Rust on currants: measures to combat drugs and folk remedies

Practically in every summer cottage and garden plot you can see a currant bush. This plant is quite unpretentious in care, but at the same time it gives a good harvest. But sometimes the bush starts to hurt. Red spots appear on it, which grow rapidly. And in order to save the plant, you need to know what kind of rust occurs on the currant, and what measures to combat it exist.

Types of rust and signs of appearance on red and black currants

Rust is a shrubby fungal disease that causes great damage to the plant itself. Coniferous trees growing near currants are considered the main reason for the appearance of such an ailment.

Glass Rust

Most often, goblet rust affects shrubs growing in the area near a pine or cedar forest. First, a fungal spore falls on a pine or cedar branch, then it develops and multiplies under the bark of a tree.

As soon as the spring period comes, bubble growths appear on the surface of the bark, each of which turns into a red spot.

Inside it are spores of a fungus that first infects sedge, and then currants. The process of infection itself occurs with the help of wind and insects that carry the fungus on their paws. This disease progresses from May to early June.

Column rust

This type of rust affects the upper part of the leaves of the currant bush. From the outside, they are covered with yellow spots, but from the inside, the leaves seem to be showered with orange dots.Inside them are fungal spores. This ailment progresses most in July and August. It is during this interval that rusty spots may appear on the currant.

Causes of occurrence

The reason for the appearance of rust on currant leaves is a fungus that develops only in a humid and warm climate. When it comes to a dry summer, during such a period, the disease rarely appears on the leaves of the bush.

Most often, rust affects currant bushes growing in low-lying areas and where plants are densely planted. Other provoking factors that contribute to the appearance of rusty spots on currant leaves include:

1. Invasion of leaf aphids. This insect can be recognized by small black dots that appear on the reverse side of the sheet. The aphid begins to feed on the juice of the plant, which is why it is covered with blisters of bright yellow color. The shrub grows poorly and gradually dies.
2. Spider mite. Another pest that causes currant rust. This insect settles on the leaves of a shrub, as a result of which a swelling appears on them, which has a rusty tint. After a while, the leaves become completely colorless, after which they fall off.
3. Currant midge. This insect also rusts the plant by laying yellow-brown eggs on it. After an extensive defeat, the shrub dies.

What is the danger for currant bushes?

Rust is a dangerous fungal disease. Striking the currant bush, it contributes to its gradual death. If left untreated, by the end of summer, the lower part of the leaves is covered with rust. The spots grow and change their color to brown and red. The fungus covers the entire affected area.

The currant bush is starting to change in appearance.The leaves become hard and terry. The berries are covered with an orange bloom. You can no longer eat them. Then the fruits dry out and fall off. The shrub, due to the disease, is greatly weakened. In this state, he leaves for the winter. As a result, in the spring, the shoots remain frozen and cannot subsequently begin to ripen.

Cause of columnar rust

If this grass grows near a currant bush, then in the spring it will be infected.

Trees such as pine and cedar are considered another reason for the spread of spores. And given that currants are very susceptible to fungal pathogens, there is a risk of infection. In this case, it is better to choose such resistant species as the black variety of Selechinskaya currant or Primorsky Champion, Eighth Denisova and Chulkovskaya.

Measures to prevent the spread of fungus

Carry out preventive measures aimed at combating rust on a currant bush should be at the beginning of the spring period, while the buds have not yet appeared. As a preventive measure, the land under the bush should be fed. For this, it is better to use phosphorus-potassium fertilizer. As soon as the leaves begin to bloom, they, along with the branches, need to be sprayed with Bordeaux water.

In no case should currants be planted near coniferous and pine trees. As soon as autumn comes, currant branches are treated with a two percent solution of Karbofos.

How to process currants

Currants can be treated with both chemical agents and biological agents and solutions prepared independently. If the currant leaf is severely rusted, then the use of chemicals is indispensable.

But as a preventive measure, you can use biological products or adopt some folk recipe for preparing a solution.

Store funds

Fitosporin-M is considered a good drug. It is able to fight thirty types of fungus. It can be used both during flowering and fruiting.

Other store-bought products that can resist rust include:

• copper oxychloride;
• drug Abiga Peak;
• Kuproksat;
• Strobe;
• Byleton;
• Vectra;
• Oxychome;
• Ordan;
• Topaz.

Folk ways to deal with rust

Before bud break, currants can be treated with a decoction based on onion peel. Then the shrub should be sprinkled with an infusion of garlic and tobacco. To do this, 200 grams of tobacco dust must be diluted in two liters of boiled water, where six heads of garlic are pre-cut.

The solution is infused for three days, after which the diseased bush is processed. The sediment that remains after the solution must be distributed under the bush, sprinkling it with a little earth.

Rules for therapeutic measures

In order to save the shrub, you need to know how to deal with rust that has appeared on the currant. First, you should collect all the fallen leaves, which must be burned. This will stop the spread of the fungus itself. Then you need to dig up the soil under the bush.

A solution based on garlic water and tobacco dust will also help fight rust.

Currant bush can be treated with biological agents that can fight not only the fungus, but also pests. This is:

• Planris;
• Gaupsin;
• biological product Fitosporin;
• Trichodermin;
• Chistofor;
• Propi Plus.

Processing times

The spraying procedure will depend on how rusty the bush is and what preparation it will be treated with.

If infection has occurred, then the first treatment should be carried out before flowering, when the leaves are just starting to bloom.

The second spraying should be during the bud formation period. And the third treatment takes place when flowering ends. If the bush is severely affected, then a fourth spraying will have to be done ten days after the third.

Spray pattern for bushes

Spraying schemes for the currant bush will depend on what exactly it is being processed. If this is an infusion of onion peel and garlic solution, then first the bush must be treated with garlic water, and then, after two weeks, it is sprayed with onion peel.

Currant bush is treated with copper chloride and Bordeaux liquid three times, with an interval of four weeks. It is recommended to do this during the growing season.

With such preparations as Strobi, Oksikhom, Kuproksat, Ordan, Vectra and Topaz, spraying is done twice, with an interval of ten days. Chistofor and Propi Plus processing is carried out three times a season. Treatment is carried out either in the spring - before the leaves have blossomed, or after flowering.

Methods for disease prevention

Disease prevention methods can be divided into:

• mechanical;
• chemical;

Mechanically fighting consists in treating the shrub with hot water. This method will destroy pests and increase the resistance of the plant to various diseases.

After that, all dry branches should be cut. If a large, thick branch is cut, then the place of the cut is smeared with garden pitch. All removed branches and leaves are destroyed. Such a measure helps to protect the shrub from infection with a fungus.

The chemical method consists in treating the bush with prophylactic drugs. In March, it will be useful to spray the shrub and the soil under it with means - Nitrofen or Fundazol. They will help protect against the development of rust and defeat the disease of the currant bush.

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