Forest Pathology (2019) 49 (6 - e12560)

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Tanay Bose, Jolanda Roux, Treena I. Burgess, Christopher Shaw and Michael J. Wingfield (2019)
Susceptibility of Eucalyptus grandis and Acacia mearnsii seedlings to five Phytophthora species common in South African plantations
Forest Pathology 49 (6 - e12560)
Abstract: Eucalyptus grandis and its hybrids, as well as Acacia mearnsii, are important non-native trees commonly propagated for forestry purposes in South Africa. In this study, we conducted pathogenicity trials to assess the relative importance of five commonly isolated Phytophthora spp. (Phytophthora alticola, P. cinnamomi, P. frigida, P. multivora and P. nicotianae) from the plantation environment on E. grandis and A. mearnsii seedlings. Overall E. grandis was more susceptible to the tested Phytophthora spp. than A. mearnsii. Phytophthora cinnamomi was the only pathogen that had a significant negative effect on both the host tree species, leading to a reduction in root and shoot weight as well as to death in the case of E. grandis. Phytophthora alticola and P. nicotianae exclusively affected E. grandis and A. mearnsii, respectively. This study updated the current knowledge on the pathogenicity of Phytophthora spp. on two important non-native commercially propagated tree species from South Africa.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Jolanda Roux, Treena Burgess, Michael J. Wingfield

Research topic(s) for pests/diseases/weeds:
general biology - morphology - evolution

Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.

Phytophthora cinnamomi Eucalypt (Eucalyptus) South Africa
Phytophthora nicotianae Acacia (crop) South Africa
Phytophthora frigida South Africa
Phytophthora alticola Eucalypt (Eucalyptus) South Africa
Phytophthora multivora South Africa