Author Bio

Dr. Chieri Kubota is a professor in the Department of Horticulture and Crop Science, the Ohio State University. Dr. Kubota received Ph.D. in Horticultural Engineering and M.S. in Horticultural Science from Chiba University, Japan. Dr. Kubota worked as faculty for 6 years in Chiba University, 16 years in the School of Plant Sciences at University of Arizona and recently (in 2017) joined the faculty at the Ohio State University. Her research program focuses on the development of science-based technologies in the area of controlled environment agriculture (CEA). Dr. Kubota’s research includes value-added CEA crop production, vegetable grafting, hydroponic strawberry production, as well as LED lighting applications. Root zone dynamics and management of high-wire tomatoes Chieri Kubota, Department of Horticulture and Crop Science, The Ohio State University High-wire tomato plants are typically grown in a soilless culture system consisting of a horticultural substrate contained within a slab (bag) or other container that defines the root zone and drip irrigation to deliver nutrient solution. Monitoring EC, pH and volume of drip (influx) and drain (efflux) solutions must be done at least on a daily basis. Nutrient solutions, timing of first and last irrigation of the day are adjusted based on the plant physiological status, growth stage, and nutrient uptake. Basics and applications of root zone management will be presented in this talk. Latest advances in transplant propagation methods and technology - Parameters for indoor grown grafted plants Chieri Kubota, Department of Horticulture and Crop Science, The Ohio State University Concepts of closed transplant production with sole source electrical lighting and CO2 enrichment were developed in the 1990s. Since early 2000s, grafting nurseries in Japan began to introduce closed transplant production facilities for producing scion and rootstock seedlings used for tomato grafting. Advantages of using such a totally controlled environment in grafting plant propagation include consistent (therefore predictable) plant growth rate and a highly contained environment to lower the risk of pathogens. It is also expected to increase the grafting success rate when automated grafting is utilized. This presentation provides an overview of the key environmental parameters specific to growing high quality scion and rootstock plants for vegetable grafting.