Ophiostoma novo-ulmi (Dutch Elm Disease)

CuPC33 Lab Test:                  Positive

Dutch elm disease is one of the most serious tree diseases in the world. It is caused by two related species of fungi in the genus Ophiostoma which are disseminated by various elm bark beetles. This disease killed 25 million elms in the UK in the 1960-70s. Incidence is again on the increase, especially in Scotland and our remaining elms are at risk.