An aim of the study is to clarify, if Cronartium pini incidence can be reduced by continuous-cover forestry. Another aim is to study the spreading potential of Armillaria from deciduous trees to conifers and new means of controlling the disease. Also the ability of fungal community to compete with Heterobasidion parviporum and their usage to prevent spreading of H. parviporum to continuous-cover sites in peatlands will be studied. In addition, the usage of potential viruses as biocontrol against spreading of H. parviporum to continuous-cover sites in peatlands will be studied.
New information will be received of the occurrence of C. pini under different silvicultural practices in northern Finland. In addition, repeated measurements in permanent sample plot net will give information about the effect of the silvicultural treatments on spreading of the disease. New information will also be received of the alternate host plants that are significant for the spreading of the rust. The results accurate silvicultural parctices and controll methods against C. pini.
New information will be received of the clonal spreading of Armillaria and effect of viruses to phenotypic variation of Armillaria, which can be used in developing new controll methods against the disease. The results improves the early monitoring of the disease.
New information will be received of the effect of fungal communities to reduce spreading of H. parviporum to continuous-cover plots in peatlands. The new results provide evidence on functionality of virocontroll method in continuous-cover forests.