Abstract
Increasing damages caused by fungal-like, soil borne Phytophthora-species have been observed on several tree species in Southern Sweden. Experiences from other countries demonstrate that these introduced pathogens can reduce the productivity of forest ecosystems in the long term. Thus, they can venture the cost-effectiveness of Swedish forestry. Consequently, there is an urgent need to improve the scientific knowledge based for management of Phytophthora-damages in Swedish conditions. To meet this need we suggest research that will employ a unique *genes-to-landscape* approach, based on technical advances in molecular biology that will reveal the patterns of species distribution, and genetic diversity of invasive Phytophthora spp. populations associated with production and recreation forests, parks, amenity plantings, nurseries and protected areas. The work is based on our ongoing studies and established contact networks. Citizens and stakeholders have shown great interest in Phytophthora-damages and we will channel their interest into a Citizen Science initiative with aim at systematic collection of samples and interactive dissemination of results. The project delivers new scientific information and an open interactive database with information about spreading of Phytophthoras. The long term effect is reduced impact of Phytophthora-damages in Swedish forests.
Sweden