Grogan spent his entire career at the University of California, Davis, after studying under J. C. Walker. He developed an innovative, diverse, and creative research program that included foliar and soilborne diseases of vegetable crops caused by viruses, bacteria, fungi, and abiotic factors. He solved problems like necrotic disease of bean, seed transmission of the halo blight pathogen in bean, June yellows and big-vein in lettuce, and many more. Grogan is a classical plant pathologist who shared with his students the excitement and fun of solving complex disease problems. He is an APS fellow and received the APS Award of Distinction in 1987.
(Submitted for publication in July 2008.)