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

B.A. McPherson; D.L. Wood; Sylvia Mori; A. Conrad; P. Bonello

Treesearch

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

Informally Refereed

Authors:

B.A. McPherson, D.L. Wood, Sylvia Mori, A. Conrad, P. Bonello

Year:

2013

Type:

General Technical Report

Station:

Pacific Southwest Research Station

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.

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Abstract

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.

Parent Publication

Proceedings of the sudden oak death fifth science symposium

Keywords

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

Citation

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.