GFM Network News


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


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

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

Majestic trees threatened by Dutch elm disease

Here are tips for spotting this devastating disease and preventing its spread

Alberta Dutch Elm Disease Awareness Week concluded on June 28. “American elms are planted extensively in Alberta and throughout the years have become the tree of choice for the Prairies with good reason,” said Janet Feddes-Calpas of the Society to Prevent Dutch Elm Disease (STOPDED) executive director. “These giants with their height and broad vase-shaped […] Read more