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No. de sistema: 000058779

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c| ECO
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245 0 0 a| Behavioural and electrophysiological responses of Triatoma dimidiata nymphs to conspecific faecal volatiles
506 _ _ a| Acceso electrónico sólo para usuarios de ECOSUR
520 1 _ a| The behavioural and electrophysiological (electroantennography) responses of the first two instars of Triatoma dimidiata (Hemiptera: Reduviidae) Latreille to fresh and dry faecal headspace volatile extracts from fifth instar conspecific nymphs and synthetic compounds were analysed in this study. Recently emerged nymphs (3–5 days) aggregated around filter paper impregnated with dry faeces and around filter paper impregnated with extracts from both fresh and dry faeces. Older first instars (10–15 days) and second instars aggregated around filter paper impregnated with fresh and dry faeces, and their respective headspace extracts. Dry faecal volatile extracts elicited the strongest antennal responses, followed by fresh faecal extracts. Gas chromatography−mass spectrometry analysis of dried faecal headspace volatiles demonstrated the presence of 12 compounds: 2-ethyl-1-hexanol, 1,2,4-trimethylbenzene, n-octadecane, n-nonadecane, n-eicosane, n-heneicosane, n-tricosane, n-pentaeicosane, n-hexaeicosane, n-octaeicosane, nonanal, and 4-methyl quinazoline. In fresh faecal headspace extracts, only nonanal was clearly detected, although there were other trace compounds, including several unidentified sesquiterpenes. Four of the 11 compounds tested individually elicited aggregation behaviour at concentrations of 100 ng/μL and 1 μg/μL. A blend containing these four components also mediated the aggregation of nymphs. These volatiles may be valuable for developing monitoring methods and designing sensitive strategies to detect and measure T. dimidiata infestation.
538 _ _ a| Adobe Acrobat profesional 6.0 o superior
650 _ 4 a| Triatoma dimidiata
650 _ 4 a| Hemiptera
650 _ 4 a| Insectos vectores
650 _ 4 a| Compuestos volátiles
650 _ 4 a| Electrofisiología
651 _ 4 a| Tapachula (Chiapas, México)
700 1 _ a| Gálvez Marroquín, Zitlalic
700 1 _ a| Cruz López, Leopoldo Caridad
c| Dr.
e| coaut.
700 1 _ a| Malo Rivera, Edi Álvaro
c| Doctor
e| coaut.
700 1 _ a| Ramsey Willoquet, Janine M.
c| Dra.
e| coaut.
700 1 _ a| Rojas, Julio C.
e| coaut.
773 0 _
t| Medical and Veterinary Entomology
g| Vol. 32, no. 1 (March 2018), p. 102–110
x| 0269-283X
900 _ _ a| Solicítelo con su bibliotecario/a
902 _ _ a| GOG / MM
904 _ _ a| Marzo 2018
905 _ _ a| Artecosur
905 _ _ a| Artfrosur
905 _ _ a| Biblioelectrónica
LNG eng
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*Solicítelo con su bibliotecario/a
Behavioural and electrophysiological responses of Triatoma dimidiata nymphs to conspecific faecal volatiles
Gálvez Marroquín, Zitlalic (autor)
Cruz López, Leopoldo Caridad (autor)
Malo Rivera, Edi Álvaro (autor)
Ramsey Willoquet, Janine M. (autor)
Rojas, Julio C. (autor)
Nota: Acceso electrónico sólo para usuarios de ECOSUR
Contenido en: Medical and Veterinary Entomology. Vol. 32, no. 1 (March 2018), p. 102–110. ISSN: 0269-283X
No. de sistema: 58779
Tipo: Artículo
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"The behavioural and electrophysiological (electroantennography) responses of the first two instars of Triatoma dimidiata (Hemiptera: Reduviidae) Latreille to fresh and dry faecal headspace volatile extracts from fifth instar conspecific nymphs and synthetic compounds were analysed in this study. Recently emerged nymphs (3–5 days) aggregated around filter paper impregnated with dry faeces and around filter paper impregnated with extracts from both fresh and dry faeces. Older first instars (10–15 days) and second instars aggregated around filter paper impregnated with fresh and dry faeces, and their respective headspace extracts. Dry faecal volatile extracts elicited the strongest antennal responses, followed by fresh faecal extracts. Gas chromatography−mass spectrometry analysis of dried faecal headspace volatiles demonstrated the presence of 12 compounds: 2-ethyl-1-hexanol, 1,2,4-trimethylbenzene, n-octadecane, n-nonadecane, n-eicosane, n-heneicosane, n-tricosane, n-pentaeicosane, n-hexaeicosane, n-octaeicosane, nonanal, and 4-methyl quinazoline. In fresh faecal headspace extracts, only nonanal was clearly detected, although there were other trace compounds, including several unidentified sesquiterpenes. Four of the 11 compounds tested individually elicited aggregation behaviour at concentrations of 100 ng/μL and 1 μg/μL. A blend containing these four components also mediated the aggregation of nymphs. These volatiles may be valuable for developing monitoring methods and designing sensitive strategies to detect and measure T. dimidiata infestation."


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