Walnut Diseases and Their Treatment
Walnut trees are very common deciduous trees throughout Europe, although they are also found in Asia. They have many uses, both for native fauna and for humans, as they provide plenty of shade, food, as their fruit is edible, and high-quality furniture is made from the wood due to its great resistance to insect attacks.
And I want to talk to you about them below: about these pathogenic insects and microorganisms that can cause problems at some point. But What exactly are walnut diseases and how are they treated?
What diseases attack walnuts?
Being a very hardy plant, it can have very few diseases. They manifest themselves when the health of the tree is weakened for some reason, either due to excess water in the roots, extreme heat, or because it was cut with a tool without disinfection, for example. These are the following:
Anthracnose
Image – Wikimedia / Jerzy Opioła
Anthracnose or canker is a fungal disease caused by various pathogenic fungi. In the case of walnut, the main cause is Gnomonia leptostyla. This causes circular, brown spots to appear on leaves, branches and fruit. You need to be vigilant because these spots are very compact at first, but they get larger over time.
Like the enormous majority of mushrooms, Gnomonia A balmy environment with air humidity above 90% is preferred. For this reason, it is recommended to apply a fungicide against anthracnose prophylactically (e.g. one sachet per 750 ml of water) in spring and immediately after the appearance of symptoms.
bacteriosis
Image – Flickr/Hermes Almond
Black walnut blight or bacteriosis, as the name suggests, is caused by pathogenic bacteria. In the specific case of walnut we need to talk about Xanthomonas arboricolaa type of bacteria that causes compact, greasy, black spots on leaveswith a yellowish center. Sometimes it also attacks flowers and fruits.
It is a disease that may appear especially after rainand when temperatures are still gentle. Unfortunately, there is no treatment: as soon as the tree shows the first symptoms, the affected parts should be removed.
What pests might it have?
He Royal music It is a fruit tree that is a pleasure to grow because it rarely gets diseased or is attacked by insects. But we must never forget that it is a living being and as such it can get diseased if conditions weaken it. For this reason, it is also crucial to know the pests that can affect you:
Wood drill
Image – Flickr/Camponotus Vagus
The bark beetle, also known as the birch bark beetle, is an insect that can cause a lot of trouble for hickory trees. Both the yellow borer (Zeuzer Pyrin) like red (goat goat) which the larvae carve galleries in the branchesThis causes the leaves to quickly wither because they lack nourishment.
Symptoms appear in delayed spring and almost always in the upper part of the tree crowns.It is crucial to treat the walnut tree as soon as possible with an insecticide that eliminates pests, such as this one that comes in an envelope for 12 liters of water, so that it does not lose any more leaves.
Carpocapsa
Picture – Wikimedia Commons / Olei
La carpocapsa, whose scientific name is Cydia pomonellais a moth that in its larval phase destroy the fruit feeding on them. Furthermore, the hole in them can be easily distinguished.
To avoid crop loss, treatment with insecticides against caterpillars, such as this one, from the first moment in which fruit begins to develop through the employ of specific insecticides.
How are walnuts preserved?
The first thing to do when you find a walnut tree that appears to be bad is to Recognize the problembecause if it has any pests or diseases, we will have to treat it with an appropriate phytosanitary agent. But apart from that, it is very crucial that it is well cared for; that is, you need to make sure that it does not lack water and nutrients; but not too much, because if we water it every day, for example, and the temperatures are gentle, then the roots will most likely start to die due to excess moisture in the soil.
But… there is more. If we want him to have extra energy to better overcome the disease or plague in a shorter time, we recommend using a liquid biostimulant for plants, e.g. No products found.. This is a product that will assist your defenses become a little stronger, so you are more than likely to recover without any major problems.
When the symptoms disappear, it will be very good to fertilize the walnut tree with a fertilizer opulent in nutrients such as guano, which can come from bats or seabirds, but in any case is one of the best organic fertilizers most recommended for fit plant growth. You can buy it here.
This will make your walnut tree stunning again.