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Title: Phytophthora ramorum in coast live oak: search for resistance and mechanisms.

Author: McPherson, B.A.; Wood, D.L.; Mori, S.R.; Conrad, A.; Bonello, P.;

Date: 2013

Source: In: Frankel, S.J.; Kliejunas, J.T.; Palmieri, K.M.; Alexander, J.M. tech. coords. Proceedings of the sudden oak death fifth science symposium. Gen. Tech. Rep. PSW-GTR-243. Albany, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station: p. 88.

Publication Series: General Technical Report (GTR)

   Note: This article is part of a larger document. View the larger document

Description: Despite the presence of Phytophthora ramorum in northern and central California forests since at least 1994, asymptomatic coast live oaks (Quercus agrifolia Née) still remain in heavily infested stands. Coast live oak infection and mortality rates of 5 percent y-1 and 3 percent y-1, respectively, observed in long-term monitoring plots in Marin County, California give no indication that individual trees appear to evade infection. In some study plots, more than 50 percent of the mature coast live oaks have died since 2000.

Keywords: Sudden oak death, Phytophthora ramorum, invasive species, tanoak, Notholithocarpus densiflorus, coast live oak, Quercus agrifolia, Japanese larch, Larix kaempferi

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McPherson, B.A.; Wood, D.L.; Mori, S.R.; Conrad, A.; Bonello, P. 2013. Phytophthora ramorum in coast live oak: search for resistance and mechanisms. In: Frankel, S.J.; Kliejunas, J.T.; Palmieri, K.M.; Alexander, J.M. tech. coords. Proceedings of the sudden oak death fifth science symposium. Gen. Tech. Rep. PSW-GTR-243. Albany, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station: p. 88.

 


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