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Abstract
Many nursery plants are known to be hosts of
Phytophthora ramorum or to be associated with this pathogen. These plants can be infected or merely infested by
P. ramorum and with or without symptoms. The pathogen has been detected most frequently on container-grown nursery plants, and occasionally has been found in the container mix around these plants. Because of this close association with container-grown nursery plants,
P. ramorum can be disseminated within a nursery, among local nurseries, and between nurseries in different states on infected plants or infested materials. Pathogen propagules can be moved readily from nurseries or landscapes to natural ecosystems in soil and water. Therefore, a major concern is that
P. ramorum will be introduced into nurseries in the eastern United States (U.S.) and then will become established in forests and other natural areas where environmental conditions are favorable for pathogen survival and reproduction and susceptible plants are present. Consequently, we have been cooperating with the U.S. Department of Agriculture, Animal and Plant Health Inspection Service (USDA APHIS) to monitor for
P. ramorum in soil and water at retail nurseries in the southeastern U.S. when infected plants have been found by routine surveys.
Parent Publication
Citation
Jeffers, Steven N.; Hwang, Jaesoon; Wamishe, Yeshi A.; Oak, Steven W. 2010. Detection of Phytophthora ramorum at Retail Nurseries in the Southeastern United States. In: Frankel, Susan J.; Kliejunas, John T.; Palmieri, Katharine M. 2010. Proceedings of the Sudden Oak Death Fourth Science Symposium. Gen. Tech. Rep. PSW-GTR-229. Albany, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station. pp. 69-71
