Acaricidal activity of the essential oils from Eucalyptus citriodora and Cymbopogon nardus on larvae of Amblyomma cajennense (Acari: Ixodidae) and Anocentor nitens (Acari: Ixodidae).
The present study evaluated the acaricidal activity of essential oils from Eucalyptus citriodora and Cymbopogon nardus on non-engorged larvae of Amblyomma cajennense and Anocentor nitens. In order to carry out the study, six groups were formed, each concentration being a treatment (6.25%, 12.5%, 25%, and 50%, respectively) and also with the creation of a control group (distilled water) and a positive control (Deltametrine). For each treatment, approximately 100 larvae of these ticks were placed onto filter papers (2 x 2 cm) impregnated with the concentrations used to test. Next, the envelopes were closed bearing inside the filter paper with measurements of 6 x 6 cm. For each group, six repetitions were performed, and after 24 h live and dead larvae were counted. This procedure was carried out for two essential oils on the two species of ticks. For A. cajennense, the acaricide efficacy of E. citriodora oil was of 10.8%, 35.3%, 34.5%, and 53.1%, whereas the efficacy of C. nardus was of 0.0%, 0.0%, 0.0%, and 61.1% at concentrations of 6.25%, 12.5%, 25.0%, and 50.0%, respectively. In relation to A. nitens, the acaricide efficacy of E. citriodora oil was of 20.1%, 84.5%, 89.2%, and 100.0%, whereas the efficacy of C. nardus was of 0.0%, 90.8%, 100.0%, and 100.0% at concentrations of 6.25%, 12.5%, 25.0%, and 50.0%, respectively. The results indicate that the essential oils tested showed a promising acaricidal activity mainly on A. nitens larvae.
Clemente
Mateus Aparecido
MA
Programa de Pós-graduação em Comportamento e Biologia Animal da Universidade Federal de Juiz de Fora, Juiz de Fora, Minas Gerais, Brazil. mateusbiologia@yahoo.com.br
de Oliveira Monteiro
Caio Márcio
CM
Scoralik
Márcio Goldner
MG
Gomes
Fernando Teixeira
FT
de Azevedo Prata
Márcia Cristina
MC
Daemon
Erik
E
D056810:Acaricides / Q000302:isolation & purification / Q000494:pharmacology*; D000818:Animals; D031743:Cymbopogon / Q000737:chemistry*; D005052:Eucalyptus / Q000737:chemistry*; D026863:Ixodidae / Q000187:drug effects*; D007814:Larva / Q000187:drug effects; D009822:Oils, Volatile / Q000302:isolation & purification / Q000494:pharmacology*; D016019:Survival Analysis; D013997:Time Factors
D056810:Acaricides; D009822:Oils, Volatile