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Importance of rainfall and sprinkler irrigation in supporting sporulation, spread of inoculum in runoff-water, and new infections of Phytophthora ramorum under field conditions

Formally Refereed
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Abstract

If a nursery plant infected with Phytophthora ramorum is introduced in a non-infested area, then it is important to understand what environmental conditions could lead spread and infection of new hosts. Once an infected nursery plant is introduced in a nursery or landscape, moving water sources, such as from rain and irrigation events, could provide an important means for dispersal and infection of new hosts. We evaluated seasonal environmental factors and associated rainfall and irrigation events that could support sporulation, dispersal, and infection of new hosts under field conditions.

Parent Publication

Citation

Tjosvold, Steve; Chambers, David; Fichtner, Elizabeth. 2010. Importance of Rainfall and Sprinkler Irrigation in Supporting Sporulation, Spread of Inoculum in Runoff-Water, and New Infections of Phytophthora ramorum Under Field Conditions. 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. 76-77 If a nursery plant infected with Phytophthora ramorum is introduced in a non-infested area, then it is important to understand what environmental conditions could lead spread and infection of new hosts. Once an infected nursery plant is introduced in a nursery or landscape, moving water sources, such as from rain and irrigation events, could provide an important means for dispersal and infection of new hosts. We evaluated seasonal environmental factors and associated rainfall and irrigation events that could support sporulation, dispersal, and infection of new hosts under field conditions.