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Acaricidal activity of essential oils from Lippia alba genotypes and its major components carvone, limonene, and citral against Rhipicephalus microplus
Tick-killing effects of essential oils and main ingredients from different types of Lippia alba plants
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Abstract
Citral chemotypes showed greater larvicidal activity against Rhipicephalus microplus with an LC50 of 7.0 mg/mL.
- Purified citral demonstrated adulticidal activity with an LC50 of 29.8 mg/mL.
- Purified enantiomers of carvone had higher larvicidal activity compared to limonene.
- R-(+) limonene exhibited significantly higher efficacy (LC50 of 31.2 mg/mL) than S-(-) limonene (LC50 of 54.5 mg/mL).
- The essential oils and purified compounds were generally less toxic to engorged adult females, except for citral.
- Limited cuticular penetration may explain the reduced toxicity observed in the adult females.
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