Example of fungicidal injections
Private companies do provide treatment services for Dutch elm disease. This is done through injections of a fungicide at the base of the tree. These treatments are primarily preventative or therapeutic in nature, and therefore only highly-valued and specimen trees are good candidates for treatment.
An elm that is in the early stages of infection can be saved with treatment and trimming out of the infected area. Generally the rule of
thumb is less than 5 percent wilting in the canopy to be
successful. Depending on the size of the tree, an injection
can cost between $300 and $600. Injections must be done
every three years.
The City of Saint Paul does not inject public trees or assume any
costs, but will work with private property owners to stop removals
and issue a free permit if they wish to try a fungicide injection.
The permitted company then assumes the cost of treatment,
necessary pruning, and disposal of infected wood.