Avaliação da eficácia de extratos oleosos de frutos verdes e maduros de cinamomo (Melia azedarach) sobre o Rhipicephalus (Boophilus) microplus (Acari: Ixodidae)
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Data
2008-03
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Resumo
Hexanic extracts gotten of the fruits of cinamomo (Melia azedarach) were tested on engourged females and larvae
of Rhipicephalus (Boophilus) microplus. Four extracts were produced: one of unripe fruits and three of ripe fruits,
being one with the fruits immediately processed, another one with fruits stored for five months and one tested after
storage of the extract for 2 (two) years at 4ºC. The tests were made in triplicate, in 0.25%- 0.0156% dilutions. The
effectiveness of extracts was evaluated through the comparison of the Reproduction Estimate of the groups “controlled
and treated” for females, of mortality for the larvae, and of the calculation of the DL50 and the relative power for
larvae and females. The extract of unripe fruits presented the effectiveness varying the 3.6% - 100% for females, and
of ripe fruits it varied of 5.2% - 99.7%. The two extracts caused a mortality of 100% of the larvae in the highest
concentrations. The extract of stored fruits presented effectiveness of 14% - 83% on females, while the extract stored
in refrigerator presented effectiveness of 8.4% 100% and both did not present larvicidal effect. The results demonstrate
a superiority of the unripe extract, with a minor DL50 and superior power 1.497 times to the extract of ripe fruits.
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Fitoterapia, Carrapatos, Controle, Phytotherapy, Ticks, Control
Citação
SOUSA, Lorena A. Dias de; SOARES, Sara F.; PIRES JUNIOR, Hélio B.; FERRI, Pedro H.; BORGES, Lígia M. Ferreira. Avaliação da eficácia de extratos oleosos de frutos verdes e maduros de cinamomo (Melia azedarach) sobre o Rhipicephalus (Boophilus) microplus (Acari: Ixodidae). Revista Brasileira de Parasitologia Veterinária, Jaboticabal, v. 17, n. 1, p. 36-40, jan./mar. 2008.