The olive tree is a Mediterranean tree well known to all. The olive tree is a tree known for its longevity and ability to live more than 2000 years. However, it is also prone to diseases. Here you are detailed disease by disease, the possible disorders of the olive tree during its lifetime.
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- The olive tree facing disease
- Olive disease: yellowed leaves
- Fumagine and mealybug
- Peacock eye on olive tree Olive
- otiorhynca The olive
- Xylella fastidiosa: a bacterium
Plan de l'article
harmful Olive tree in the face of disease
The olive tree has been cultivated for centuries by our ancestors for all the benefits of its fruits and remains a strong symbol in our Mediterranean cultures. If it is usually robust and adaptable to many climates, diseases sometimes invite themselves and can significantly weaken this tree
Like any tree, the olive tree has a response to the disease that is often visible. The causes can be multiple, such as a pruning shredder poorly cleaned before pruning or undisinfected . Symptoms do not wait and the olive tree is rather the kind to show signs of its disease.
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Olive disease: yellowed leaves
An olive tree with yellowing leaves is a sign of illness. If the evergreen leaves of this tree can grow 3 years before turning yellow and gradually renewing , it is not true if they become yellow in mass. This is a sign of imbalance, especially at the level of watering (olive tree in pot).
Fumagin and mealybug
Are the leaves of your olive tree black? Fumagin is a Classic fungus that often indicates the presence of mealybug. Fumagin is recognized: a black powder is created on the branches and leaves of the tree and prevents good photosynthesis.
This disease of the olive tree is minor and is treated by simply cleaning the affected areas with a cloth and soapy water. Try toremove upstream the mealybug , this small black sap sucking insect. Mealybug produces honeydew, on which fumagin develops very well. In order to eliminate this parasite, use an organic insecticide based on black soap.
Peacock’s eye on the olive tree
Also called scub, the peacock eye of the olive tree is a classic disease that affects olive trees in pot or in a tray. The leaves have brown and yellow spots in halo, due to a fungus that loves warm and humid weather (spring and autumn).
In treatment, a good spraying of Bordeaux porridge should solve the problem. Apply in early spring and before autumn at the height of 10 g per liter of product.
Otiorhynccus of an olive tree
When the leaves of the olive trees are typical, arched in a circle, you probably have to deal with the otiorhyncus of the olive tree. This beetle feeds on leaves, and its larvae from the roots of perennials. Englecting the trunk of the olive tree prevents the access of these beetles to the leaves of the olive tree.
The Olive Fly
This time, the leaves are preserved but it is the fruits of the olive tree that recover the disease. The female of the olive fly lays its eggs in the olives, which do not grow and die.
A whole crop can be lost: en Treatment, glu traps are effective, as well as spraying a solution with green clay , which prevents laying.
Xylella fastidiosa: a harmful bacterium
In France or Italy, the olive tree can also suffer the havoc of the bacteria that everyone is talking about. Xylella fastidiosa is responsible for drying out the tips of the leaves of the olive tree. This drying may be due to potassium deficiency or this bacterium. Xylella fastidiosa affects a wide spectrum of fruit trees and needs to be monitored.
No treatment is currently effective against xylella fastidiosa: thepulling of plants is recommended to avoid spreading on other fruit trees.