Biology and monitoring of Dryocosmus kuriphilus on Castanea sativa in Southern Italy

Authors

  • Umberto Bernardo,

    Corresponding author
    1. Istituto per la Protezione delle Piante, Consiglio Nazionale delle Ricerche, Via Università 133, 80055 Portici, Italy
    Search for more papers by this author
  • Luigi Iodice,

    1. Istituto per la Protezione delle Piante, Consiglio Nazionale delle Ricerche, Via Università 133, 80055 Portici, Italy
    Search for more papers by this author
  • Raffaele Sasso,

    1. Istituto per la Protezione delle Piante, Consiglio Nazionale delle Ricerche, Via Università 133, 80055 Portici, Italy
    2. ENEA Centro Ricerche Casaccia “UTAGRI - ECO”, Via Anguillarese 301, 00123 Santa Maria di Galeria, Roma, Italy
    Search for more papers by this author
  • Valerio A. Tutore,

    1. Istituto di Ricerche sulle Attività Terziarie - CNR, Via M. Schipa 91, 80122 Napoli, Italy
    2. Dipartimento di Matematica e Statistica, Università degli Studi di Napoli ‘Federico II’, Via Cintia, 80126 Napoli, Italy
    Search for more papers by this author
  • Pasquale Cascone,

    1. Istituto per la Protezione delle Piante, Consiglio Nazionale delle Ricerche, Via Università 133, 80055 Portici, Italy
    Search for more papers by this author
  • Emilio Guerrieri

    1. Istituto per la Protezione delle Piante, Consiglio Nazionale delle Ricerche, Via Università 133, 80055 Portici, Italy
    Search for more papers by this author

Umberto Bernardo. Tel.: +3 908 177 53658; fax: +39 081 775 5872; e-mail: bernardo@ipp.cnr.it

Abstract

  • 1The cynipid gall wasp Dryocosmus kuriphilus Yasumatsu (Hymenoptera: Cynipidae) is an invasive wasp in Europe and is one of the major pests of chestnuts worldwide. An investigation of this cynipid was started in Campania, Southern Italy, in 2008, with the aim of providing guidelines for its sustainable control.
  • 2The number of larvae/gall increased in the second year of colonization relative to the first one but thereafter decreased in the third year of colonization, whereas the volume of the galls after the initial increase in the second year of colonization became stable. Adult emergence generally peaked between the middle of June and July.
  • 3The only reliable method for assessing the presence of the pest at its earliest stage was through dissecting the buds because oviposition scars on the buds tended to disappear during the winter.
  • 4Yellow traps were shown to be an effective method for assessing the emergence of cynipid adults and could potentially be used to time chemical applications in those cases in which this control method is feasible.
  • 5No correlation was recorded between the relative durations of the final stages (pupae, pharate adults and emergence).
  • 6Possible control strategies for this invasive pest are discussed.

Ancillary