1. Department of Entomology, Institute of Plant Protection; Agricultural Research Organization, The Volcani Center; 68 HaMaccabim Road, Rishon LeZion PO Box 15159, 7505101 Israel
2. Institute of Agroecology and Plant Health, Robert H. Smith Faculty of Agriculture; Food and Environment, Hebrew University of Jerusalem; PO Box 12, Rehovot 76100 Israel