzyme significantly increased. RNAi was used to validate these findings. Following RNAi, electroantennography (EAG) tests demonstrated a significant decrease in response to various repellents as well as a significant decrease in repellency. Conclusions AchE mediates cinnamaldehyde-induced tick repellency, and the results provide insights into the mechanism of plant-derived tick repellents.

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Screening of essential oils with acaricidal activity against Haemaphysalis longicornis (Acari: Ixodidae) and analysis of active components

Cited by 2 publications

References 45 publications

Comparative analysis of essential oil efficacy against the Asian longhorned tick Haemaphysalis longicornis (Acari: Ixodidae)

Comparative analysis of essential oil efficacy against the Asian longhorned tick Haemaphysalis longicornis (Acari: Ixodidae)

Tick acetylcholinesterases mediate the repellent effect of cinnamaldehyde, a primary compound found in cinnamon oil

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