Risk Analysis for Biological Control: A Dutch Case Study in Biocontrol of Prunus serotina by the Fungus Chondrostereum purpureum. M. O. de Jong, Centre for Agrobiological Research (CABO), P.O. Box 14,6700 AA Wageningen, Netherlands. P.C. Scheepens. Centre for Agrobiological Research (CABO), P.O. Box 14,6700 AA Wageningen, Netherlands; J. C. Zadoks Department of Phytopathology, P.O. Box 8025,8700 EE Wageningen, Netherlands. Plant Dis. 74:189-194. Copyright 1990 The American Phytopathological Society. DOI: 10.1094/PD-74-0189.