Dangerous raspberry diseases: prevention, signs and treatment

Despite the efforts of breeders to bring out raspberry varieties that are more resistant to diseases and viruses, plants are still susceptible to them. This article describes the most common plant diseases, their symptoms and methods of control.

Raspberry anthracnose

Anthracnose is a fungus that appears as spots on raspberry stalks. Spots of white and gray are bordered with bright red. Fungal spores multiply rapidly and appear on all parts of the plant: bark, leaves, berries. On the cortex, the fungus is manifested by black dot spots, the leaves wilt when defeated, and the berries are covered with ulcers and dry. The affected plant does not develop, loses its deciduous mass, the crop dies later, the characteristics of cold resistance decrease, the bush dies. To avoid illness,raspberries are treated with Bordeaux liquid before bud break, the second time during the formation of buds and the third time they are sprayed in the fall, gathering the harvest. The diseased plant can be reanimated by removing the affected shoots. If nothing has helped, and the disease has not receded, it is necessary to dig and burn the entire bush.

"Witch's broom"

Disease raspberry "witch's broom" is viral. Viruses infect the plant, penetrating wounds caused by carelessness during loosening or other garden procedures. The virus can penetrate through damage caused by rodents or insect parasites. The diseased plant produces a lot of thin sterile shoots, the deciduous mass thins and shrinks considerably, the fruit deteriorates and then stops. The disease can not be cured, so it is necessary to protect the raspberries from the invasion of ants who like to breed aphids. To do this, there are several popular ways:

• Immediately after the winter, while the insects are in hibernation, it is necessary to flood the anthill with water;
• Since insects do not tolerate strong odors, they can be discarded by spilling kerosene around an anthill.

In addition to folk remedies, there are also chemical preparations, powder preparations, you can find out about them in special stores. Remove and burn damaged parts of the plant immediately.

Verticilous wilt, or wilt

Wilt is a raspberry fungal disease. This fungus multiplies very quickly and affects the entire bush. The fungus can infect raspberries by penetrating damage to the trunk or root growth. On the trunk lilac-gray spots, and then the strips rise to the berries. The bark is covered with cracks, shoots die, root shoots, leaves fade and then the whole bush. The sooner you notice the signs of the fungus, the greater the chance of saving the bush. The following drugs will help in the early stages: Topsin-M, Trichodermin, Previcur and Vitaros. They should be used according to the instructions. If the plant is completely affected, scoop out the bush and burn it.

Raspberry curl

Raspberry curliness is dangerous because the affected bushes need to be uprooted and burned completely, despite the fact that only some parts can be affected. This virus is not treated.Symptoms of the disease are manifested in the deformation of the leaves, shoots, fruits. Fruits become gray, flattened and dry. The disease can destroy the entire landing.

Carriers of the virus are mites and aphids. First of all, carefully inspect the seedlings, insects may be on them, the treatment of raspberries in the spring with insecticides is desirable. This procedure will repel insects and save from many diseases. Sick bushes need to be disposed of in order not to spread the virus to the whole raspberries.

White spot

Septoria in raspberries is common. The fungal-type disease affects leaves and shoots of bushes with brown spots. Over time, the spots whiten in the center and spread throughout the bush, spores in the form of black dots cover the bark of the plant, causing cracks to appear on it. Because of the fungus, raspberry buds die, leading to crop failure. Remove damaged parts of the bush. Before the buds bloom, preventive treatment of raspberries with copper sulfate is necessary. 100 g of vitriol is diluted in a bucket of water; 250 ml of the mixture is enough for one bush. Spraying the soil around the bush will also be more effective.

Ring spots

The ring spot virus spreads pests - nematodes. These parasites can live long in the soil, settling in the root system of plants. To disinfect the soil there are drugs - nematocides. Work the soil before planting raspberries. The disease is difficult to detect. As the affected leaves curl in summer, they become dehydrated and are cut off by the wind due to fragility. You can only notice the symptoms of a lesion in spring or autumn: the deciduous mass of the raspberry turns yellow. Sick plant must be removed from the site.

Purple spot

Purple blotch or didimella appears as purple spots on the stems. The spots blot over time and change their color to a purple-brown color with a lighter center. The branches and buds on them at the same time do not develop, become brittle, and the raspberry dries. Affected plants need to be destroyed, and healthy process Bordeaux liquid.The first treatment is carried out when the young branches grow to 20 cm, the second - before the start of flowering. Carry out the last procedure after harvesting.

Ulcer spot

Ulcerative spotting is caused by a fungus that infects raspberry stalks with blurred brown spots. On the spots, ulcers spraying the fungus spores are formed. Fabrics of stalks and leaves become rotten, the bush dies. The main danger is that spores easily fall on healthy bushes that grow nearby. It is possible to get rid of the disease with the help of treatments with preparations containing copper. The affected parts of the plant must be removed and disposed of.

Bacterial root cancer

Raspberry root cancer is not easy to detect. The affected bush ceases to grow, the foliage and stems turn yellow, the fruits become small and tasteless. Detect the disease can be taken up by a hive transplant. The disease affects the root shoots of the plant, forming tumors on the main stem of the root system. Curing cancer is hard. If you find similar, treat the roots with a solution of copper sulfate, plunging the roots into it for ten minutes.

Raspberry mosaic

Raspberry mosaic is a virus in which leaves are deformed, losing color.Gradually, the whole bush begins to wallow. The newly formed shoots are weak and non-viable, the fruits shrink, lose taste. Mosaic is incurable. Sick plants are subject to destruction. For prevention, treat the soil against insects, as they are the carriers of the disease: aphid, mites and others.

Mealy dew on raspberries

Raspberry mealy dew grows well with high humidity. With the defeat of the disease on the leaves and stems, a white scurf of loose consistency appears. The leaves dry and fall, the raspberry berries take an ugly form, the stems become brittle. It is possible to treat the plant for powdery mildew with the help of copper-containing preparations.

Gray rot

Botrytis - a fungal disease of the plant, first the disease affects the fruit, covering them with dark spots. Over time, the spots grow, leading to rotting of the berries, then the fungus passes to the stem and then covers the stems with brown rings. Stems dry at the same time. Spots spread to the leaves, internodes, infect the plant buds.

Upon detection, it is required to remove all affected areas of the plant and burn it. In the spring, before the formation of buds, process raspberry Bordeaux liquid. Neither the winter on the soil should remain no remnants of diseased plants.

Raspberry rust

Rust on raspberry spreads at high humidity, before you deal with it, remove the affected parts of raspberry. Symptoms of rust are manifested by gray ulcers with a red border. On the inside of the fox, the fungus scatters spores - a dark-colored patina. If time does not get rid of the disease, it will save you from the harvest. Burn the diseased parts, treat the remaining bushes with copper-containing preparations or Bordeaux mixture.

Raspberry chlorosis

Raspberry chlorosis is easy to see but impossible to cure. Chlorosis is manifested in yellow spots spreading from the leaves and further along the branches. Raspberry fabric looks burned out. Berries shrink and lose taste.Closer to the fall, the symptoms are not visible, but make no mistake, the disease will overwinter and destroy the bush in the spring, and after it spread to the rest of the raspberries. Infected plants must be disposed of. Growing raspberries in these areas will be safe in ten years.

Preventive measures against raspberry diseases

Preliminary protection of raspberries from diseases is primarily the observance of the rules of agricultural engineering and crop rotation. Do not plant raspberries next to potatoes, strawberries and tomatoes. The worst predecessors for raspberries are strawberries, cabbages and solanaceous. It is best to plant after beans, beans, peas.

After harvesting, carefully clean the area from dried leaves and fallen branches. It is in them fungal spores winter. Do not thicken raspberries, so the disease passes from a bush to a bush easier.

With increased soil acidity, it is necessary to add gypsum when digging (120 g of powder per 1 m²). Cultivate the land from pests, remove weeds. Loosen and weed in rifle circles of raspberry bushes. Act with this very carefully, so as not to damage the plant, it will increase the risk of disease.

Preventive measures against raspberry diseases are in many cases the only plant protection. Observe the modes of watering and fertilizing. Reduce watering during rainy periods: a humid environment contributes to the development of many fungal diseases. Excessive use of nitrogen as supplements also reduces immunity to disease.

No wonder people say: what you sow, you will reap. Precautions and preventive measures will take you some time, but the result of your efforts will more than pay off the sweet harvest and useful preparations for the winter.