rust on cucumber leaves ⋆ 👨‍🌾 Farmer-online ⋆

Rust on cucumber leaves is one of the most common problems that gardeners face. It is worth considering the main causes of such a nuisance, as well as figure out what to do to destroy it.

Why did it appear?

The homeland of cucumbers is tropical forests, which are characterized by a humid and warm climate. Therefore, it is necessary to take into account the conditions for growing a crop so that it does not get sick and does not die. Even minimal disturbances can cause the development of various problems, one of which is rust on the leaves when grown outdoors.

Gardeners identify several reasons for the formation of rust.

Fungal diseases. These include anthracnose, peronosporosis, ascochitosis and other types of fungi that can lead to a change in the shade of leaf plates.
Sunburn. The most unfavorable factor – it often acts as the main cause of the appearance of dark spots on cucumber leaves, which gradually begin to grow. Over time, the plant is able to cope with the problem on its own and continue normal development. However, if the leaves are completely burnt, they cannot be processed and restored.
Wrong care. It is also a fairly common reason, which can be detected by the way the leaves are covered with dark spots. There is a high chance of leaf death.
Long rains. They lead to an increase in humidity, due to which the immunity of cucumbers drops noticeably, and the risk of developing various diseases increases.

Spots on the leaves of cucumbers appear with fungal and bacterial diseases. To start treating a cucumber, you should first make sure that there is a problem.

Symptoms of the disease

Determining the presence of rust is not as difficult as it might seem at first glance.

Black rot. In this case, the leaves are covered with red dots and deformed, gradually changing shape and twisting. Over time, if no action is taken, the spots completely cover the surface, and a sticky liquid begins to appear on the damaged areas.

Anthracnose. The disease occurs at elevated temperature or humidity, when a large amount of moisture or condensation settles on the surface of the leaves. The leaves begin to become covered with yellow spots, which are characterized by a regular rounded shape.

Peronosporosis. On the leaves and stems of the plant, small spots of a bright yellow hue are formed, which gradually increase and become more saturated, changing color to reddish. Over time, if the culture is not sprayed in time, it will dry out and die.

Corner spotting. It is characterized by a greasy green coating that covers the leaves. After a while, it acquires a reddish tint, breaks and forms holes in the leaf plates. In the absence of any measures to eliminate the disease, it passes to the fruits and gradually destroys the plant.

Mosaic. A feature of the disease is star-shaped rusty spots that start attacking cucumbers from the leaves, and then move on to the stems and fruits. The spots quickly increase in size, which leads to the drying of the leaf plates and their further death.

Melon horn. A clear sign of her attack is a rusty spot that appears on the cucumber leaf. And also the plates quickly begin to deform and twist, then fall off.

Spider mite. The parasite is also able to bring rust with it, which settles on the back of the sheet. In addition to rust spots, white cobwebs can also be found on plant elements.

Any sign that confirms the presence of rust indicates that cucumbers need treatment.

How to treat?

Cucumber rust damage requires immediate treatment. If the disease is caused by a fungus, gardeners at home recommend using a number of drugs.

Bordeaux liquid in the form of a solution with a concentration of 1%. The tool is mainly used for preventive treatment, which is carried out in the spring or early June. On average, it is recommended to process cucumbers up to 4 times per season. The tool can be bought in a specialized store.

“Oxyhom”. For spraying cucumbers, 20 g of the drug dissolved in warm water is enough. The resulting solution is used to treat rust-affected plant lashes.

“Arceride”. It is a fairly effective preparation aimed at eliminating rust. Gardeners note that it is possible to get rid of the problem in the early stages even after a single treatment of the leaves.

“Fitosporin”. The tool attracts with its low cost and effective composition. With the help of a simple concentrate in the form of a solution, it will be possible to prevent the development of a fungal infection.

“Benomyl”. The tool is aimed at combating anthracnose – a fungus that often affects cucumbers. Before using the drug, it is recommended to carefully study the instructions.

“Formalin”. Mainly used to combat mosaic. The drug is used in the form of a solution of low concentration mixed with water. Processing is carried out in the spring season, before the flowering of the crop. The tool quickly copes with the task – eliminates the disease and restores immunity to the plant.

Before you fight, you need to carefully examine the plant and trim the affected areas that cannot be restored. Otherwise, the disease will return immediately after treatment and continue to develop.

In pest control, it is better to use drugs such as:

“Spark”;
“Inta-Vir”;
“Fitoverm”;
“Akarin”;
Apollo.

Means effectively eliminate insects and prevent the development of the disease. The drugs have a high concentration, so they need to be diluted in accordance with the instructions.

Finally, rust control can be organized through the use of folk remedies.

Milk serum. To prepare an effective solution, you need to stir 1 liter of the dairy product in a bucket of water, and then process cucumbers and crops nearby. In case of treatment of small areas, the serum can be used without dilution.
Ash solution. Prevents the spread of rust throughout the plant. For processing, wood ash is mixed in an amount of 200 g with boiling water (2 l). The finished solution is infused for 2 days, then a small amount of crushed laundry soap is added to the mixture. Seedlings and adult trees are treated with the finished solution for a week, spraying the bushes three times. If the leaves are severely affected, cucumbers are sprayed 6 times a week.
Onion solution. The tool perfectly eliminates anthracnose, not allowing rust to develop to the level of destruction of the plant. You can prepare a solution from 50 g of onion peel, filled with water in an amount of 10 liters. After the mixture is boiled and insisted for a week. Processing requires the use of 1 liter of solution per 1 bush.
manganese solution. An excellent solution for the treatment of cucumbers infected with black leg. Before use, manganese is added to a volumetric container with water, after which they start watering the plants.

You can also deal with spider mites with the help of folk remedies. Popular options.

Potato tops. It is enough to take 1 kg of tops and immerse in a bucket of water. Then it remains to infuse the liquid for 4 hours. The leaves of the plant can be treated with a ready-made solution.
Marigold. It is necessary to take no more than 5 kg of pre-dried flowers, pour them with boiling water in a volume of 10 liters and insist for 14 days. At the end, 40 g of laundry soap is added to the tincture, after which the cucumbers are processed.

You can cure rust, and prevent crop and plant death if you use proven products.

Preventive measures

Rust is a loud signal of a plant about the presence of a serious disease. In order not to bring to such a state, it is necessary to take preventive measures for cucumbers.

The best solution would be to plant a crop in a greenhouse, the soil in which is fertilized with humus and peat.
Water the plant with warm water.
It is important to monitor the humidity in the greenhouse. The indicator should not be above average.
Avoid overheating and waterlogging cucumbers. To do this, it is recommended to regularly monitor the microclimate in the greenhouse.