Stegobium paniceum (L.) (Coleoptera: Anobiidae), also named drugstore beetle, is one of the major pests for a wide variety of dry and durable stored products. Females of this species produce a sex pheromone, (2S,3R,1’R)-Stegobinone that attracts males and elicit precopulatory searching behaviour. However, (2S,3R,1’R)-Stegobinone has eight possible isomers which are produced during its chemical synthesis and one of them inhibiting the pheromone activity, the (2S,3R,1'S)-Stegobinone form. In addition, the high costs of synthesis of (2S,3R,1’R)-Stegobinone suggest that alternative volatile compounds (e.g. those from food or oviposition sources) might be considered as attractant for traps. In this study the adult responses to racemic mixtures, containing the sex pheromone and/or its isomers, and to an elution from a dynamic headspace collection of a S. paniceum colony were assessed in electrophysiological (EAG) and behavioral bioassays (two-choice olfactometer). Racemic mixtures were: (2S,3R,1’R)-Stegobinone plus the form 2R,3S,1’S (mixture A) and (2S,3R,1’S)-Stegobinone plus the form 2R,3S,1’R (mixture B). The mixtures were tested alone or in combination. EAG results showed that both racemic mixtures elicit dose-dependent responses in males but not in females. Olfactometer bioassays showed attraction response of males to mixture A tested alone or in combination with B, while females were not attracted. However, mixture B alone elicited repellency in both sexes. Finally, the elution from the headspace elicited attraction in both sexes of S. paniceum. The possibility to use racemic mixture A in trap synergized by using volatiles produced from feeding and oviposition sites of this species is discussed.

Guarino, S., Peri, E., Arif, M., Braghieri, G., Zini, N., Caimi, M., et al. (2017). Electrophysiological and behavioral studies in the evaluation of semiochemical attractants for Stegobium paniceum L. (Coleoptera: Anobiidae). In Book of Abstacts (pp.28-28).

Electrophysiological and behavioral studies in the evaluation of semiochemical attractants for Stegobium paniceum L. (Coleoptera: Anobiidae)

Guarino Salvatore
;
Peri Ezio;Arif Mokhtar;Sajeva Maurizio;Zito Pietro
2017-01-01

Abstract

Stegobium paniceum (L.) (Coleoptera: Anobiidae), also named drugstore beetle, is one of the major pests for a wide variety of dry and durable stored products. Females of this species produce a sex pheromone, (2S,3R,1’R)-Stegobinone that attracts males and elicit precopulatory searching behaviour. However, (2S,3R,1’R)-Stegobinone has eight possible isomers which are produced during its chemical synthesis and one of them inhibiting the pheromone activity, the (2S,3R,1'S)-Stegobinone form. In addition, the high costs of synthesis of (2S,3R,1’R)-Stegobinone suggest that alternative volatile compounds (e.g. those from food or oviposition sources) might be considered as attractant for traps. In this study the adult responses to racemic mixtures, containing the sex pheromone and/or its isomers, and to an elution from a dynamic headspace collection of a S. paniceum colony were assessed in electrophysiological (EAG) and behavioral bioassays (two-choice olfactometer). Racemic mixtures were: (2S,3R,1’R)-Stegobinone plus the form 2R,3S,1’S (mixture A) and (2S,3R,1’S)-Stegobinone plus the form 2R,3S,1’R (mixture B). The mixtures were tested alone or in combination. EAG results showed that both racemic mixtures elicit dose-dependent responses in males but not in females. Olfactometer bioassays showed attraction response of males to mixture A tested alone or in combination with B, while females were not attracted. However, mixture B alone elicited repellency in both sexes. Finally, the elution from the headspace elicited attraction in both sexes of S. paniceum. The possibility to use racemic mixture A in trap synergized by using volatiles produced from feeding and oviposition sites of this species is discussed.
Settore AGR/11 - Entomologia Generale E Applicata
15-nov-2017
European Phd Network "Insect Science" | Giornate Culturali di Entomologia
Naples, Italy
15-18 November 2017,
VIII
2017
1
A stampa
Guarino, S., Peri, E., Arif, M., Braghieri, G., Zini, N., Caimi, M., et al. (2017). Electrophysiological and behavioral studies in the evaluation of semiochemical attractants for Stegobium paniceum L. (Coleoptera: Anobiidae). In Book of Abstacts (pp.28-28).
Proceedings (atti dei congressi)
Guarino, S.; Peri, E.; Arif, M.; Braghieri, G.; Zini, N.; Caimi, M.; Sajeva, M.; Tavella, F.; Zito, P.
File in questo prodotto:
File Dimensione Formato  
Guarino et al Naples 2017.pdf

accesso aperto

Dimensione 182.07 kB
Formato Adobe PDF
182.07 kB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10447/250685
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact