James Downer, Ph.D.
Dr. Downer has 37 years of experience as a horticulture and plant pathology Advisor with the University of California Cooperative Extension in Ventura County. His academic training is from California Polytechnic Univ., Pomona, (BSc. horticulture & botany, 1981; MSc. Biology, 1983;in 1998 he earned a Ph.D. in plant pathology, from University of California, Riverside. Dr. Downer’s research is focused on mulch, soil microbiology and disease suppression in mulched soils, diseases of shade trees and cultural practices to maintain landscape plants. He is a member of the American Society of Horticultural Science, the American Phytopathological Society, The International Soc. of Arboriculture (ISA), and the Western Chapter of the ISA (WCISA), Dr. Downer is an adjunct professor at California Polytechnic University in Pomona. He serves on the Board of the John Britton Fund for tree Research as the chair of the research advisory committee, and currently serves on the education committee for WCISA. Dr. Downer has a love of shade trees, Shinrin roku (forest bathing/walking) tree work, wood working, horses, gardening, horticulture and the study of plants and their biology. He resides in Ojai, CA and Portal, AZ.
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