Ilananthus or as it is also called Siebold (Juglans sieboldiana Maxim) is listed in the Red Book of the Russian Federation as a wild plant. This tree belongs to the Nut family. In appearance, the fruit resembles a walnut.

Characterization and description of the variety

The variety was first bred in France in 1866 by the biologist Siebold, who was originally from Holland. The nut received its name in honor of its "parent". Walnut grows up to 20 m in height. The trunk of the tree is quite strong, its dimensions reach about 1 m in girth.

The life span of this plant is about 300 years. The crown of the nut is dense, the leaves have a dark green tint. The leaves are long, large. Leaves grow on a brown petiole. On one petiole, you can usually count from 9 to 21 leaves.

Did you know? In ancient Babylon, walnut was highly valued, and ordinary people were forbidden to eat it. Since it was believed that if you eat a large number of fruits, you can grow wiser.

Description of walnut fruit:

• large (reach up to 5 cm in length);
• ovoid form;
• the shell is thick;
• the mass of the core reaches 30% of the entire fetus;
• fruits taste different from walnuts; they are not bitter;
• fat content is about 60%.

The tree begins to bloom in early May. Flowers are divided into female and male.

Females are located at the ends of branches, long and straight in shape, in one brush there can be up to 20 pieces. Male grows in leaf axils up to 5 pieces, the length is about 30 cm. It begins to bear fruit in the 6th year after planting.

Where is growing

It grows well in South Korea and southern Sakhalin. You can also meet in the forests of Japan, on the island of Kunashir. It is well established on fertile soils. It is a heat-loving plant, but also it can withstand temperatures up to -25 ° C.

Important! In spring frosts, the tree bark may be damaged, so it is recommended that you wrap the plant with agrofibre during the cold season.

Productivity

From one tree you can collect up to 2 thousand fruits. Nuts ripen closer to the end of August. In order for the crop to be higher, it is recommended to plant the plant on fertile soil, and also to apply fertilizers and minerals from time to time.

Features

This plant is used for planting in parks. Its main feature is that it purifies the air of acetylene and gasoline vapors. For industrial purposes, also use wood. It is great for making furniture. Fruits, as well as leaves, can be used for medical purposes, for example, to prepare decoctions.

Advantages and disadvantages

Also, this plant has both positive and negative sides.

• Nut Benefits:
• wood can be used in construction;
• fruits have nutritious fats;
• can be used in medicine;
• used as an ornamental plant;
• the plant cleans the air of harmful fumes.

• Minuses:
• grows very slowly;
• poorly tolerates low temperature conditions (from -30 ° C and below);
• grows exclusively on fertile soils;
• propagated mainly by seeds;
• the shell is rather thick.

Did you know? Coconut does not belong to the Nuts family. It is considered palm seed.

Pests and diseases

Walnut Pests:

1. Walnut codling moth . A butterfly (adult) lays up to 200 eggs on the fruits, as well as the leaves of the plant. Caterpillars gnaw their own moves in the fruits, thereby destroying them and injuring nuts. One caterpillar can damage up to 10 fruits.
   
   To destroy the pest, it is recommended to use the preparations "Fitoverm", "Lepidocide". For prevention, it is recommended to remove dry branches and bark, which begins to lag behind the trunk.
2. Upper and lower walnut aphids . The first lives on the top of the leaves, the second on the bottom.
   
   An adhesive strip of aphid secretions begins to appear on the leaves. Their excrement attracts ants. In case of severe damage, it is recommended to use the drug "Decis".

Important! The drug "Decis" should be used only after the plant has faded, otherwise there is a risk of losing pollinators for the garden.

Disease

1. Powdery Mildew It affects leaves and young seedlings. The plant begins to dry, the leaves curl and fall. To combat this disease, you should use a 1% suspension of colloidal sulfur, which will need to spray the tree.
2. Trunk cancer. Called by a lofiostomy fungus. In order to stop the reproduction of this disease, it is recommended to frequently inspect the plant, cut off and burn dried branches.
   

3. Wood rot. To prevent this from happening, you should regularly weed the soil under the plant after watering. In summer, collect the entire crop from the tree, do not leave it to winter. If the tree is already affected by rot, it is advisable to completely remove it from the site, this will allow the disease not to progress.

See how the Siebold nut looks, you can see in the photo. The tree survives well and grows on garden plots, and its fruits are recommended for both children and adults. And its most important feature is that it perfectly purifies the air.