He earned his B.S. in turfgrass science from Penn State University, an M.S. in plant, soil and insect sciences (turfgrass) from the University of Massachusetts Amherst and his Ph.D. in agronomy from Penn State University. Brosnan’s research focuses on effective and economical strategies for broadleaf and grassy weed control in various turfgrass systems, including golf courses, athletic fields, and residential landscapes. He is also interested in the effects of plant growth regulators on both warm and cool-season turfgrasses. Brosnan has previously taught conference seminars and webcasts for GCSAA