Distribution of and damages by Dutch elm disease agents in Northeastern Europe ; Jalakasurma tekitajate levik ja kahjustused Kirde-Euroopas

A Thesis for applying for the degree of Doctor of Philosophy in Forestry. ; As elsewhere in the world, elms in Northeastern Europe are threatened by Dutch elm disease (DED), which is one of the most devastating diseases of the elms. The aim of the doctoral thesis was to investigate the spread of Dutch elm disease, its agents and their impact on the health status of different elms, vectors and the health of the elms in different habitats in Estonia and North-West Russia. The results of the work demonstrated that U. glabra is more susceptible to DED than U. laevis and elm hybrids. Therefore, we... Mehr ...