Founding Executive Director, University of California, Davis; President Emeritus, Donald Danforth Plant Science Center, St. Louis, MO; Professor, Department of Biology, Washington Univ., St. Louis. Former director Natl. Inst. of Food and Agriculture, US Dept. of Agriculture. Education: BA in biology (1966) Goshen College, Indiana; PhD in plant pathology (1973) Michigan State Univ., East Lansing. Previous academic positions: Washington Univ., St. Louis, Missouri; Scripps Research Institute, La Jolla, CA. Member, US National Academy of Science; Fellow, AAAS and Academy of Microbiology; Foreign Fellow, National Academy of Sciences of India and Indian National Science Academy. Awards include the Wolf Prize in Agriculture; Dennis Robert Hoagland Award, American Society of Plant Biologists; Scientist of the Year, R and D Magazine; and Ruth Allen Award, American Phytopathological Society.