Ekspresowa Analiza Zagrożenia Agrofagiem: Gremmeniella abietina

Gremmeniella abietina is a ascomycota that causes dangerous shoot dieback in coniferous trees, particularly in Scots pine (P. sylvestris) and black pine (P. nigra). The pathogen has been found almost all over Europe, including Poland. The fungus attacks crops, young trees, snags and older stands. Poland has a wide range of host plants, which make up a significant percentage of the species composition of the country's forests. The risk of the pathogen entering the PRA, given the phytosanitary and control measures taken, has been determined as medium/low. If G. abietina appears on sites where it has not been recorded so far, stands with host plants may be infected. Special attention should be paid to protection in the context of trees of the genus Pinus (mainly P. sylvestris), the most widely cultivated genus in forestry and of great economic and ecosystem importance. In case of penetration and further colonization, there is a risk of spreading the pathogen due to the widespread availability of hosts, planted over large areas in monocultures (forestry). This guarantees constant access to host plants and facilitates the movement of the fungus from plant to plant, thus mastering new areas. It is advisable to monitor plantations, especially forest nurseries and young trees, and when symptoms indicating the presence of the pathogen are found, it is necessary to carry out fungicide spraying or eliminate infected specimens and their remains. Chemical treatments should be carried out using registered fungicides dedicated to the control of G. abietina in crops of specific plants. Young imported trees should be free of disease symptoms and inspected, as should trees intended for Christmas trees and wood products.