0000000000463755

AUTHOR

Guarino Salvatore

Il ruolo dei semiochimici nella gestione delle infestazioni del punteruolo rosso delle palme

A distanza ormai di più di dieci anni dall’arrivo del Punteruolo rosso delle palme Rhynchophorus ferrugineus sul territorio nazionale, molteplici sono stati gli approcci tecnico-scientifici messi in atto per arginare il dilagare delle cruente infestazioni. Ad oggi, tuttavia, nessuna delle strategie di contenimento adottate è risultata funzionale e realmente efficace a contrastare l’azione distruttiva del coleottero nei confronti del patrimonio palmicolo che caratterizza l’arredo urbano e monumentale di molte città italiane. Infatti, la natura criptica del Punteruolo rosso delle palme, da un lato ha reso difficile eseguire una diagnosi precoce poiché nei primi stadi di infestazione la sintom…

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

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 t…

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Electrophysiological and behavioral studies to test attractants semiochemicals for Stegobium paniceum L. (Coleoptera: Anobiidae)

Stegobium paniceum (L.) (Coleoptera: Anobiidae), the drugstore beetle, is one of the major pests for a wide variety of dry and durable stored agricultural products. Females of S. paniceum produce a sex pheromone, (2S,3R,1'R)-Stegobinone, that attracts males. Nevertheless, trapping experiments using the synthetic sex pheromone in many cases showed low levels of captures, perhaps because of isomerization of the pheromone compound in ambient conditions. To date, very few brands of commercially S. paniceum pheromone are available in the market. In this study, we evaluated in electrophysiological (EAG) and behavioral bioassays (two-choice olfactometer), the response of S. paniceum male and femal…

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