Master of Science, Amsterdam Municipal University, 1957. Doctor of Philosophy, Amsterdam Municipal University, 1961.
Researcher, Institute Plant Protection Research, Wageningen, The Netherlands, 1956-1961;
researcher, lecturer, professor ecological plant pathology, Wageningen Agricultural U., 1961-1994;
Dean of the School of Agriculture, Wageningen University, 1972-1975. Chair biology section Netherlands Science Foundation, 1984-1986. Deputy member Board for Registration of Pesticides, The Netherlands, 1993-1997.
Member ReleaseCom. Genetically Modified Organism, The Netherlands, 1990-1999.
(The main body of this book is divided into four sections ...)
Fellow American Phytopath.
Married Jacoba Cornelia van Heuven, July 9, 1963. Children: Judith M., Gideon J., Ruth N., Abel P.