A new component of the male papaya fruit fly (Diptera: Tephritidae) sex pheromone
Keywords:
ethenylpyrazine, papaya fruit fly, GC-MS, EAGAbstract
In addition to the major component, 2-methyl-6-vinylpyrazine, 2,5-dimethyl-3-vinylpyrazine was collected as a minor component from calling male papaya fruit flies Toxotrypana curvicauda Gerstaecker (Diptera: Tephritidae). Volatile chemicals emitted by calling males were identified by gas chromatography/mass spectrometry detector analyses. Attraction response was verified by wind tunnel bioassays for the male volatile collections and for both synthetic pyrazines. The percentages of attraction to the source caused by each pyrazine were similar to those caused by the male volatile collection; however, only a blend of the pyrazines resulted in a similar percentage of landings on the source.
Además de la 2-metil-6-vinilpirazina, se identificó la 3-etenil-2,5-dimetilpirazina en extractos de las emisiones de machos de moscas de la fruta de papaya Toxotrypana curvicauda Gerstaecker (Diptera: Tephritidae) utilizando análisis por cromatografía de gases acoplada a espectrometría de masas. También, se verificó la actividad biológica mediante bioensayos en túnel de viento con las pirazinas sintetizadas, comparadas con el extracto de las emisiones de machos, donde los porcentajes de atracción a la fuente; fueron similares. Sin embargo, sólo la mezcla de las dos pirazinas resultó en aterrizaje en la fuente, como el provocado por el extracto de las emisiones de machos.
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