Can A Tree Survive Canker and What İs The Fungicide For Apple Cankers?
How Do You Prevent Canker Diseases İn Plants and How To Save A Tree With Canker?
Wounds in living wood or dead sections of tree trunks, branches, and twigs are known as cankers. Fungal spores and bacteria that cause disease may overwinter in the wounds of your apple tree if it has cankers.
Apple tree cankers should be understood by anyone who grows apple trees in their backyard. To find out more about apple cankers and how to manage them, keep reading.
Causes Of Apple Cankers
Think of apple tree canker as a sign of tree damage. There are several causes of cankers. When bacteria or fungi attack the trunk or branches, cankers result. Injuries brought on by severe heat or cold, hail, or a pruning cut can also cause cankers.
On an apple tree, cankers are dark patches of cracked or roughened bark. They might seem sunken or wrinkled. Fungal spore structures, which resemble dark or red pimples, may also be visible nearby. Fungi that cause wood decay may eventually cause white protrusions to grow from the bark.
Apple Tree Cankers
An entry point is necessary for a canker injury. Bacteria or fungal spores could enter the tree through the wound and spend the winter there, which is the risk of cankers. They acquire and disseminate disease throughout the growing season.
For instance, the apple tree will get European canker if the pathogen Nectria galligena overwinters in cankers. Although Gravenstein and Rome Beauty trees are also vulnerable to European canker, the Delicious apple tree is the most vulnerable.
Diseases are caused by other pathogens. Erwinia amylovora is the pathogen that causes fire blight, while Botryosphaeria obtusa and Botryosphaeria dothidea are responsible for black rot canker and white rot, respectively. Fire blight pathogens are bacteria, but the majority of canker pathogens are fungi.
How Apple Canker is Treated
How to treat apple canker is a question that many gardeners have. The main strategy for managing apple canker is to prune out the cankers. Remove the cankers in the early summer if the canker pathogen is a fungus. After that, apply a Bordeaux mixture or authorized fixed copper materials to the area.
If you take good care of your apple trees, you may be able to avoid fungal cankers, which only attack trees that have experienced drought or other cultural stress. But even healthy trees can get infected by the fire blight pathogen, which is a bacterium. In this situation, controlling apple canker is more challenging.
Don’t prune fire blight until winter. Pruning 6 to 12 inches (15-31 cm) into wood that is at least two years old will reduce the risk of fire blight. To get rid of the pathogen, burn every piece of tree tissue you remove.
Smaller, younger trees will be more challenging to prune deeply. If the tree is young or the trunk has been attacked by fire blight, experts advise removing the tree instead of treating it.
