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Laboratory and field evaluation of acetic acid-based lures for male Asian citrus psyllid, Diaphorina citri.

  • Author(s): Zanardi, Odimar Z
  • Volpe, Haroldo XL
  • Luvizotto, Rejane AG
  • Magnani, Rodrigo F
  • Gonzalez, Francisco
  • Calvo, Carolina
  • Oehlschlager, Cameron A
  • Lehan, Benjamin J
  • Esperança, Victoria
  • Delfino, Jennifer Y
  • de Freitas, Renato
  • de Carvalho, Rômulo Igor
  • Mulinari, Tatiana Aparecida
  • Miranda, Marcelo P
  • Bento, José Mauricio S
  • Leal, Walter S
  • et al.

The Asian citrus psyllid (ACP) is a vector of a pathogen associated with greening and thus a major problem in citriculture worldwide. Lures are much needed for improving ACP trapping systems for monitoring populations and surveillance. Previously, we have identified acetic acid as a putative sex pheromone and measured formic acid- and propionic acid-elicited robust electroantennographic responses. We have now thoroughly examined in indoor behavioral assays (4-way olfactometer) and field tests the feasibility of these three semiochemicals as potential lures for trapping ACP. Formic acid, acetic acid, and propionic acid at appropriate doses are male-specific attractants and suitable lures for ACP traps, but they do not act synergistically. An acetic acid-based homemade lure, prepared by impregnating the attractant in a polymer, was active for a day. A newly developed slow-release formulation had equal performance but lasted longer, thus leading to an important improvement in ACP trap capture at low population densities.

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