THIS COURSE IN IN THE DEVELOPMENTAL STAGE. There is only experimental content at this point. This course will significantly increase the profitability and sustainability of the green industry, enhance the aesthetic value of recreational parks and landscapes, and imporove consumer satisfaction. It also will reduce the risk of unintentional dissemination of quarantine pathogens (e,g., Phytophthora ramorum) through trade of ornamental plant stocks. These benefits can and will extend to other specialty crop industries facing the same crop health and water issues. Course participants will learn about diversity, aquatic biology, detection technology and management strategies of plant pathogens in irrigation water.