Acaricidal Effects of Melaleuca cajuputi Essential Oil on Rhipicephalus sanguineus Ticks in Dogs
Acaricidal Effects of Melaleuca cajuputi Essential Oil on Rhipicephalus sanguineus Ticks in Dogs
Department of Animal Science and Veterinary Medicine, Faculty of Agriculture and Aquaculture, Tra Vinh University, Vietnam.
*Correspondence | Nguyen Van Vui, Department of Animal Science and Veterinary Medicine, Faculty of Agriculture and Aquaculture, Tra Vinh University, Vietnam; Email: [email protected]
ABSTRACT
The Rhipicephalus sanguineus tick, a common parasite of dogs, poses significant health risks to both canines and humans. This study assessed the impact of Melaleuca cajuputi essential oil on the larval development and reproduction of engorged female ticks of this species. The essential oil was obtained through steam distillation, and its active constituents were analysed using gas chromatography-mass spectrometry (GC-MS). To evaluate its effectiveness in larval mortality and reproductive inhibition in ticks, adult immersion and larval packet assays were performed. Chemical analysis revealed 45 components, comprising over 97.66% of the total constituents, with major compounds including α-Terpineol, Eucalyptol, β-Linalool, β-Selinene, and β-Caryophyllene. The lethal effects of Melaleuca cajuputi essential oil on larvae were assessed using LD50, LD90, and LD99 values of 1.27, 8.96, and 43.95 mg/mL, respectively. The oil also reduced egg-laying capacity, with a 42.82±2.21% reduction at the LD50 concentration for larvae. These findings suggest that Melaleuca cajuputi essential oil has strong in vitro larvicidal potential and can negatively impact the reproductive capacity of Rhipicephalus sanguineus ticks.
Keywords | Acaricide, Melaleuca cajuputi, Essential oils, Rhipicephalus sanguineus, Ticks, Dogs
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June 2025
Vol. 13, Iss. 2
