Téléphone: (819) 592-1406

Courriel: [email protected]

Élagage Simplicio

Insects and Diseases

Insects and diseases

Like any living being, your trees can contract deadly diseases if left untreated. Fortunately, our training in arboriculture allows us to treat them and restore their vitality.

Our tree pruning company is proud to put all our expertise to work in combating pests and harmful insects that threaten the health of your trees.

arbre avec une grosse tumeur

Powdery mildew

This fungal disease gives the leaves a white appearance. While it doesn’t cause any major harm, it can affect your tree’s growth and cause the leaves to drop temporarily. Don’t worry though — your tree will bounce back!

Types of prevention

  • Choose varieties that are resistant to powdery mildew.
  • Water your plants during dry spells to help them stay healthy.
  • Try to avoid wetting the foliage during hot weather to prevent fungal growth.
  • Make sure there’s good air circulation between your plants to keep them happy.
  • Don’t over-prune or fertilize too much, as it can encourage unwanted growth.
  • Pick up any fallen leaves that have been damaged by the fungus to stop it from spreading.
  • Consider using biofungicides to keep your plants protected in a natural way.
  • Prune away any infected buds to help the rest of the plant thrive.
  • Quickly remove and dispose of any infected parts to keep things under control.
feuille d'arbre verte avec beaucoup de tâche blanche démontrant la maladie

Did you know?

 

Although it’s not technically a fungicide, baking soda is a great natural option to help fight powdery mildew. While it doesn’t kill the fungus outright, it prevents it from spreading and growing.

Here’s a simple recipe to create a protective spray:

  • 5 teaspoons of baking soda
  • 3 tablespoons of black soap
  • 5 liters of warm water

Mix everything together, then spray the mixture on your plants once a week, repeating 3-4 times in total. It’s an easy and eco-friendly way to keep powdery mildew in check!

feuille d'arbre verte avec beaucoup de tâche blanche démontrant un fongicide

Beech cortical disease

This disease is caused by an insect called the cochineal, which makes small holes in the bark. These holes create an entry point for fungi to invade your tree. The parasite causes the trunk to have a puffy, damp appearance. Over time, a white, moss-like substance will start to accumulate on the bark, and small red mushrooms may appear. At this point, the tree can become unstable and dangerous, even if it still has plenty of foliage. It’s important to address this issue quickly to prevent further damage.

Types of treatment

You can help slow the progress of the disease by watering the tree with a soapy solution and gently brushing the bark to remove any visible buildup. This can help reduce the spread of the cochineal insect and the fungi. Additionally, applying dormant oil can be an effective way to control the pest during the tree’s dormant season, as it smothers the insects and prevents them from re-infesting the tree. These simple steps can help protect your tree and prevent further damage.

Did you know?

Beech cortical disease is unfortunately not something that can be fully cured. Once a tree is infected, it becomes too risky for the surrounding vegetation. To prevent the disease from spreading to other trees, the infected tree must be removed as soon as possible. It’s important to act quickly to protect the health of the rest of your forest or garden. While the tree itself may be beyond saving, early removal helps to limit further damage and keep the rest of the area safe.

tâche blanc sur les racine d'un hêtre représentant la maladie corticale

Dutch elm disease (HD)

As the name suggests, this disease targets eastern elms. During the summer, the leaves begin to wilt, turn brown, and eventually fall off. Once the pest is detected, it’s important to act quickly by pruning the affected branches and applying pesticides to help control the spread. Additionally, be sure to remove and dispose of any infected parts of the tree as soon as possible to prevent further damage and protect the health of the tree. Timely intervention is key to stopping the disease from spreading to other trees.

Did you know?

The only way to slow the spread of Dutch elm disease is through a very costly injection system. Unfortunately, no company in the Outaouais region currently offers this service. While these injections can help slow the progression of the disease, they do not cure it or save the tree. In fact, there is no known cure for Dutch elm disease (DED). The best course of action is early detection and, if necessary, removing infected trees to prevent the disease from spreading to healthy ones.

White pine blister rust

You can identify this parasite on your white pines by the appearance of orange patches and cankers on the trunk. These cankers slowly strangle the tree, blocking the flow of nutrients and water, and often lead to resinous discharge. If left untreated, this condition can seriously weaken your tree and make it more vulnerable to further damage. It’s important to address the issue as soon as possible to protect the health of your white pines.

Type of treatment

Remove bark affected by fungi

Maple tar spot

As the name suggests, tar spot causes black spots to appear on the leaves of your maple trees, usually in late summer. While these spots are not immediately harmful to the tree, if the infection persists over several years, it can become more problematic. The spots block sunlight, preventing the tree from carrying out photosynthesis effectively, which can weaken the tree over time. If left unchecked, this can ultimately lead to the tree’s decline. Regular care and early intervention can help prevent long-term damage.

Type of treatment

Collect and dispose of fallen leaves

Feuille verte avec tache goudronneuse de l’érable

Maple budworms

These green or red growths on your leaves are caused by sap-sucking mites. While they may look concerning, there’s no need to treat them, as they cause minimal harm to your trees. Over time, these growths will naturally disappear, and your tree will continue to thrive. Just keep an eye on it to ensure it stays healthy!

Type of treatment

No treatment

Phytoptes de l’érable​

Emerald ash borer

The emerald ash borer is a destructive pest that feeds on the wood just beneath the bark of your ash trees. As it infests the tree, you’ll notice a few telltale signs: the loss of foliage starting from the top of the tree, “D”-shaped holes in the bark, and winding “S”-shaped galleries under the bark. These indicators suggest the tree is being damaged, and if left untreated, the emerald ash borer can quickly weaken and eventually kill the tree. Early detection and action are key to preventing further damage.

Type of treatment

  • Insecticide injection (such as Confidor, Acecap, IMA-jet, or TreeAzin) can help protect your tree by targeting the larvae feeding beneath the bark.
  • Cutting affected areas of the tree can help slow the spread of the pest, particularly when you remove branches or sections showing visible damage.
  • Tree felling may be necessary if more than 30% of the tree is affected. In such cases, removing the tree is often the best option to prevent further damage to surrounding trees.

It’s important to act quickly, as early intervention can help preserve the health of your ash trees and prevent the spread of the emerald ash borer to other trees in the area.

écorce d'un frêne victime

We here to help you find the best solution for you and your trees!