Since 2006 a large group of elms have been injected yearly with DutchTrig®. These trees are located on an Island in the Elbe River where many people gather to enjoy warm sunny days. The elms on the island form an important part of the backdrop and atmosphere.

Methods

There are six areas of work in the Hamburg Elm Program:

• mapping and registration of elms
• monitoring the elm population for disease symptoms
• sanitation of infected trees
• vaccination of elms using the DutchTrig®
• replanting elms
• professional training courses and public relations work

Success

Since 2008, one out of seven city districts is free of Dutch Elm Disease, while the rate of occurrence was below 1% in a further three districts.