GFM Network News


Elm pruning ban over until March

It’s now time “to start taking the dead wood out of your elm trees,” says Janet Feddes-Calpas, executive director, Society to Prevent Dutch Elm Disease (STOPDED). The only time it is legal to prune elms in Alberta is between Oct. 1 and March 31. “This is when the elm bark beetles, responsible for spreading the […] Read more

Watch for yellow or brown leaves on elms

If elms on your property are in autumn mode already, they may be infected with Dutch elm disease (DED). “Symptoms of DED infection are leaves initially wilting followed by curling, turning yellow, and then brown,” said Janet Feddes-Calpas, executive director of the Society to Prevent Dutch Elm Disease. “This is also referred to as flagging. […] Read more


Elm pruning ban now in place

The pruning ban for elms is now in effect. The ban is part of an effort to keep Dutch elm disease (DED) out of Alberta. Any pruned elm branches or firewood should have been burned, buried, or chipped by March 31. “If elm trees are pruned during the pruning ban period, beetles that are active […] Read more

Time to get the dead wood out

The annual elm-pruning ban is over until March 31, so it’s time to remove dead wood that can attract elm bark beetles, says the Society to Prevent Dutch Elm Disease (STOPDED). The beetles breed and overwinter in dead and dying elms but trees can’t be pruned between April 1 and Sept. 30 because the pests […] Read more


Annual elm pruning ban now in place

The ban on pruning elms is now in place until Sept. 30. All pruned wood and firewood from elms should now have been disposed of, either by burning, burying or chipping. Stored elm wood can harbour the elm bark beetles that can carry DED. “If elm trees are pruned during the pruning ban period, these […] Read more

Tree pruning is a good thing when done properly

When done properly, pruning will produce strong, healthy, and attractive trees. “However, before pruning a tree, you need to understand why, when, and how to prune,” said Janet Feddes-Calpas, Stop Dutch Elm Disease (STOPDED) co-ordinator. Rule No. 1 is don’t top a tree. “Topping is the practice of removing large branches and tops of trees […] Read more


Winter is the time to prune dead wood from elms, but it’s recommended you employ a professional arborist.

Elm pruning ban over until March

Pruning elms to keep them healthy is essential to keeping Dutch elm disease 
out of the province


The annual elm-pruning ban in Alberta has been lifted until March 31. “It’s time to start taking the dead wood out of your elm trees,” said Janet Feddes-Calpas, executive director, Society to Prevent Dutch Elm Disease (STOPDED). “To help eliminate elm bark beetle habitat, elm sanitation is essential to an integrated Dutch elm disease (DED) […] Read more

Elm pruning ban in effect until October

The Society to Prevent Dutch Elm Disease (STOPDED) is reminding Albertans the provincial elm pruning ban remains in effect until Sept. 30. Under the Alberta Agricultural Pests Act, it is illegal to prune elm trees during this time or store elm wood. Stored elm wood can harbour the elm bark beetles that can carry DED […] Read more


Elm-pruning ban lifted until next spring

Now is the time to remove dead wood to help keep elms healthy

The annual elm-pruning ban in Alberta has been lifted until March 31. “With the annual ban now lifted, it’s time to start taking the dead wood out of your elm trees,” said Janet Feddes-Calpas, executive director of the Society to Prevent Dutch Elm Disease. “To help eliminate elm bark beetle habitat, elm sanitation is essential […] Read more

Dutch elm disease can cause leaves to wilt or droop, curl and become brown in early summer.

Dutch elm disease on the march, so check your trees

Both the number of beetles carrying the disease and the number of municipalities with infected beetles are increasing

Albertans are being urged to check their elm trees for symptoms of Dutch elm disease (DED). “All species of elm trees in Alberta are susceptible to DED,” said Janet Feddes-Calpas, executive of the Society to Prevent Dutch Elm Disease (STOPDED). “If a tree is infected with this fungus, it must be removed immediately to prevent […] Read more