Biology and monitoring of Dryocosmus kuriphilus on Castanea sativa in Southern Italy
Umberto Bernardo. Tel.: +3 908 177 53658; fax: +39 081 775 5872; e-mail: email@example.com
- 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.