Publicação on-line; 20 ref.; 1 tables; 2 illus.; Summaries (En, Pt)

RESUMO:

Compostos como o eucalipto e a citronela podem atuar contra vetores como o Aedes
aegypti Linnaeus, que são capazes de transmitir arboviroses como: Dengue, Zika, Chikungunya
e Febre Amarela, que se caracterizam como um grave problema de saúde pública. O objetivo
deste trabalho é obter e caracterizar quimicamente o óleo essencial de Siparuna guianensis
e avaliar sua atividade larvicida e de repelência frente ao Aedes aegypti. Foram utilizadas as
partes aéreas da planta S. guianensis para a extração do óleo essencial. Através do CG-MS,
foram identificados 78 compostos presentes no óleo essencial, entre eles, o terpinoleno (68,27%)
e o α-muurolol (10,61%) são majoritários. O rendimento do óleo essencial foi de 0,83%. O
resultado dos bioensaios larvicidas apontaram índices de mortalidade de 68,66%, 76,66%,
77,33%, 78,66%, 85,33% nas concentrações de 40, 80, 120, 160 e 200 mg/l, respectivamente,
durante as 48 h. Para os bioensaios de repelência obteve-se uma média de pousos de 5.00,
4.00, 4.33, 4.00, 3.66 e 2.33 nos respectivos tempos de 30, 60, 90 ,120, 150 e 180 min para
a concentração de 1000 mg/l De acordo com os resultados, o óleo essencial de S. guianensis
apresenta ação larvicida e uma forte ação repelente para a maior concentração estudada.

Palavra-chave: Arboviroses, Bioinseticida, Capitiú, Cromatografia Gasosa, Terpinoleno

ABSTRACT:

Chemical characterization and analysis of larvicidal activity and repelence
of essential oil of leaves of Siparuma guianensis against Aedes aegypti. Compounds such
as eucalyptus and citronella can act against vectors such as Aedes aegypti Linnaeus, which
are capable of transmitting arboviruses such as: Dengue, Zika, Chikungunya and Yellow Fever,
which are characterized as a serious public health problem. The objective of this work is to
obtain and characterize the essential oil of Siparuna guianensis and to evaluate its larvicidal and
repellent activity against Aedes aegypti. The aerial parts of the S. guianensis plant were used
to extract the essential oil. Through the GC-MS, 78 compounds were identified in the essential
oil, among them terpinolene (68.27%) and α-muurolol (10.61%) are the majority. The yield of
essential oil was 0.83%. The results of the larvicidal bioassays indicated a mortality rate of 68.66%,
76.66%, 77.33%, 78.66%, and 85.33% at the concentrations of 40, 80, 120, 160 and 200 mg/l,
respectively, during 48 h. For the repellency bioassays an average of 5.00, 4.00, 4.33, 4.00, 3.66
and 2.33 landings was obtained in the respective times of 30, 60, 90, 120, 150 and 180 min for
the concentration of 1000 mg/l According to the results, the essential oil of S. guianensis presents
larvicidal action and a strong repellent action for the highest concentration studied.

Keyword: Arboviroses, Bioinseticida, Capitiú, Gas Chromatography, Terpinolene