Met Office scientists protecting our forests from pests and pathogens
). Year (since 1971) New tree pest or pathogen outbreak 1971 Dutch elm disease 1983 Great spruce bark beetle 1984 Phytophthora alni 1995 Gypsy moth 1997 Dothistroma needle blight 2002 Phytophthora ramorum 2002 Horse chestnut leaf miner 2003 Phytophthora kernoviae 2005 Bleeding canker