It is important to systematically inspect the plantings of raspberries. This will help to timely notice the signs of the development of dangerous diseases. If left unchecked, they can result in the loss of a significant portion of the crop.
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1. Gray rot
You can identify a dangerous fungal infection by the appearance of dark brown marks on the edges of the leaf plates. As they develop, a gray mold forms on them. If you do not take control measures, the rot spreads to the berries.
It is recommended to pollinate the surface of the soil and the lower parts of the stems with lime fluff for the prevention of gray rot at the stage of the beginning of fruiting. It can be used as a mulching material with needles, which have a depressing effect on the fungus. Ash infusion is used for spraying the soil.
The affected stems are immediately cut and burned. Raspberry after the end of the collection of berries is treated with biofungicide "Apirin-B".
2. Anthracnose
In warm, humid weather, the fungus appears as early as June. It is easy to distinguish it by the purple markings at the bottom of the young shoots. As the disease progresses, the stems of raspberries die off and the berries begin to rot.
It is necessary to destroy the affected shoots and fallen leaves. In order to prevent infection, raspberries are irrigated in spring with a solution (1%) of copper sulfate. For treatment, special fungicides are used, for example, "Kuproksat", "Oksikhom". In autumn, a solution (1%) of Bordeaux liquid is used for spraying.
3. White spot
A characteristic sign of the appearance of a dangerous fungal disease is a scattering of brown small specks on the surface of the leaf plates. Gradually they take on a white tint with black dots and a purple rim. The fungus spreads to the entire aerial part, leading to its death.
To prevent infection, you need to remove organic residues, avoid dense plantings. In the spring, before pecking the buds, irrigate the raspberry with a solution (1%) of Bordeaux liquid. You can use copper oxychloride at a concentration of 0.5%. For treatment, "Fitosporin" is used.
4. Rust
It is possible to determine the defeat of the raspberry by this fungal disease by the formation of yellow convex nodules on the leaf surfaces. As the infection spreads, the stems become covered with ulcers with a reddish border. Shoots break easily and leaves fall off.
For prophylaxis in the fall, the bushes are treated with sulfur. In the spring season, before bud break, the plants are irrigated with a solution (3%) of Bordeaux liquid. You can use potassium salt by preparing a disinfectant solution with a concentration of 2%.
It is necessary to remove weeds, organic residues in a timely manner, cut out layers with traces of rust. For treatment, apply in accordance with the instructions "Topaz", "Oxyhom", "HOM". Will help "Bayleton", "Ordan", "Fitosporin".
5. Verticillary wilting
A dangerous fungal disease can be seen on raspberries due to the untimely drying of the leaves, which spreads from the lower part of the shoots. The stems become covered with bluish marks, stop growing, and then die.
To prevent outbreaks of infection, do not place eggplants, tomatoes, potatoes, strawberries, peppers near the raspberry. At the first signs of the disease, irrigation of plantings with "Vitaros", "Previkur", "Topsin-M" is practiced. Severely affected bushes are uprooted. The soil is removed to a depth of 30 cm and fresh soil is added.
6. Mosaic
The carrier of a viral infection is often aphids. The leaves of the infected plants acquire a mosaic yellow-green color. The shoots gradually become thinner, the ripening berries become smaller and lose their aromatic taste.
To save the raspberry, it is necessary to destroy the pests in a timely manner. Shoots with signs of infection are immediately cut out and burned. Weeding should be done regularly. Feeding with rotted compost, potassium salt, superphosphate is required.
7. Purple spot
More often, you can notice dark purple blots on young raspberry shoots in places damaged by gall midge - a dangerous pest. Gradually, the spots grow and acquire a brown color. The disease then spreads to the leaves. Parts of the plant affected by the purple spot dry out.
In order to prevent the development of the disease, a dense planting of raspberries is excluded, weeds are regularly removed, and the soil is cleaned of organic residues. In early spring, while the buds have not blossomed, the berries are irrigated with a solution (7%) of urea. Infected bushes are sprayed with "Fundazol", "Fitolavin", "Topaz".
8. Powdery mildew
A characteristic feature of the fungus is a whitish dusty coating, which gradually covers the entire aerial part of the plants. Growth slows down, yields decrease.
It is necessary to immediately remove and destroy all affected bushes. The soil is replaced to a depth of 10-15 cm and sprinkled with ash. Plants are irrigated with Bayleton, Topsin-M, Previkur. For prophylaxis, berries should be treated with "Phytocide", "Fitosporin", "Baktofit".
Fragrant raspberries will delight you with their great taste if you take timely measures to prevent or treat dangerous diseases.
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