Pia Barklund

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Currently, massive dieback of Fraxinus excelsior is observed in countries of eastern, northern and central Europe, and the reasons for it are unclear. The aims of the present work were (a) to study fungal communities in declining F. excelsior crowns; (b) to clarify role of fungi in the decline. Shoots from symptomatic crowns were collected in four(More)
Ash dieback is a recent widespread disease on ash (Fraxinus sp.) that is causing important economic and ecological losses throughout Europe. The disease is initiated by the ascomycetous fungus Hymenoscyphus pseudoalbidus (anamorph Chalara fraxinea). The main aim of this study was to investigate seasonal pattern of lesion development associated with ash(More)
A revised Swedish forest health assessment system is presented. The assessment system is composed of several interacting components which target information needs for strategic and operational decision making and accommodate a continuously expanding knowledge base. The main motivation for separating information for strategic and operational decision making(More)
Microsatellite markers were developed as an identification tool and for analysis of the genetic variation in the pathogens Cronartium flaccidum and Peridermium pini, causing Scots pine blister rust in Pinus spp. Six reference aeciospore samples from Finland were used to examine genetic differences between the two pathogens. Genetic variation within and(More)
Die Hauptbaumarten in Schweden sind Fichte und Kiefer. Seit kurzem sind Fichtenschäden aufgetreten, die man über weite Strecken transportierten Luftverunreinigungen anlastete. Die Frage ist bis heute nicht endgültig beantwortet. Dagegen hat man auch in Schweden Erfahrungen mit lokalen Schäden durch industrielle Emissionen sammeln können. Solche Schäden(More)
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