1. Agroscope Changins-Wädenswil ACW, Plant Protection Division, CH-8820 Wädenswil
2. Mabritec AG, Lörracherstrasse 50, Postfach 320, CH-4125 Riehen
3. Istituto Cantonale di Microbiologia, Microbial Ecology Group, Microbiology Unit, BIVEG Department UNIGE, Via Mirasole 22, CH-6500 Bellinzona, Switzerland