Chemical Signaling Between Guava (Psidium guajava L., Myrtaceae) and the Guava Weevil (Conotrachelus psidii Marshall)

  • Alicia Romero-Frías Universidad Nacional de Colombia Sede Bogotá
  • José Maurício Simões-Bento Universidade de São Paulo
  • Coralia Osorio Universidad Nacional de Colombia Sede Bogotá
Palabras clave: Semiochemicals, behavioral response, guava VOCs

Resumen

Volatile organic compounds (VOCs) from guava (Psidium guajava L.) reproductive tissues (flower bud, open flower, petal fall, fruit setting, and fruit growth) were collected in situ during the day by headspace-solid phase microextraction (HS-SPME), and from flower bud and fruit setting by dynamic headspace (DHS). The samples were analyzed by GC-MS to separate and identify VOCs produced by guava, which potentially could attract the guava weevil (Conotrachelus psidii Marshall, Coleoptera: Curculionidae), one of the most important pests of guava plants in Colombia and Brazil. The terpenes β-caryophyllene, limonene, and copaene (tentatively identified) were present in all of the guava reproductive tissues, being the major constituents in flower bud and fruit setting, the two guava stages where C. psidii is commonly found. Additionally, the volatile compounds released by male and female insects were separately collected by HS-SPME, and comparatively analyzed by GC-MS. As result, some of volatile detected in the guava reproductive tissues were also released from insects. The behavioral response of the volatile blends and the above-mentioned compounds was studied in a Y-tube olfactometer bioassay, allowing confirming the presence of host kairomones in the guava reproductive tissues.

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Cómo citar
Romero-Frías, A., Simões-Bento, J. M., & Osorio, C. (2015). Chemical Signaling Between Guava (Psidium guajava L., Myrtaceae) and the Guava Weevil (Conotrachelus psidii Marshall). Revista Facultad De Ciencias Básicas, 11(1), 102-113. https://doi.org/10.18359/rfcb.384
Publicado
2015-01-31
Sección
Artículos