Links to other useful resources:
American Phytopathological Society (APS)
American Seed Trade Association (ASTA)
International Seed Federation (ISF) - Differential Hosts
Community Plant Variety Office (CPVO)
International Union for the Protection of New Varieties of Plants (UPOV)
GEVES MATREF - French Reference Materials
Plantum Isolate Collection - Dutch Reference Materials
International Bremia Evaluation Board (IBEB)
National Institute of Agricultural and Food Research and Technology (INIA) - Spain
Emerging Viruses of Cucurbits Working Group
USDA-ARS Germplasm Resources Information Network (GRIN)
USDA-ARS National Lab for Genetic Resources Preservation (NLGRP)