Diseases of black currant

The most useful berry is black currant. The berry helps to strengthen the immune system, has anti-inflammatory properties, reduces the effects of radiation, promotes the elimination of toxins and helps the body fight many diseases.

Most summer residents have several black currant bushes on their site. This is not only tasty, but also a very healthy berry. Sometimes black currant diseases cloud the joy of enjoying the harvest.


  • Terry currant: signs and prevention of disease
  • How does American powdery mildew manifest
  • American powdery mildew and disease control
  • Anthracnose
  • Anti-anthracnose pathogen control measures

It is very important when growing black currants to know that the plant develops well and bears fruit abundantly only with proper care. Currant bushes are very often exposed to diseases and you need to know how to help them in order to protect them from death. There are remedies for every disease.

Terry currant: signs and prevention of disease

Terry currant. A dangerous disease caused by a virus that can lead to infertility of the bushes. The leaves change, they lengthen, become three-lobed with pointed teeth, and their asymmetry may appear. The number of veins decreases, the flowers become narrow-petaled. The bush shows signs of overgrowth. The plant does not bear fruit and loses its characteristic smell, and the leaves sometimes turn purple.

Terry is transferred by a kidney mite from sick to healthy bushes. Sick bushes must be destroyed, since pruning in this case will not help.

To prevent disease, you need to choose a proven healthy material for planting. After picking the berries, you need to treat the bushes with Karbos or colloidal sulfur, in addition, apply potassium-phosphorus fertilizers, they increase the plant's resistance to terry. An increase in the dose of nitrogen-containing fertilizers has the opposite effect and can lead to double currants.

How does American powdery mildew manifest

This disease is caused by a fungus that hibernates on affected shoots and fallen fruits and leaves.

The disease usually appears at the beginning or in the middle of summer. The disease can affect fruits and shoots. First, a white coating forms. Then the mycelium becomes denser and turns brown. The process involves young shoots and leaves. The growth of the tops of the leaves stops, the shoots grow poorly and die off, the remaining fruits become inedible. With a strong spread of the disease, the plants die in a couple of years.

Thickened plantings, location in shaded areas and increased soil moisture favor the development of the disease. On the contrary, dry and warm weather inhibits the development of American powdery mildew.

American powdery mildew and disease control

To reduce the sources of infection, cut the affected shoots and collect diseased berries with their subsequent destruction. To destroy the infection at the first signs of damage, the bushes and the soil under them are sprayed. To fight, nitrafen, copper sulfate or soda ash is used.

The treatment should be carried out with one of the preparations and repeated after 10 days two or three times. Two weeks before harvesting, you need to stop treating the bushes with drugs. Before flowering and after picking berries, it is also good to spray the currants with solutions of foundationol, sulfur and Topaz.

The bacterial method also gives a result - spraying with an infusion of rotted hay, peat, forest litter or mullein. Processing with infusions is carried out three times: before the onset of flowering, after it and before the foliage falls. This is done in cloudy weather or in the evening.


The disease is also caused by a fungus. Symptoms of the disease appear in May. Leaves, shoots, petioles and berries are affected. Small yellowish green spots appear first, followed by brown spots. With severe damage, the spots can merge, the edges of the leaves curl and fall off. The mushroom hibernates in fallen leaves.

The pathogen is spread by wind or raindrops. In warm and humid summers, this disease appears especially often. Most often, old weakened bushes and early maturing varieties are affected.

Anti-anthracnose pathogen control measures

The fight lies in the use of copper sulfate, nitraphene. Fallen leaves are collected and burned. They dig up the soil. In early spring, before budding, currants are sprayed with solutions of iron or copper sulfate. Immediately after the leaves bloom, before flowering, spraying is carried out with Bordeaux liquid, after flowering immediately again.

With a massive spread of the disease, spraying should be carried out up to three more times: a couple of weeks after flowering, and then after harvesting the fruits after the same time.

Diseases of black currant can be prevented by choosing healthy bushes and timely processing of the soil and bushes and watering correctly and on time.

Watch the video: Blackcurrant Juice Health Benefits (November 2021).