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Spread and development of Phytophthora ramorum in a California christmas tree farmAuthor(s): Gary A. Chastagner; Kathy Riley; Norm Dart
Source: In: Frankel, Susan J.; Kliejunas, John T.; Palmieri, Katharine M., tech. coords. 2008. Proceedings of the sudden oak death third science symposium. Gen. Tech. Rep. PSW-GTR-214. Albany, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station. pp. 199-200
Publication Series: General Technical Report (GTR)
Station: Pacific Southwest Research Station
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DescriptionThe risk of conifers being infected by Phytophthora ramorum under natural conditions is poorly understood. In California, infected conifers commonly occur as understory plants beneath or adjacent to heavily infected plants like California bay laurel (Umbellularia californica). During wet periods, P. ramorum is known to produce a copious amount of spores from spots on infected leaves of this epidemiologically-important host. In Oregon, infection on California bay laurel is limited and infection of Douglas-fir (Pseudotsuga menziesii) trees has been limited to a few seedlings directly beneath infected tanoak (Lithocarpus densiflorus) trees in the regulated area in Curry County.
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CitationChastagner, Gary A.; Riley, Kathy; Dart, Norm. 2008. Spread and development of Phytophthora ramorum in a California christmas tree farm. In: Frankel, Susan J.; Kliejunas, John T.; Palmieri, Katharine M., tech. coords. 2008. Proceedings of the sudden oak death third science symposium. Gen. Tech. Rep. PSW-GTR-214. Albany, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station. pp. 199-200
KeywordsPhytophthora ramorum, Pseudotsuga menziesii, Abies grandis, conifers, epidemiology, spread
- Suppression of Phytophthora ramorum infestations through silvicultural treatment in California's north coast
- Five years of monitoring infection and mortality in redwood tanoak forests
- Comparison of the recovery of Phytophthora ramorum from tanoak and California bay laurel, and the potential recovery of inoculum in fog
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