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Acaricidal activities of Santolina africana and Hertia cheirifolia essential oils against the two-spotted spidermite (Tetranychus urticae)

Attia, Sabrine ; Grissa, K.L. ; Mailleux, A-C ; Heuskin, Stéphanie ; Lognay, Georges ; Hance, Thierry

John Wiley & Sons Ltd 2012

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Acaricidal activities of Santolina africana and Hertia cheirifolia essential oils against the two-spotted spidermite (Tetranychus urticae)
Autor: Attia, Sabrine ; Grissa, K.L. ; Mailleux, A-C ; Heuskin, Stéphanie ; Lognay, Georges ; Hance, Thierry
Assuntos: acaricidal activity ; Agriculture & agronomie ; Agriculture & agronomy ; Chemistry ; Chimie ; Entomologie & lutte antiravageur ; Entomology & pest control ; essential oil ; Hertia cheirifolia ; Life sciences ; pest control ; Physical, chemical, mathematical & earth Sciences ; Physique, chimie, mathématiques & sciences de la terre ; Santolina africana ; Sciences du vivant ; Tetranychus urticae
Notas: scopus-id:2-s2.0-84862166308
Descrição: BACKGROUND: Many plant essential oils show a broad spectrum of activity against pests. This study investigated the effects of two essential oils on Tetranychus urticae, one of the most serious pests in the world. RESULTS: The chemical composition of the two oils was characterised by GC-MS. The most abundant component in the Santolina africana (Jord. & Fourr) oil was terpinen-4-ol (54.96%), while thymol (61%) was prevalent in the Hertia cheirifolia (L.) oil. Mortality and fecundity were measured upon treatment with oil concentrations ranging from 0.07 to 6.75 mg L-1 with a Potter spray tower.Mite mortality increased with oil concentration, with LC50 values of 2.35 mg L-1 for S. africana and 3.43mg L-1 for H. cheirifolia respectively. For both oils, a reduction in fecundity was observed at concentrations of 0.07, 0.09 and 0.29mg L-1. Artificial blends of constituents of oils were also prepared and tested with individual constituents missing from the mixture. The results showed that the presence of all constituents was necessary to equal the toxicity of the two natural oils. CONCLUSION: S. africana and H. cheirifolia oils can provide valuable acaricide activitywith significantly lower LC50 values. Thus, these oils cause important mortality and reduce the number of eggs laid by females.
Editor: John Wiley & Sons Ltd
Data de criação/publicação: 2012
Idioma: Inglês

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Acaricidal activities of Santolina africana and Hertia cheirifolia essential oils against the two-spotted spidermite (Tetranychus urticae)

Attia, Sabrine ; Grissa, K.L. ; Mailleux, A-C ; Heuskin, Stéphanie ; Lognay, Georges ; Hance, Thierry

John Wiley & Sons Ltd 2012

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