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Applying Phytophthora ramorum Inoculum to Hosts: A New Method That Simulates Overhead Irrigation

L. Rollins, M. Elliott, and G. Chastagner

June 2015


The inoculum threshold for Phytophthora ramorum in irrigation water required for infection of plant material was investigated using a novel pressurized device designed to deliver zoospore inoculum in a way that simulated certain aspects of overhead irrigation. The results of the current research may assist nursery managers, property owners, and regulatory agencies in assessing the risk of using P. ramorum infested water for irrigation within nurseries and private landscapes.


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