Disease detection

Émondeur Laval Arbricole

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Detection of tree diseases in Laval

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The detection of diseases in trees is something that must be controlled prematurely to have the opportunity to save the tree. Several factors can interfere in the development of the tree. It is therefore important to know how to deal with a sick tree. Unfortunately the maintenance of the trees is not at the same level as ours. Ignoring the fact that it would be unreasonable to expect technology to be on a level similar to medicine, the real problem is that the interests of trees are generally not the primary consideration in planning in our environment. common urban. However, an undiagnosed tree can become a dangerous tree.

Ways to detect a tree disease

If a tree is at a collapse greater than 20º, it is definitely sick. If there are cracks or raised curbs on the ground, next to the tree, this is also a clear sign of disease. When the roots are exposed, have base rot or dead branches. When he presents spots this could announce that he has contracted a disease. Trees planted near power lines are very susceptible to disease.


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Improve your tree's chances of survival

For people wishing to treat their diseased tree there are basic ideas that our team of arborists in Laval can work with to improve your tree's chances of survival. Several diseases can have completely different causes and can generate different symptoms. Applying incorrect treatments can aggravate the situation of a diseased tree.


Several things have to be taken into account. The first and most important is the establishment of a diagnosis. We therefore seek to identify the cause of the disease, which may have a biological origin, which is why biological factors are taken into account: insects, fungi, bacteria, etc. and environmental factors. Other factors to take into account are also abiotic factors: drought, climate, injuries, etc. Once diagnosed we suggest a treatment that eliminates, reduces or contains the problem and we can also establish a probability of recovery for the tree. We explain the most visible signs that will help you detect a diseased tree:


  • Tree loses its leaves before autumn
  • Leaves turn yellow and dry
  • Leaves show abnormal colored spots
  • Fungi grow on the trunk
  • Bark separates from the trunk
  • Trunk and branches are overgrown with lichens
  • Fruits drop prematurely
  • Fruits rot due to parasites or mold
  • The fruits are covered with spots
  • The fruits are deformed.


When there is no doubt that your tree is diseased, it will be necessary to act as soon as possible. Pruning is one of the main techniques to do. This helps a lot in improving the health of the tree. Trimming the tree is therefore one of the best solutions not only aesthetically, but also to eliminate damaged branches and make them stronger. Before starting the pruning, we will carefully analyze the situation and the state of the tree to know what type of work is most appropriate. This is important for structure and aesthetics.


Another important factor to consider is the size of the tree. To maintain good health in your garden it is ideal to prune the tree so that we can live without damaging it. Clearing dead wood will certainly improve the longevity of trees, but for this you need to know which branches are cut so that this is ideal for the tree.

Treatments for a sick tree

There are other treatments like products that we can apply to your tree. When planting a tree (and expecting it to live for many years), it is particularly important to choose species and varieties that are well adapted to the environment (soil, climate, etc.) because if they get sick, treating them can be difficult.


To treat a sick tree, you can choose between two types of products: synthetic phytosanitary products, ecological products and biocontrol methods. These treatments refer to all plant protection measures using biological agents, products of natural origin, or methods based on natural interactions. The biocontrol method aims to reduce the use of products that are potentially dangerous to health and the environment. Some of these products are currently available to home gardeners, while others that are now only used by professionals, such as potassium bicarbonate or Bacillus subtilis. The different possible treatments we offer in Laval and surrounding areas.


Bacillus subtilis is a bacterium that stimulates the natural defenses of crops (fruit trees but also vegetables) against diseases such as moniliosis, pimples, mildew, etc. Potassium bicarbonate, this product is mainly used against powdery mildew but also against apple tree spots and peach tree moniliosis. Copper, in particular Bordeaux mixture, remains one of the most effective fungicides for combating fungal diseases.

Our advice

Finally, we give you some tips for taking care of your trees:


Avoid any type of work in areas close to the roots, especially masonry or excavation. It is also very important to use a fertilizer rich in phosphorus to provide the necessary nutrients. If the tree is old, let the grass accumulate near the trunk, do the opposite for young trees.


At Émondeur Laval, we offer a tree disease detection service. If you want to have more information on the subject and learn more about our services, fill out the contact form or call us at (450) 231-7333.


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