The Dangers Of Tree Fungus

Tree Fungus Dangers

Healthy trees bring a natural beauty to any landscape, improving the overall ambiance of any outdoor space. A tree with curled leaves, unnatural growths, and bare branches does not improve the space, and is a sign of a bigger issue: tree fungus. Identifying and addressing fungal infections promptly is crucial to maintaining the health and appearance of the tree, as well as preserving the beauty of the surrounding landscape. Your trusted Edmonton arborists can help you do just that.

If left untreated, fungal infections have the potential to weaken and ultimately kill trees. Adding to the problem is the fact that these infections can spread quickly, posing a threat to neighbouring trees and plants. Quite often, if you find one tree suffering from a fungal infection, there will be more trees in the immediate vicinity suffering as well. If you suspect that a tree in your area is suffering from a fungal infection, you should seek immediate professional assistance to prevent the spread to other trees and take preventive measures to protect nearby trees from potential fungal infestations.

Common Types of Tree Fungus Found In Edmonton

Tree fungus will greatly sicken and weaken any infected trees. Regular care, maintenance and inspections will help ensure your tree’s health, but even previously healthy trees can become infected. If you notice any signs of fungus on your trees, such as discoloration or unusual growths, it's important to address the issue promptly. Tree fungus can spread quickly and have detrimental effects on the overall health of your trees if left untreated.

Some of the more common types of fungal infection you should keep an eye out for in Edmonton include:

Dutch Elm Disease (DED):

DED affects any type of elm tree, and since its introduction from Europe around the 1930s, it has destroyed millions of American elm trees across North America.

The elm bark beetle, which carries the disease, has been found in the province since 1994. DED has typically arrived three to seven years after the first detection of elm bark beetles in other jurisdictions, and the City of Edmonton has invested in a preventative strategy to protect one of the world's last stands of healthy elms.

The early signs of infection appear from the end of June to the middle of July when the leaves at least one of the infected tree’s branches wilt, droop and curl, before turning brown, although they usually stay on the tree. If infected later in the summer, the leaves will droop, turn yellow and drop prematurely, and will often be confused with seasonal changes. These symptoms will be accompanied by brown staining in the sapwood. As it can be confused with other fungal infections, lab testing is needed to confirm

If left untreated, DED will lead to tree death.

Black Knot Fungus

Cherry and plum trees are vulnerable to Black Knot Fungus. It appears as dark, rough growths on branches and twigs, deforming branches and reducing growth. It can weaken and stunt a tree’s growth, and eventually kill the tree if left untreated.

Unlike DED, it is a native plant disease and well established in the province.

Root Rot

Root Rot refers to several types of fungi that attack the roots of a plant, depriving it of water and nutrients. While some kinds of fungi, such as honey mushrooms, do appear on the infected plant, as others do not show any external signs of infection, so it can be hard to identify.  However, yellowing or browning leaves, and a general thinning of its foliage, are signs that there is something wrong with your tree’s ability to feed itself.

Regularly monitoring your trees for any signs of fungal growth or overall decline that may indicate deeper root issues.

Dortiorella Elm Wilt

Dothiorella Elm Wilt causes the wilting and die-back of American and Siberian elm trees. It causes wilting, drooping, curling and yellowing of leaves, branch dieback, and browning of sapwood. It is very hard to distinguish from DED.

The disease attacks elm trees that are already under stress. Elms with Dothiorella Elm Wilt can live for years with low to moderate levels of fungal infection. However, not all infections lead to the death of the infected elm tree, as those with extensive canopy dieback are considered for removal.

While the tree can fight the disease with proper care, the problem lies in its ability to spread, as the disease is spread through its spores and is hard to contain.

Treating And Preventing Tree Fungus

The presence of fungal infection in one tree suggests that the environmental conditions are favorable for the spread of the disease to other nearby trees. It's important that you monitor the health of any neighboring trees, and take preventive measures to control the spread of the infection. Regular inspection and appropriate treatment can help minimize the impact of the fungal disease on the entire tree population in the area. But be aware there is no perfect tree fungus treatment. What works for one tree may not work on another, even if they’re the same species, and factors like severity and spread can impact treatment options.

Treatments for different fungal infections will vary, so be sure to consult our ISA-certified arborists before attempting any treatments and preventative measures. Some common methods include:

Proper Watering Techniques

Stressed-out trees have a lower natural defense, making them more susceptible to disease and infection. Proper watering, particularly during periods of drought, can reduce a tree’s stress, and ensure your tree is getting enough water.

Avoiding over-watering your treat, as excessive moisture in soil with poor drainage can lead to root rot. Your Edmonton arborists can assess your soil conditions and provide tips on how to better irrigate your trees.


The pruning of diseased or infected branches may help slow or eliminate fungal infections. However, for disease control purposes, pruning certain types of trees may only be allowed during certain times of the year. Speak to our expert arborists about when you may be allowed to prune your trees, and keep a diligent watch on any potential or neighbouring trees.

Antifungal Treatments

After pruning, you often can apply fungicide to your tree, but keep in mind that not all fungicides are alike, as they can be applied in different ways. Additionally, antifungal treatments may not work on some diseases, such as Dortiorella Elm Wilt.

Be sure to do your research before applying any treatment, and speak to a professional arborist about your options.

Count On Us For Trusty Tree Services

Regular monitoring and maintenance of your trees can go a long way in preventing tree fungus from taking hold of your tree. In addition to regular monitoring and maintenance, proper pruning techniques and ensuring good airflow in your soil can also help minimize the risk of tree fungus, and promote a healthy growing environment for your trees.

Our arborists are ISA-certified, and are dedicated to helping you with all your tree care and maintenance service needs. We offer a wide range of services, including tree pruning, tree removal, deep root fertilization and tree consultation services. Contact us today for your free quote, and learn how we can help you care for your trees.


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Preethy Thomas
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Left us a 5 star review

Preethy Thomas
October 8, 2023

What a fantastic crew!!! Sarah & Shane came and trimmed my rather large tree. Such a professional, knowledgeable, caring, capable and courteous crew. Very well done from beginning to end.They did a fabulous job!

Greg Demuynck
October 4, 2023
Brenda Moore
September 25, 2023

Trusty Trees did their magic at my Mothers house in Fort Saskatchewan. Mikex2 we’re on time, organized and knew their business. Gave the trees a good haircut as they had a lot of dead areas. Very pleased with their service, would definitely recommend them! Much thanks Mike and Mike.

Dwayne Thiessen
September 10, 2023

We had a crew from Trusty tree services to come and remove 6, 40 foot aspen trees. They did an awesome job. They were very knowledgeable and very considerate of our property and our neighbours property. They had our yard and neighbours yards totally cleaned up when they were finished. I would highly recommend Trusty Tree Services

Ron Tkachuk
August 22, 2023

We had a crew from Trusty Tree Services trim three trees on our property a few weeks ago, sorry for the late review. Couldn't be happier with the whole process. From the estimate to the final clean up, everything went very well. I contacted other companies for estimates, didn't even get a call back. Thanks again Trusty Tree for a great job!

Matt H
August 4, 2023

Trusty Tree Services came out and pruned our Amur Cherry tree in Fort Saskatchewan and did a great job. The technicians were knowledgeable and gave me tips on how to better take care of our tree. The technicians were friendly and polite and cleaned up before they left. I would definitely recommend Trusty Tree Service!

Sarah Wilson
July 25, 2023

Excellent job! I highly recommend this company. I will be calling again this fall! I am very happy.

Cindy Grier
July 7, 2023

We had an amazing experience with Trusty Tree. They gave a prompt estimate for some very difficult trees in our campground. They arrived on time and began work immediately. Their expertise shone through as they brought down the trees on point! Friendly, informative, professional and outstanding workmanship. I would recommend them in a heartbeat. Shout out to Colton, Joe and Adrian - great work!

Deanna Craig
July 5, 2023

We had Trusty Tree out this year to shape and thin 4 trees and 3 Mugo Pine shrubs. I was impressed with a quick appt for the quote and then quick response for booking. Our trees were pruned earlier in the season as this was the recommended timeframe, and the Mugo Pine shrubs pruned later in the spring after the new growth appeared. I'm pleased with the crew that came out, they were polite, professional and experienced. We are happy with how our trees and shrubs look and feel the price was fair. We would definitely recommend Trusty Tree and will have them back in the future. Thanks for taking extra time with us to talk about proper pruning too!

Mark stime
June 26, 2023

Very professional and courteous crew. Difficult tree to cut down with bucket truck given clearances.

christine Maclean
June 22, 2023

I am a new widow and my yard work is so overwhelming, I called Trusty tree to come over and give me a quote. Because my husband who has slways been in love with taking great care of our home,has passed I am here to do it alone.Trusty tree are the most professional people I dealt with..And they actually had the most professional quote,they took pictures of my Tree to elaborate on what needed to be done,and explained why everything had to be done in a certain way...after 3 other companies coming out I realized that Trusty Trees quote was extremely fair. So when the Trusty Tree crew arrived to prune my beloved tree, they were ready, and really understood the sentimental value of my tree that my late husband and I used to sit under every night. The crew members Joe and Shane collaborated beautifully brought down the required amount of my tree..They had a fantastic chipper on site and they also cleaned up the yard so beautifully after the cutting was done...If anyone reads this review,please understand how much that tree meant to me and my late husband. Joe and Shane gave it a loving and caring trim, and they where not only hard working but very informative of the process,and very just great guys,they included their sense of humor to make the trimming process easier on me. THEY were so compasionate and understanding . I thank them for that..... If you are thinking of pruning your gorgeous beloved tree, Trusty Tree has got be your only choice. THESE GUYS ARE THE BEST!!! My name is Christine and if anyone wants to contact me about what a great job this crew did..please do!!!

Sarah Whyte
June 22, 2023

Trusty Tree is a great place to work. Management is caring and hardworking. Equipment is of high quality and maintained professionally. Smooth operation and always great communication between management and team members.Looking for a place to work? This is the place.

Carla Hanak
May 26, 2023

I highly recommend Trusty Tree Services! From start to finish everything was handled promptly, professionally and courteously! They are very knowledgeable and efficient. I really liked how they explained things. We will definitely have them back for some fall work. Thanks to everyone!

Darryl Edinga
May 23, 2023
Karli Butler
May 19, 2023

We were sad to see our tree go, but it wasn’t well and bigger and bigger branches were breaking off; however our Trusty Tree Arborists did a great job. Thanks to @Sarah and @Michael and thanks for the excellent service Trusty Tree.

gary hnatko
May 17, 2023

Excellent, prompt, efficient and professional service. Team was very pleasant to work with. In and out in no time. Clean worksite. Would definitely recommend.

Linda Lankoff
May 11, 2023

The services provided were both reasonably priced and work done was excellent!

Marylyn Reed
May 5, 2023

Very fast professional and thorough work done on both my experiences with Trusty tree Service. Good cleanups and answered all questions. They made valid suggestions which I appreciated. Thank you.

Stephen Davidson
May 4, 2023

Excellent experience. Very knowledgeable experienced crew. Safety is a priority .Highly recommend . Great Job!

Darci White
May 3, 2023

Very speedy and clean-up was amazing. Thanks guys

Gordon Sandberg
April 28, 2023

Thanks to Mike and the crew for doing a great job on Grenfell Ave St Albert. Very professional service.

Colleen Butler
April 27, 2023

Fantastic! The team did an excellent job pruning and shaping our trees. Thank you

Paul Whattam
April 27, 2023

This was the second time I've used this company for mature tree removal. This time 4 fully grown columnar Aspen trees located close to fencing, a deck and between 2 houses were successfully removed with no damage to the aforementioned structures but also nearby concrete curbing. Work was done as scheduled, quickly and neatly. Very satisfied with the work.

Rob Butler
April 25, 2023

Great service by the guys at Trusty Tree Services. Very professional and knowledgeable. They really knew their stuff about how to properly prune each type of tree in our yard. Our trees look so much better now and will have the opportunity to thrive. Good care for our garden ornaments and great cleanup afterwards.Thank-you

Darvin Mills
April 24, 2023

Mike And Shay trimmed 11 trees in and around our complex this morning and did an amazing job. They were professional and punctual. Arrived on time, very efficient and ensured that all branches were clean up before leaving. Very pleasant to work with and we look forward to working with Trusty Tree Service over the summer and fall.

Lionel Grobel
April 22, 2023
Judith Hum
April 20, 2023

The gentlemen took down a long dead tree YAY !!!! Professional, honest and did a super job THX !!!!

Shelley Honey
April 18, 2023

Thank you Sarah for all of your help!

Sherry Honey
April 17, 2023

Sarah was very knowledgeable and walked us through the options of our tree removal. The team was friendly and overall a great experience. Would highly recommend Trusty Tree Services.

Paul Cairns
April 13, 2023

I look for three things when it comes to service: 1) friendly attitude, 2) timeliness, and 3) efficiency. The crew were excellent in all three scores. It was great to see a clean truck, maintained gear, and use of personal protective equipment as well. This is a great choice for tree care. Done in less than an hour!!!

Dean Mason
April 12, 2023

Mike’s crew did an amazing job for us - pruned trees & removed every visible black knot fungus. They picked up every twig & left our yard tidy. Very personal & professional crew - would strongly recommend their services ! 👍

Bea & Randall Huisman
April 12, 2023

Sarah and crew were here this morning and did one terrific job of trimming all of our trees. I highly recommend them to everyone needing any tree services done.

April 11, 2023

Sarah and Danny did a great job removing a large tree from the front of my yard. I was impressed with the time efficiency and clean up. I would recommend.

Christina Colenutt
January 19, 2023

When Trevor came to quote my yard at my new house, he helped me identify all the trees and shrubs, and clearly explained what work needed to be done. When the day came to do the work, Kolton and Carl were friendly and also walked me through what they were doing and why (I'm interested in these things and was asking questions). They did their best to save my cherry that is infected with black knot. Looking forward to having them come back to continue tree maintenance in the future.

Jenn C
September 26, 2022
David St. Jean
April 6, 2022
Ed Clarke
January 25, 2022
Lisan Maclean
September 15, 2021

We had trusty trees! Cut down our tree and put all new grass down in our back yard and it's absolutely beautiful 😊 Also the crew are very friendly and extremely hard workers! Thank again ❣️

Matthew Hudon (Matt SH)
July 6, 2021

Excellent value for the work they provide. Our crew was very professional and cleaned up the area they chipped in, right down to the pavement.

Trevor Small
June 13, 2021

Trusty Tree is great. Had them remove two trees with cleanup and shredding. looks great and would use again!

Jessy Yau
June 8, 2021

We had a tree in our yard that had died a few years earlier and wasn’t sure who to call. We called Sunstar who recommended Trusty Tree to us. Trevor came out to look at our tree. We didn’t realize we had another Tree that was diseased. He sent us a quote very quickly. He was able to book a time for tree removal, stump grinding, as well as planting our new trees. The project was done in the timeline provided. The crews showed up on time or earlier than expected which was amazing! They were very professional. I would hire Trusty Tree again!

Renee Pelech
June 7, 2021
keith b
June 5, 2021

Professional, courteous and reasonable pricing. Keep it local folks!

Rick McBryer
June 4, 2021

Excellent service. Good response time and automatic communication / payment system. Work was done effectively and efficiently.

Jay Lewis
June 4, 2021

Fantastic experience, staff was friendly and prompt. Left our acreage clean and tidy. Defiantly recommend Trusty Tree.

Graham Wyllie
June 3, 2021

They were on time did a great job & would recommend them any time.

David Provost
June 3, 2021
Sales Tech Patrol
June 2, 2021

Great service, Always happy to please. The team is great excellent at cleaning up and making everything look great. Highly recommend Trusty Tree.

Roger Crispin
June 2, 2021

Well done. Good service.

Lisa Johnston
June 2, 2021

Trusty tree has been doing work for a condo association for the last few years. They are always reliable, and thorough and easy to deal with.