Thousand cankers disease in Europe: an overview

摘要: Walnut (Juglans regia L.) is traditionally present in most European countries as an ornamental tree, and Southern Europe particular it grown for both fruit wood. Since the 1980s, to supply increasing demand walnut timber, large areas of southern central Europe, from France Hungary, have been planted with black nigra provide wood furniture production. The fungus Geosmithia morbida its vector Pityophthorus juglandis, causing thousand cankers disease USA last 2 decades, were recently reported (in Italy) on species. Thousand can a high negative impact landscape economy many agricultural forest areas. Following detailed pest risk analysis performed by EPPO 2015, organisms included A2 List pests recommended regulation quarantine pests. main biological, epidemiological monitoring aspects status are reported.