1. Biogeco, INRA; University of Bordeaux; F-33610 Cestas France
2. INIAV IP; Avenida da República, Quinta do Marquês, 2780-157 Oeiras Portugal
3. INRA, UR633 Zoologie Forestière; F-45075, Orléans France
4. CIRAD, UR Bioagresseurs, Campus International de Baillarguet; 34398 Montpellier France