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Title: Foliar susceptibility of eastern oak species to Phytophthora infection

Author: Balci, Y.; Balci, S.; MacDonald, W.L.; Gottschalk, K.W.;

Date: 2008

Source: Forest Pathology. 38: 320-331.

Publication Series: Scientific Journal (JRNL)

Description: Seven different Phytophthora species were used to test the foliar susceptibility of the common eastern US oak species and understory plants to Phytophthora infection. The Phytophthora species employed were Phytophthora cambivora, Phytophthora cinnamomi, Phytophthora citricola, Phytophthora europaea, Phytophthora quercetorum, Phytophthora quercina-like and Phytophthora sp1. Inoculation of detached-leaves with agar plugs containing mycelia of Phytophthora provided an estimate of their relative susceptibility. Lesions were always greater when foliage was wounded and young. On deciduous plants, lesion sizes were considerably reduced with the increasing foliar age, although with evergreen plants lesion sizes remained similar regardless of foliar age when more aggressive isolates were tested. Infections seldom resulted when foliage was not wounded. With young and mature foliage, P. citricola usually produced the largest lesions. Young foliage of Quercus rubra was the most susceptible to infection followed by Castanea dentata for both wounded and non-wounded inoculations. Mature foliage of Hamamelis virginiana, Kalmia latifolia and Quercus alba were the most susceptible to wound and non-wound inoculations.

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Balci, Y.; Balci, S.; MacDonald, W.L.; Gottschalk, K.W. 2008. Foliar susceptibility of eastern oak species to Phytophthora infection. Forest Pathology. 38: 320-331.

 


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