symptoms and preventive measures

Although hardy and robust in inclement weather, the plum tree is a fruit tree plagued by many garden diseases. The most important thing is to take the right steps when planting to avoid these diseases. Unfortunately, even if we do everything we can to keep them away, the plum tree can sometimes become infected. So, how to prevent and treat this tree from these various diseases? Here are some answers.

plum leaf curl

This cryptogamic disease, originating from a fungus, affects the fruits. They will then deform and become whiter and whiter. Plums may not develop anymore, are very small in size and have no pit.

To prevent this disease, which usually occurs in cold and damp weather, fertilizer seems to be a good solution, especially horsetail fertilizer that you can apply to the plum tree in the spring. This will help reduce the growth of the fungus.

If the tree is already affected, simply remove all affected fruit and treat the tree with Bordeaux mixture.


The main symptoms of this disease are visible on the fruits. You will see small brown spots on the fruits, the leaves that will dry out completely and the bark that will crack and change color to turn red.

To prevent this disease, remember to place the trees well between the trees and to ventilate well thanks to a strong pruning.

Finally, if the tree is already suffering from the disease, the affected parts should be removed and Bordeaux mixture used regularly (every 2 to 3 weeks) until the disease is eliminated. This operation is also valid for many other pathologies.

Credit: Piotrus/Wikipedia


Rust is a fungus that occurs in hot and humid weather. It appears on the leaves of the tree through many small orange dots. The leaves then fall off and the fruits have trouble developing. As for the blister, which also comes from a fungus, horsetail manure helps prevent rust.

If the tree suffers from rust, all diseased parts should be burned, even the leaves and branches on the ground, so as not to spread the fungus spores. Then a treatment with Bordeaux mixture should improve the condition of the tree.

plum pox

Plum pox affects the tree by making the fruit very acidic and therefore inedible. This disease is caused by aphids.

To prevent your trees from being affected by this disease, start by controlling aphids primarily with nettle fertilizer, a natural insecticide.

On the other hand, if your tree has already been affected, it is essential to notify the farming room of your department as only a professional can save your tree. Since plum pox is a highly contagious disease, you need to act very quickly.