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  1. Root and aerial infections of Chamaecyparis lawsoniana by Phytophthora lateralis : a new threat for European countries

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    Author(s): C. Robin; D. Piou; N. Feau; G. Douzon; N. Schenck; E.M. Hansen
    Date: 2010
    Source: Forest Pathology
    Publication Series: Scientific Journal (JRNL)
    DOI: https://doi.org/10.1111/j.1439-0329.2010.00688.x
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    Description

    Phytophthora lateralis has been isolated from root and collar lesions in Port-Orford Cedar (POC) trees (Chamaecyparis lawsoniana) in north-western France (Brittany). These trees, planted in hedgerows, displayed symptoms similar to the typical symptoms of POC root disease. Until now, the disease has been found outside of the nurseries only in western North America. Aerial symptoms, not associated with root or collar infections, were also observed, and P. lateralis was isolated from branch lesions. Similar symptoms were previously observed only in one POC root disease site, located in the Pacific coast of Oregon where climatic conditions are similar to those occurring in Brittany. The reported aetiology as well as the morphological characteristics (deciduous sporangia) of P. lateralis suggests that this species could be air-dispersed, as described for P. ramorum, a closely related species. This outbreak of P. lateralis in Brittany in farming landscapes associated with the aerial spread of this pathogen represents a new threat for European countries.

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    Citation

    Robin, C.; Piou, D. ; Feau, N.; Douzon, G.; Schenck, N. ; Hansen, E.M. 2010. Root and aerial infections of Chamaecyparis lawsoniana by Phytophthora lateralis : a new threat for European countries. Forest Pathology no. doi: 10.1111/j.1439-0329.2010.00688.x.

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    Keywords

    Phytophthora lateralis, Chamaecyparis lawsoniana

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