How to deal with Canker disease on fruit trees?

Tree twigs, branches, and trunks develop cankers and a wound on the living wood. You can find fungal spores and bacteria that cause diseases on apple trees with bumps.

You can get tree canker disease treatment services to prevent damage and prevent airborne fungus from getting into the tree. Please continue reading for information on apple cankers and tips for controlling them.

Canker in apples is what? 

On tree bark, Neonectria Santissima causes apple canker and other diseases. This causes a sunken area of dead bark and finally dies off a branch. Spots form in the spring and persist throughout the year.

Pears, Sorbus species, and, less frequently, ash, beech, and other trees are common.

Identification of a Canker

Your branch has probably been pruned before it was infested by canker. As the disease progresses, the sunken area on the bark will grow in size and become split and hollow.

You can tell if your tree has a canker by peeling some bark and finding brown, diseased wood under it. Bark cracks resembling rings often show canker.

Small areas of spores on bark or cracks are also a sign that canker is present. It appears as small, gooey patches in summer and early winter but turns creamy colored in spring.

The lifecycle of the canker on fruit trees

Damaged bark provides an entry point for the fungus to enter the tree. Animals and improper pruning techniques can damage the bark.

Woolly aphids are another bug that damages bark. As autumn and winter approach, fallen leaves are another source of infection.

Autumn / winter

Fall and early winter are ideal for spores penetrating the tree pulp through the broken bark. Winds and rain spread the spores.


Fruit tree flesh degenerates when the temperatures rise in spring. At first, there may not be any visible symptoms. You can see these spores as creamy white parts inside or around cracks in the bark in spring.

Late summer and early autumn

In this case, the tree will be further damaged. New spores, now usually reddish, will be carried to recent locations by the wind. Infected trees can be infected for several meters if the spores travel in the wind.

Canker Damage

Untreated apple and pear trees produce less fruit, and both will die if they are not treated for canker.

Almost as disturbing, if you have over one fruit tree, the spores will probably infect the other trees. And they can even move from apple to pear trees and vice versa. Hence, finding tree canker disease treatment services is crucial as early as possible.

Canker treatment for apple trees

1. Control without chemicals

Canker treatment for apple trees involves pruning the tree to remove the canker. Cut the canker in the dormant season when there is a dry spell.

Pruning diseased wood during this dormant period does not spread the disease. Branch trimming during active growth increases the risk of spreading fungi.

The most effective method of removing the infection is to cut out all rotten bark and wood. You can find tree canker disease treatment services for further help.

They will cut below the infected area so that the wood is all healthy and clean with no signs of infection.

As opposed to infected wood, it will have a cream color. Use pruners on another species only after burning the wood, bark, and foliage.

2. Chemical Control

A copper-based fungicide, such as Bordeaux Mixture, can also help control the outbreak. Unfortunately, it cannot cure existing cankers. Treatment for apple canker remains primarily pruning diseased trees.

Paint the exposed, healthy wood with wound paint immediately after pruning. Find tree canker disease treatment companies to help you with your apple trees.

3. Rid damp weather’s effects

Dry and cold weather is good for canker. Having well-drained soil is critical in areas of complex drainage. Once again, good pruning practices can also help.

However, don’t forget to find tree canker disease treatment services since they will help you quickly and effectively. Allow for free air circulation in the tree’s center.

Here’s how you can prevent apple canker?

  1. To prevent an apple tree canker, you can take several measures. You can do the following: Protect the tree’s bark and branches from damage. After a pruning, coat the exposed wood with protective paint and sterilize the tools.
  1. Cankers are more likely to occur if the tree is planted in heavy, wet soil. Ensure adequate drainage before planting the tree. Compost and sand can expose clay soil and prevent water-logging.
  1. Acidic soil can make apple trees susceptible to fungal canker. Check the soil pH to make sure it is between 5.8 and 7.0. Lime the soil to raise the pH if it is lower than ideal.
  1. Choose apple varieties resistant to canker.

Apple / Pear Varieties Resistant to Canker

The apple/pear tree is not entirely resistant to canker. Still, by growing resistant varieties, you increase your chances of avoiding it. You should do this even more if your area is wetter than usual. Some varieties are resistant to canker, including:

Crawley Beauty, Discovery, Fiesta, Grenadier, Howgate Wonder, Katy, Lane’s Prince Albert, Lord Derby, Lord Lambourne, Newton Wonder, Rajka, Reverend W. Wilkes, and Winston.

Best time to treat canker on apples and pears

Pruning apple and pear trees from mid-November to mid-February to prevent canker damage. This is a good time of year to prune out diseased wood so the disease won’t spread to other parts of the tree or neighboring trees.

Canker is static during this time. Pay attention to the weather forecast, bide your time, and wait for the elusive dry spell to come.

It is vital to keep your apple trees inspected for canker all year round. Even in the dormant period, if you need to prune out canker. If you notice an area that needs treatment, cover it with red paint so you can easily find it later on in the year.

The bottom line

It discusses how canker disease affects apple trees, how to prevent it, how to cure it, and which varieties are resistant to it. You can find tree canker disease treatment services to deal with canker diseases as they have deep knowledge and expertise in handling them.

Yashik Patel
Yashik Patel is a Google Certified, Digital Marketing and professional Blogger. He has 5+ years experience in SEO, SEM and ORM (Online Reputation Management) field.

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