Entomologia Generalis (2018) 37, 93-101

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Pasquale Cascone, Simona Carpenito, Luigi Iodice, Sonia Raimo and Emilio Guerrieri (2018)
Introduction and acclimation of Torymus sinensis in the south of Italy
Entomologia Generalis 37 (2), 93-101
Abstract: The Asian Gall Wasp Dryocosmus kuriphilus was accidentally introduced into Italy in 2004. Since then it has spread all over the peninsula where chestnut represents an economic important fruit crop. In 2005 the pest arrived in Campania, where about 40% of Italian and 25% of European chestnut production is concentrated, with devastating consequences. For its control, the exotic parasitoid Torymus sinensis has been introduced from 2009 onward, but so far no survey has been completed to assess its acclimation and, most of all, the level of its activity. In this note data on releasing sites and parasitism rate for the control of D. kuriphilus in Campania are reported. We show that the parasitoid well established in a region characterized by mild winters and warm summers, reaching a good level of presence in several sites of the main area of chestnut production which is concentrated in the provinces of Avellino and Salerno. We confirmed the ability of this parasitoid in moving away from releasing sites following its host. In fact, its presence was recorded in an area where only one release was performed. As expected, the larger releases were followed by higher parasitism rates with some exceptions. The presence and activity of T. sinensis recorded had played a pivotal role in the drastic reduction of D. kuriphilus in Campania within only 5 years from the application of a territorial biocontrol program supported by the local government. Information reported are useful for future AGW management.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Emilio Guerrieri, Pasquale Cascone

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
classical biocontrol/new introduction

Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.

Dryocosmus kuriphilus Chestnut (Castanea) Italy
Torymus sinensis (parasitoid) Dryocosmus kuriphilus Chestnut (Castanea) Italy