| January 2011 Evaluating the use of Torymus sinensis against the chestnut gall wasp Dryocosmus kuriphilus in the Canton Ticino, Switzerland Authors Aebi Alexandre, Agroscope ART Schoenenberger Nicola, Tulum SA and Bigler Franz, Agroscope ART Torymus sinensis against the chestnut gall wasp Dryocosmus kuriphilus | January 2011 1 Zürich/Caslano, January 2011 Authors’ affiliation: Alexandre Aebi and Franz Bigler Nicola Schoenenberger Agroscope Reckenholz-Tänikon TULUM SA Research Station ART Via Rompada 40 Biosafety 6987 Caslano Reckenholzstrasse 191 Switzerland 8046 Zürich Tel: +41 91 606 6373 Switzerland Fax: +41 44 606 6376 Tel: +41 44 377 7669
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[email protected] This work was financed by the Swiss Federal Office for the Environment (FOEN) This work was done in collaboration with B. Bellosi and E. Schaltegger (TULUM SA) Cover figure: Empty chestnut gall in Stabio, February 2010 (Picture:TULUM SA) All maps used in figures and appendices (except Fig. 6): ©swisstopo, license number: DV053809.1 Map in figure 6: © Istituto Geografico, De Agostini 1982–1988 ISBN 978-3-905733-20-4 © 2010 ART 2 Torymus sinensis against the chestnut gall wasp Dryocosmus kuriphilus | January 2011 Table of contents Table of contents Abstract 5 1. Introduction 6 2. Mission and methods 7 3. Presence and degree of infestation of Dryocosmus kuriphilus in Switzerland 9 4. Invasion corridors of Dryocosmus kuriphilus towards Switzerland 11 5. Potential economic and ecological damage caused by Dryocosmus kuriphilus in Switzerland 14 6. Release of the parasitoid Torymus sinensis in the Piedmont Region, Italy 17 7. Potential benefits and damage due to the release of Torymus sinensis 18 8.