Acaricidal activity and repellency of essential oil from Piper aduncum and its components against Tetranychus urticae.
Exp Appl Acarol
; 57(2): 139-55, 2012 Jun.
Article
em En
| MEDLINE
| ID: mdl-22415244
The chemical composition of essential oil of leaves of Piper aduncum L., growing wild in a fragment of the Atlantic Rainforest biome in northeastern Brazil, was determined through gas chromatography-mass spectrometry. The acaricidal activity and repellency of the essential oil and its components [dillapiole (0.28 g/ml), α-humulene (0.016 g/ml), (E)-nerolidol (0.0007 g/ml) and ß-caryophyllene (0.0021 g/ml)] were evaluated in the laboratory against adults of Tetranychus urticae Koch. The mites were more susceptible to the oil in fumigation tests (LC(50) = 0.01 µl/l of air) than in contact test with closed Petri dish (LC(50) = 7.17 µl/ml); mortality was reduced by approximately 50 % in the latter test. The repellent action of the oil and toxicity by fumigation and contact did not differ significantly from the positive control (eugenol). The repellent activity was attributed to the components (E)-nerolidol, α-humulene and ß-caryophyllene, whereas toxicity by fumigation and contact was attributed to ß-caryophyllene. The effect of Piper oil and the role of its components regarding host plant preference with a two-choice leaf disk test are also discussed.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Óleos de Plantas
/
Óleos Voláteis
/
Tetranychidae
/
Piper
/
Acaricidas
/
Repelentes de Insetos
Limite:
Animals
País/Região como assunto:
America do sul
/
Brasil
Idioma:
En
Revista:
Exp Appl Acarol
Assunto da revista:
BIOLOGIA
/
PARASITOLOGIA
Ano de publicação:
2012
Tipo de documento:
Article
País de afiliação:
Brasil
País de publicação:
Holanda