Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Occurrence of Phytophthora spp. on forest trees in Slovakia.

Abstract

Phytophthora is considered to be one of the most dangerous fungal pathogen to forest trees in Slovakia. Fortunately, it is not widely distributed. It is proven, that the most damaged tree species is Castanea sativa. Phytophthora cambivora and Phytophthora cinnamomi have been found in the root system, buttress and basal trunk of Castanea sativa at several localities in southern Slovakia. The first isolates were obtained at the end of the 1970s. As Quercus spp. is planted close to those localities, the oak trees are also in danger. Seedlings of European beech are attacked by Phytophthora sp. The acuity of disease depends on soil wetness in the forest nursery. There is evidence that some Alnus trees were attacked by Phytophthora sp. and died within the last 5 years. Recently, we have suspected that several old beech trees were infected by Phytophthora cambivora, but symptoms on the bark of the trunk and buttress suggested Armillaria and Nectria infection. So far, the major forest trees such as Picea abies, Fagus sylvatica, Quercus spp., Pinus spp., Abies alba and Larix decidua are still without proven Phytophthora infection. However, ornamental trees and shrubs seem to be the main source of infection for indigenous forest trees at present.