Phytophthora root and stem rot – new disease of Ilex aquifolium "Myrtifolia” in Poland

Leszek B. Orlikowski, Grażyna Szkuta

Abstract


Phytophthora cinnamomi was often isolated from rotted roots and stems of English holly "Myrtifolia" together with Alternaria alternata, Cylindrocarpon destructanss, Fusarium avenaceum and other fungal species. Inoculation of leaf blades and stem parts of 4 species and 12 holly cultivars with P. cinnamomi showed the spread of rot symptoms on the most of them. On Ilex crenata tissues necrosis did not develop or spread slowly. Isolation of P. cinnamomi only from one holly cultivar in surveyed nursery indicate on transmission of the pathogen with imported young plants.

Keywords


Phytophthora cinnamomi;; occurrence; isolation; colonisation; cultivars

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