Twice a year you can enjoy raspberries. Ripening begins in early summer, the second stage of fruiting - in September, when raspberries can be treated up to the first frost. Crimson is an unpretentious plant, but it is also susceptible to various diseases .One of the most common - drying leaves, berries and shoots. In this article we will try to understand why berries, leaves dry and what to do in such cases, what are the methods of treatment.
Table of Contents
- Causes of Drying of Branches and Berries
- Why do berries dry up?
- Why do leaves dry and curl during fruiting?
- What is chlorosis and how to treat it?
- How to protect raspberries from pests and diseasesMost of the young plants are exposed to it, because with the growth of a bush, the young shoots crack. This contributes to the rapid penetration into the interior of the stem of the larvae of insects and phytopathogenic fungi, the main culprits of drying.
Cracked stems will be stronger if they do not get enough watering. Excessive fertilization of soil accelerators of growth will also affect the integrity of the branches, because they do not have time to become jealous.
- dry The disease caused by the reproduction of phytopathogenic fungi , manifested in the die-off of stems in early spring. After winter, the infected branches slowly grow and dry. If the plant lacks moisture, the process is faster. If you do not take action, you can lose more than half the stems and ovaries of raspberries.
- The culprit for the infection of raspberry bushes is the shoots galley. Getting through natural cracks, or mechanical damage inside the stem, it lays the larvae that feed on the bark of the plant and destroy its protective layer - periderm. This is the main barrier that prevents the penetration of phytopathogenic fungi inside the plant.
Shoots become the larva feeder. In the place of their greater accumulation of ulcers appear that prevent the spread of nutrients throughout the plant. This leads to the death of the upper part of the stem. The disease manifests itself as purple or dark brown spots on shoots.
Why do berries dry up?
Various viral diseases that spread cicadas and aphids contribute to the drying of raspberry berries. These sucking insects spread the infection from diseased plants. Diseases are different, but the result is the same for everyone - drying up the berries.
- In viral chlorosis, berries develop poorly, they do not have time to pick up juice and color, and as a result they dry out.
- With a yellow mosaic, , if the berry does not completely dry out, it develops one-sidedly and has a rather dry, unleavened taste.
- The curly is distinguished by its underdevelopment and drying. Bushes infected with this virus die for several years.
First of all, diseases affect harvest. Unilateral development of berries, their falloff and drying should be a signal for the start of emergency actions.
Why do leaves dry and curl during fruiting?
Viral and bacterial diseases of raspberries, spread by flying insects, provoke drying of the leaves, even during fruiting. Diseases that affect the berries, primarily affect the condition of the leaves and their development. The same viruses have a negative effect on the plant and yield:
- Viral chlorosis .Infected leaves begin to turn yellow, dry and curl in the midst of growth and flowering, along with berries, the shoots become small compared to healthy ones.
- Yellow mosaic .This disease is characterized by yellowing leaves with twisted dry edges. This is an insect-borne virus that manifests itself in late spring and mid-August.
- Curly .It is possible to distinguish healthy shoots from patients on several grounds:
Viral chlorosis Desiring a mosaic Curly
- growth retardation ;
- thickening in diameter;
- color change leaves to brown;
- leaf size reduction and drying.
What is chlorosis and how to treat it
The disease that often infects raspberry bush is chlorosis. Its by nature of origin is divided into:
- Parasitic , which is distributed by parasites, mainly aphids and mites.
- Non-parasitic , depending on the weather, planting conditions and content.
What does a bush affected by this virus look like:
- yellowing first in the center and then the whole leaves ;
- shoots become thinner and
- berries are pulled out or does not form at all, or half of them mature, and the other half dry.
Fight against chlorosis should begin immediately after planting. For this, there is a whole series of means for spraying a plant and protecting it from the sucking insects .If you want to harvest this year, then it should be processed in 2 stages:
At least 45 days should pass before the start of ripening raspberries after spraying.
- In early spring, , before blooming the kidneys, use 3% Nitrafen solution or 0.2% Nicotine-sulfate solution.
- Before flowering emulsion 30% Methyl mercaptophos.
If chlorosis was caused by adverse weather conditions, irrigation with cold water or lack of organic compounds, you should try to to correct the quality of plant care:
- normalize irrigation with warm water , it is better if it is river or lake, heated by the sun;
- to make the soil more fertile by introducing mineral fertilizers;
Remember that it is easier to protect against illness than to heal.
- soften the soil with forest floor or peat.
How to protect raspberries from pests and diseases
Mulching is one of the ways to protect .Protecting the roots of the plant, such a surface layer will allow the plant to get stronger and push the process of cracking the stems to a later date, when they become resistant to the disease. The layer of mulch must be removed when the first buds appear. The soil under it is always saturated with moisture, it can cause decay, dying of the kidneys and eventually drying out.Mulching is one of the most important conditions for preparing a plant for winter. It prevents freezing of roots and shoots, prevents the evaporation of moisture and protects against constant winds in some regions.
If you cut off the damaged stems in time, you can save part of the shrub. You need to cut off all areas covered with dark spots and small outgrowths of .It will be better to completely remove the entire "sick" escape.
Making the bush grow stronger and grow will help spraying, which should be carried out during the period of rapid growth of , at the beginning and in the middle of summer. Subjected to processing the lower part of the plant, from the ground level to 25 - 30 cm up. For this, Actellic mixtures are suitable - 0.2%, Fufanon - 0.3% and “Topaz - 0.1%.Fruiting raspberries should be sprayed with the same preparations before flowering and after harvesting. To preserve the integrity of the berries, after flowering, it is necessary to carry out 3 treatments with the “Phytoderm” biological product - 0.3% with an interval of 1 week.
Proper planting of young plants
From how the new bushes are planted, their resistance to the larvae of the shoots midge and viral diseases will depend.
- Young plants should be planted in a distance from the old bushes, which can be infected with larvae and fungi.
Roots need to be placed on a hard surface or placed in a metal grid, so as not to damage.
- It is necessary to rinse the roots under water pressure and wash all soil from them. Nearby it is recommended to dig a small hole, where water and soil remains will flow. Roots may contain non-sparse eggs of the shoots midge, which must be neutralized, i.e.bury.
- After landing, fully pruned raspberry stalks, even if planted in spring.
If possible, should cover the raspberries with non-woven material to prevent infection by viral infections that are spread by flying insects.
Spray Bordeaux mixture or other raspberry-approved chemicals once every 2 weeks. During this period, it is not the high yield that is important, but the strengthening of the stems and protection from pests and diseases.
If you decide to plant raspberry bushes in the garden, it is better to choose varieties resistant to parasites and infections. When purchasing, pay attention to the root system , which can be affected by a virus or insects. An important rule is to make every effort to grow a healthy plant, which will please more than one year with a rich and tasty harvest.
- dry The disease caused by the reproduction of phytopathogenic fungi