Raspberry leaves turn yellow in summer: what to do and why this happens

Photo: 2sotki.ru When a raspberry tree unexpectedly changes color or dries out, it urgently needs help. Raspberry leaves do not turn yellow just like that - in most cases this is an alarm signal. Unsuitable conditions, diseases, frosts or lack of fertilizers - all this affects the condition of the berries and the future harvest. Therefore, we have already found out why this happens!

Main reasons

Like all garden crops, raspberry leaves are immediately affected by a lack of water or sun. From high humidity they change color and rot, and from heat and dryness they dry out. A lack of nitrogen has a bad effect on the condition of green mass, but an excess of fertilizers also leads to various problems. But there are also fungi, infections and viruses, pests and other reasons!

Photo: bestlj.ru

How to save raspberries

If the raspberry leaves begin to turn yellow, it is first of all important to check the bush for diseases and pests . Even if there are no obvious signs, several preventive treatments are carried out with copper-containing preparations (copper sulfate solution).

If there are no signs of illness, care is reviewed . It is important that the soil around the bush does not dry out, but that the liquid does not stagnate. The soil is mulched. The plant is fed with complex mineral fertilizers. After a month, organic fertilizer is applied.

Attention! The reasons for the yellowing of remontant and simple raspberries are the same. However, plants that produce 2 harvests per year most often suffer from nutrient deficiencies. After harvesting the first harvest, comprehensive fertilizing is required.

If all care conditions are met and no signs of disease are found, but the raspberries still turn yellow, the bush is replanted after first inspecting the roots. Another way to save the plant is to carry out anti-aging pruning.

Leaves turn yellow at the edges

When the yellowness spreads from the edges and the ends dry out first, the problem is most likely in the wrong conditions.

1. The bushes have become too thick and they are simply cramped. Remember to thin out the seedlings as needed to keep them healthy.

2. Raspberries lack light, which provides photosynthesis with the presence of green plant pigment. Do not plant berries in the shade or between other tall plants.

3. Raspberries are resistant to moisture deficiency, but severe drought is also dangerous for them. In hot weather, raspberries need to be watered generously, 3-4 buckets at a time, about 6-7 times a season.

4. If the water for irrigation was too cold, the plant simply freezes. Use liquid at least at room temperature.

5. If the yellow leaves soften and begin to rot, the problem may be an excess of moisture. Do not plant berries in areas that are too wet. When watering, make sure that the soil is not too wet and, moreover, that puddles do not stagnate. Do not forget about regular loosening of the soil and good drainage.

Photo: 2sotki.ru

What to do when the raspberry leaves have already turned yellow?

Summarizing all of the above, let's make a checklist of necessary actions in the event of “trouble.” So, if the leaves on the raspberries begin to turn yellow, we:

1. We inspect the leaves for pests or rust. Medicines called acaricides will help against spider mites. Insecticides or less dangerous, but quite effective folk remedies can cope with aphids. Rust can be treated with fungicides, and success can be maintained with subsequent spring treatments with copper sulfate or Bordeaux mixture.
2. If the weather is dry and hot, water the raspberries once a week at the rate of 15 liters of water for each bush and mulch with sawdust, wood chips, grass, straw, etc. If, on the contrary, there are prolonged rains, mulch will also not hurt.
3. Spray with stimulants to increase immunity. Epin-extra, Zircon, Succinic acid and other safe preparations will help raspberries not only survive in stressful conditions, but also preserve the harvest.
4. We feed raspberries with complex fertilizer. For example, nitrophoska - 30-45 grams per 10 liters of water per square meter. Another option is 3 tablespoons of azofoska (Kemira or Ecofoska) per 10 liters of water. We feed at the rate of a liter of solution for each bush.
   If there is no complex fertilizer, you can dissolve 40 grams of potassium salt, 30 grams of ammonium nitrate and 60 grams of superphosphate in 10 liters of water. This is enough for a square meter of raspberry garden.

   Finally, for supporters of organic fertilizers, we offer a recipe for manure-ash fertilizer. To prepare it, fill a third of the bucket with droppings or manure and add water. Let the infusion stand for 2 days. Then it needs to be diluted with water (1:10), and a glass of ash should be added to each bucket of diluted fertilizer.

5. We compare the visible picture with the signs of disease. If all our efforts do not bring results, there is only one thing left - to destroy the diseased plants. To improve the soil, plant the area with lupine or other green manure, and replant the raspberries in a different place.

Raspberry seedlings turn yellow

After planting, the seedlings grew well, blossomed, and then suddenly began to turn yellow and dry out? In addition to the standard reasons, several new ones are added:

1. It is possible that the rhizomes were damaged or affected by a fungus during planting. They should always be carefully examined and treated with antiseptics.

2. In pursuit of nitrogen fertilizers, novice gardeners often forget to apply potassium on time. And it is also vital for young seedlings.

3. Poor land preparation leads to the same consequences. This is acidity, insufficient nutrition, too dense and not loosened soil.

4. In swampy areas or where groundwater is close, yellowing of raspberries is inevitable.

Photo: malinaexpert.ru

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Improper care of raspberries

Many gardeners look for the reasons for the yellowing of raspberries in some diseases or pests, but then it turns out that the problem is a failure to follow the rules for caring for the bushes.

• With a lack of air and light, the foliage begins to turn yellow and then dry out. This is most often observed in dense plantings. In this case, it will be necessary to thin out the plantings. The number of waterings is reduced, but water consumption is increased. For each bush you need to allocate at least 15 liters.
• Drought can also affect the color of the leaves. To restore their color, it is necessary to provide the raspberries with better watering with warm, settled water. It is best, of course, to take rainwater, but this is not necessary. The main thing is that it is clean, not cold and not hot.

Interesting!

The reason why raspberry leaves turn yellow may be not only drought, but also high humidity. Frequent watering washes out nitrogen, potassium, and phosphorus from the soil, causing nutrient deficiency. As a consequence, yellowing of the leaf plate and dying off of the pagons.

High acidity of the soil is observed with excessive fertilization

• High acidity of the soil is observed with excessive fertilization with various minerals. But raspberries do not tolerate high acidity and react by yellowing of the leaves. If this happens, you need to check the acidity of the soil. The normal value is 5.9-6.1. In case of increased acidity, you need to add dolomite flour or chalk (0.5 kg/1 m²) and slaked lime (400 g/1 m²) to the area.
• Low soil nutritional value and lack of elements can be the reason why raspberry leaves turn yellow. For example, with a lack of nitrogen, the leaves turn yellow and become smaller, and the development of runners is inhibited. If there is not enough iron, the leaves turn yellow, but the veins remain green. A lack of magnesium is expressed in yellowing and rapid drying of foliage. And with a zinc deficiency, small spots appear on the yellow leaf. Depending on what elements the crop lacks, it is necessary to apply one or another fertilizer to the bushes.

Raspberries react differently to improper care. Yellowing of foliage is one of the possible reactions of the crop. Therefore, proper care for raspberries is very important. The bushes can grow even with insufficient care, but they will often get sick, and the quality and quantity of the harvest will decrease. So, it is in the interests of every gardener to carry out timely watering, pruning, pest control and other care measures.

Leaves turn yellow and dry from bottom to top

It happens that after a cold spring, the leaves begin to turn yellow, dry out and fall off from the bottom layer. It may simply be a stress reaction that will go away on its own. This happens, for example, with greenhouse berries if you forget to close the greenhouse door.

But if the symptoms do not stop and the disease rises higher and higher, it is most likely verticillium wilt. To avoid it, adhere to crop rotation, always disinfect planting material and do not forget seasonal treatment with fungicides.

Photo: distano.ru

How to preserve a plant and prevent it from yellowing

Often the reasons for the yellowness of raspberries is that the crop was planted in the wrong place or the gardener purchased low-quality varieties. It is for this reason that you should give preference to good varieties of aromatic berries.

In this case, it is better to fork out money and buy high-quality planting material than to fight diseases later.

If your raspberry tree has turned yellow, then you should not immediately resort to drugs of chemical origin, in this case it is better to use gentle means, but in the case when the defect has begun to progress, you should not spare the money spent and try to cure the plant.

It’s better to get rid of it right away by simply uprooting it and burning it. If you do not act in this way, the disease will spread to healthy bushes and in this case there will be nothing to save.

Source

Leaves turn yellow and grow poorly

If the leaves grow smaller, less frequently, longer, or become deformed, the problem may be in the composition of the soil. Not every soil is suitable for raspberries, and they need regular feeding.

1. Leaves turn yellow due to a lack of magnesium, iron, zinc, boron or other beneficial substances.

2. Chlorosis and crushing develops due to too acidic or too alkaline soil. Alkaline soil must be acidified with potassium sulfate, and acidic soil must be diluted with lime, ash or chalk.

3. Raspberries will react quickly if you forget about mineral additives - chelates, sulfates, dolomite flour, complex seasonal fertilizers.

Photo: stroy-podskazka.ru

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Reasons for yellowing of raspberry leaves in summer

Yellowing of raspberry foliage in summer or spring is not natural. The condition of the bush is judged by the color of the leaves. Yellow and dry spots are often the result of :

• lack of nutrients;
• improper care;
• diseases;
• pest attacks.

In most cases, if the cause of yellowing of the leaves is eliminated, it is possible to save the raspberries . If the problem is advanced, replanting and pruning of the damaged part of the bush will be necessary. If the plant has completely shed its leaves and its shoots have dried out, it means it has died. In this case, the bush cannot be restored.

Sometimes yellowed leaves indicate that the bush is infected with a viral infection. Viruses cannot be cured. To save healthy plants, the affected ones will have to be removed from the site.

Nutritional deficiencies

Deficiency of micro- and macroelements leads to improper plant development . The appearance of the leaves determines which substance is missing.

Note! If the fertilizer application schedule is followed, problems with a lack of nutrients do not arise.

With a lack of nutrients, yellowed leaves appear in the summer, usually in June or July. Their appearance depends on the type of deficiency :

1. Nitrogen . With an insufficient amount of nitrogenous fertilizers, the development of the plant slows down and its growth stops. The substance is responsible for photosynthesis, so its lack leads to shredding, paleness and yellowing of the green mass. To save the plant, it is fed with nitrogen-containing agents, for example, ammonium nitrate.
2. Sulfur . Its deficiency is expressed in uniform blanching and then yellowing of the leaves. Over time, the petioles become thinner and fall off.
3. Iron . Iron deficiency is called chlorosis. Outwardly, its symptoms are very similar to those of jaundice, a viral disease. With chlorosis, the leaves first turn pale green and then pale yellow, while the veins remain green. For treatment, preparations containing iron are used, for example, iron sulfate.
4. Magnesium . With a lack of magnesium, the leaves turn yellow, wither, dry out and fall off prematurely. At the same time, spots appear in the center of the leaf plate, the edges turn yellow and curl. To get rid of the problem, apply magnesium fertilizers, for example, magnesium sulfate.
5. Calcium . When it is severely deficient, the edges of leaves and shoots become brown and die. If the problem is not very advanced, white or light yellow stains and stripes appear on the leaf plates.
6. Bor . With its deficiency, small dry spots appear, which gradually increase in size. Hollowness of shoots is observed. Yellowed leaves appear that quickly dry out. Boron deficiency often occurs due to a lack of potassium.
7. Zinc . Gray-yellow spots appear on the leaf blades. Their number increases rapidly and they merge. The greenery is crumbling.

There are two ways to combat the lack of nutrients . The first option is to use only the substance that the plant needs. To do this, it is important to correctly identify the type of deficiency, since an excess of some substances is also dangerous. An easier way is to use complex fertilizers.

Diseases

Another reason why raspberry foliage turns yellow is disease. Most infections kill the plant without timely treatment; some are not treated at all. When one plant is infected, the infection is quickly spread by wind and insects to other crops.

Diseases are most effectively treated in the early stages. The more advanced the infection, the higher the likelihood of raspberry death.

Infectious chlorosis

Viral chlorosis is also called raspberry jaundice. Symptoms of the disease resemble iron deficiency. The problem is identified by the following signs :

1. Yellow leaves appear on young growth and two-year-old branches. On the shoots, the leaves at the top suffer the most. In this case, at first the veins on the yellow leaf plate remain green, but then they also turn yellow. The foliage gradually becomes smaller, but its shape does not change.
2. Shoots, fruit petioles, stalks, sepals, and fruiting brushes acquire a yellow tint. Annual shoots stretch out and become weak.
3. The berries of the affected plant also change - they become smaller, become less juicy, and have an unexpressed taste.

The symptoms are most pronounced at the time of fruit set and ripening , and after harvesting the crown turns green and the symptoms practically disappear. The disease makes itself felt again in the fall. The next year everything repeats itself.

The viral disease cannot be treated . If its signs are detected, the raspberries are dug up, taken away from the site and burned.

To prevent infection, follow the rules of prevention:

1. Choosing healthy planting material. It is better to choose varieties with resistance to jaundice.
2. Timely prevention and elimination of pests. The bushes are regularly inspected and treated with products to combat aphids and spider mites, which contribute to the spread of the disease.
3. Sanitary pruning. Remove shoots that thicken the crown, dry and old branches, and parts of the plant with damaged bark.
4. Compliance with the schedule for applying mineral and organic fertilizers. This boosts the raspberry's immunity.
5. Planting a raspberry tree in an area where the same crop grew no less than 5 years ago.

Root cancer

Root cancer is also called root goiter .
This is a bacterial disease that is provoked by a dry climate, alkaline soil, and long-term cultivation of shrubs in the same place. Bacteria enter the plant structure through cracks in the roots. Growths with a diameter of 10 to 12 cm form on the root shoots. Sometimes they also touch the root collar. Galls (as the growths are called) have an irregular shape, at first they are soft, then gradually harden.

Due to root cancer, the roots stop fully absorbing liquid from the soil . The plant begins to suffer due to a lack of nutrients: the leaves turn yellow, wither, dry out, new shoots develop poorly and become short, the fruits become smaller and lose moisture.

Advice! To make sure the diagnosis is correct, dig up the raspberry roots and check for growths.

Root cancer cannot be cured . Affected plants are dug up and burned. The soil on the site is treated with copper sulfate to prevent infection of other plants. Other shrubs cannot be planted in a place that has been affected by the disease for 3 years. It is better to plant it with lupine to improve the soil.

To avoid infection , the soil and roots of the planting material are treated with copper sulfate before planting. In the fall, the garden is cleaned. Be sure to check the acidity of the soil.

Rust

Rust is a fungal disease . Carried by coniferous trees and some weeds. Fungal spores are especially active in warm and humid weather.

Symptoms of rust:

1. In the second half of spring, the inner side of the leaf blades is covered with small red pads with spores. Small yellow spots form on the outside.
2. Gradually, the spots and pads with spores increase in size.
3. The pads burst and spores come to the surface. Some of them cover the entire lower surface of the leaves, the other part scatters throughout the garden.
4. Leaves infected with rust dry from the edges to the center.

The productivity of the raspberry bush decreases, the fruits become tasteless . The winter hardiness of the plant is significantly reduced.

Fighting methods:

1. The most affected leaves, which have already begun to fall asleep and are covered with a thick spore layer, are torn off.
2. The plant is treated with fungicides (Topaz, HOM) according to the instructions. Typically re-treatment is required at intervals of 2-3 weeks.
3. To prevent the disease, before the buds bloom, the bush is sprayed with a solution of copper sulfate (1 tablespoon per bucket of water) or Bordeaux mixture.

Ring spot

Ring spot is another viral disease. Its first signs appear a year after raspberry infection :

1. Pale yellow or yellow-green ring-like patterns appear on the leaves. This usually happens in the first half of summer. At the end of July - August, the signs often disappear, but by autumn they appear again.
2. The bush or individual shoots lag behind in development. The branches become short and brittle and die quickly.
3. The fruits are undeveloped and dry out quickly. Sometimes, against the background of the disease, new ovaries begin to develop in the fall.

The disease cannot be cured . The affected raspberries are dug up, removed from the site and burned. To prevent the appearance of ring spot, varieties resistant to it are grown and only healthy plants are planted. The soil is treated against nematodes, possible carriers of the disease.

Late blight

Late blight is a fungal disease that affects the roots of raspberries . For a long time the disease practically does not manifest itself. Only in advanced stages does the foliage quickly turn yellow, and soon the bush dies.

To treat the disease, water the soil around the raspberries with a solution of copper sulfate or fungicides diluted according to the instructions. In this case, folk remedies are ineffective, since the disease makes itself felt in the later stages of development. To prevent infection, preventive treatment with copper sulfate is carried out.

Curly

Leaf curl is a viral disease that can kill an infected plant within 3 years. The disease is recognized by the following signs :

1. The leaves become hard and small, deformed, and look wrinkled. The underside becomes brown.
2. The leaves turn inward. This makes the plant look curly.
3. The berries turn out sour and dry, and are deformed.

Bushes affected by curling cannot be treated . These raspberries are dug up, taken away from the site and burned.

Pests

Pests often cause yellowing of leaves . Typically, this effect occurs when attacked by insects sucking juice from greens.

Aphid

These small insects settle in whole colonies on young shoots and leaves of raspberries . They come in green, brown, gray and black. There are individuals with and without wings.

Aphids suck the sap from the plant. Affected leaves wither, turn yellow, dry out and fall off . It is easy to detect the pest by examining the raspberries.

To get rid of aphids, the affected shrub is treated with insecticides (Karbofos) or folk remedies:

1. Soap-ash solution. A grated piece of laundry soap and 1 kg of ash are dissolved in a bucket of water. The product is allowed to brew for a day, then used for spraying. It is recommended to water the soil around the bush.
2. A decoction of bitter herbs: wormwood, dandelion greens, yarrow.
3. Onion-garlic solution. Grind 0.5 kg of onion and 0.2 kg of garlic in a meat grinder. The pulp along with the peel is poured with a bucket of water and left for 3 days. Then the affected plants are filtered and sprayed.

Spider mite

Another pest is the spider mite. These are small insects that are black, green, yellow or red .

Advice! To spot mites, look at the underside of the leaves. On them you can see a cobweb containing pest larvae.

Affected foliage curls inward , turns yellow and withers.

They fight spider mites like aphids . Use insecticides or folk remedies.

Agrotechnical errors

Although raspberries are a hardy and unpretentious shrub, violation of agricultural practices affects its condition . The problem arises with improper care, incorrect selection of a site for planting, or unfavorable climatic conditions.

Agrotechnical errors causing yellowing of leaves:

1. Bush thickening . This error causes poor air exchange, insufficient supply of nutrients, stagnation of moisture on the leaves, which provokes yellowing of the foliage and fungal infection. Annual sanitary and formative pruning and maintaining a distance of at least 1.5 m when planting will help avoid the problem. When the bush thickens, thin out the crown, removing all branches directed inward and root shoots.
2. Lack of moisture . In this case, the leaves begin to turn yellow and fall off. In dry summers, raspberries are watered once every 1-2 weeks, spending 10–30 liters of water per bush. Mulching the tree trunk circle will help reduce the number of waterings and reduce the risk of fluid deficiency.
3. Increased soil acidity . Slightly acidic soil suits raspberries. If acidity levels are elevated, add dry alkali or ash at the rate of 1 kg per 1 m².
4. Excess moisture . The problem often occurs during periods of prolonged rainfall. Mulching the soil and watering it with a solution of copper sulfate will help save the plant. Excess liquid often leads to leaching of useful substances. In this case, additional fertilizer will be required.

Leaves turn yellow and fall off

If there are no other symptoms, everything is fine with the soil and watering, and the raspberries are definitely not getting sick - the problem may be a cold snap. The berry is very sensitive to decreased air and soil temperatures. Therefore, during unexpected frosts in the middle of the season, it is recommended to cover the seedlings.

Photo: liveinternet.ru

The effect of soil on raspberries

Why raspberries turn yellow is determined by the composition of the soil. If it is not possible to conduct a laboratory analysis, then the appearance of the bushes will indicate a lack of nutrients in the soil. For raspberries, the presence of iron, magnesium, zinc, and boron in the soil is important. A lack of elements, as well as increased acidity or alkalization, causes yellowing (physiological chlorosis) and shredding of the leaves. This does not lead to the death of raspberries, but it reduces yield and worsens the taste and appearance of the berries. Applying fertilizers will help correct the situation. If there is a lack of iron, raspberries can be saved by adding ferrovit or iron chelate. Dolomite flour and magnesium sulfate will help prevent magnesium chlorosis.

If it was not possible to accurately determine the composition of the soil, raspberries can be fed with the following fertilizers:

If the soil is too alkaline, add potassium sulfate under the bushes. Sometimes in these cases, digging and loosening the soil between the raspberry bushes is enough. Acidic soil is deoxidized by adding chalk, lime, and wood ash.

Attentive attention and timely measures taken will help protect raspberry leaves from yellowing and drying out if they are non-infectious in nature. Infectious and viral causes of raspberry drying are much more dangerous.

Leaves turn yellow towards the end of the season

At the end of the season, yellowing of the leaves is a normal natural process. The life cycle of any plant ends, and it gradually goes into a dormant state, and for this you need to get rid of excess leaves. Only spring and summer yellowing is abnormal.

Photo: 2sotki.ru

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Preventive measures

To prevent premature yellowing of raspberry leaves, it is important to create optimal conditions for it. Prevention rules :

1. Selection of healthy seedlings . Before planting, they are inspected for traces of diseases and pests: spots, holes, cracks in the bark, distortions, growths on the shoots and root system.
2. Disinfection of seedlings, soil and garden tools . Preventive treatment with copper sulfate solution in the spring before buds open and during the rainy season.
3. Timely watering , mulching the soil to prevent moisture stagnation.
4. Apply fertilizers at least 3 times a year. Raspberries are usually fed in spring, summer and autumn, before wintering.
5. Formative and sanitary pruning . Cutting out root shoots.
6. Autumn garden cleaning . Remove and burn fallen leaves and other plant debris.

The leaves turn yellow in spots and dry out

If the leaf blades are covered with chaotic spots of all shades of yellow, red or brown, this is a sure sign of disease. In most cases, such bushes need to be destroyed, and the soil should be treated with antiseptics and left for a couple of years. Here are some of the most common problems:

1. Root cancer appears after drought, when the root system is damaged or in too alkaline soil. Bacteria spread faster if raspberries are grown in one place for years. Tumor growths gradually form and destroy the planting.

2. Rust is a fungus and a consequence of too high humidity in the heat. Not only the leaves deteriorate, but also the crop, and winter hardiness also drops significantly.

3. With chlorosis, the leaves turn yellow along the veins, and only then the disease gradually covers the entire blade. When planting, choose resistant varieties and do not forget to carry out seasonal treatment with insecticides.

4. Mosaic is a whole group of viruses that are spread by garden pests. Yellowing is the least of the troubles from an incurable disease. Lumps and rough irregularities appear on the surface of the plates.

Photo: violet-bryansk.ru

How to deal with plaque on leaves?

After determining the cause of yellowing leaves, it is necessary to take measures to eliminate the problems. If the plant is infected with a virus, the bush cannot be saved and will have to be uprooted. In other cases, the plant needs emergency assistance.

By medication

To treat fungal and bacterial plant diseases, the industry produces a variety of chemicals. The most effective drugs containing copper are:

• Home;
• Oksikhom;
• Ridomil Gold;
• Speed;
• Abiga Peak;
• Bordeaux mixture;
• Copper sulfate.

Important! Treatment of bushes with chemicals can be carried out only during bud break, before flowering and after harvesting. Spraying during berry ripening is dangerous because harmful substances penetrate the fruit.

Folk remedies

During the formation of ovaries and ripening of berries, fungal diseases of raspberries can be treated exclusively with folk remedies. According to experienced gardeners, garlic extract is the most effective. The product has fungicidal and disinfectant properties. It slows down the growth of fungal spores in the early stages and at the same time repels disease-carrying pests.

The extract is prepared according to the following recipe:

• 500 g of garlic are turned into pulp and 3 liters of water are added;
• after an hour, the liquid is drained, and the slurry is diluted again with the same amount of water;
• The solutions are combined and the volume is adjusted to 10 liters.

The bushes are sprayed with the product 3 times with an interval of 5 days.

Experienced gardeners advise pouring boiling water over raspberry bushes in early spring. This will help rid the plant of insect larvae and pathogenic microorganisms. An alternative treatment method is to spray the bushes with birch tar before the growing season begins.

For your information! After treatment with chemicals or folk remedies, the bush is fed with mullein or chicken droppings. The plant will come to life and begin to grow new shoots and green leaves.

Leaves turn yellow and dry out due to pests

Garden pests carry infections and viruses that can destroy the entire planting. They eat leaves and shoots, suck out the juices from them, and the plates begin to wither and turn yellow.

1. Aphids are the most dangerous carrier of mosaic and other incurable viruses. Usually it hides on the inside of the plates and seems to leave a coating on the surface.

2. Berry weevils eat leaf cuttings, which is why they cannot grow normally. Later, the pests move on to the buds and pedicels.

3. Caterpillars of various butterflies eat holes in the shoots and pupate. Weak and diseased leaves grow on damaged branches, the shoots do not bear fruit, and then completely dry out.

4. Spider mites leave a whitish coating on the leaves and drink the juices from them. First, the plates become covered with small yellow-brown dots, then they wither and dry out.

Photo: frukti-yagodi.ru

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Pest attack

Sucking pests can be found on raspberry shoots that have turned yellow. They feed on the cell sap of plants, which over time leads to the appearance of yellowing and drying of the leaves. Both pests appear in hot weather when the air is dry. As a rule, such weather conditions are observed during the flowering period of the crop and the formation of the ovary.

To get rid of pests, you should immediately spray the plants with a soap solution. As long as the instances are single, this method is very effective. Soda solution and garlic infusion are also used. If time is lost, only special preparations - insecticides - will allow you to get rid of numerous colonies.

Note: Ants are carriers of aphids. Therefore, in order to get rid of harmful insects, the latter should not be allowed on the site.

What causes yellow dots to appear?

In some cases, the leaf plate begins to change color gradually. First, yellow spots appear, then the leaf begins to dry out and die.

Viral and fungal diseases

Yellow dots, spots and characteristic pads occur with the following diseases:

Bush thickening

The most common cause of yellowing that occurs among inexperienced gardeners is too thick a bush. The extra shoots that beginners leave, hoping to get additional berries, interfere with the ventilation of the bushes. They also limit the access of sunlight to the interior space. As a result, photosynthesis processes are disrupted and the plant begins to wither.

Lack of moisture

Insufficient and untimely watering of raspberries disrupts the nutrition of the aboveground part. A situation with a lack of moisture can be provoked by frequent but meager watering. The gardener is sure that the soil is sufficiently moistened, but the water does not penetrate deep and the root system dries out. At temperatures above 25°C, lack of moisture can completely destroy the bush in 30-40 days. It simply begins to dry out.

Lack of batteries

The change in leaf color is also directly affected by the lack of fertilizer. Yellowness is caused by a lack of:

Increased soil acidity

Growing raspberries in areas with high acidity of the soil is contraindicated. High rates lead to slower development of the root system. Which contributes to a lack of nutrition of shoots and leaves.

To lower it into the ground add:

Why do raspberries dry out in spring?

If raspberries dry out in the spring without blooming, and the bushes subsequently die, this may be caused by a pest such as shoot gall midge. When they get inside the stem, its larvae eat the plant bark and destroy their protective layer, which prevents the penetration of phytopathogenic fungi.

To protect against insects, drugs of the peritoid group with a wide spectrum of action are used - Calypso, Mospilan, Iskra and many others.

Another reason why raspberries dry out in the spring is purple spotting. Its appearance can be recognized by spots of a characteristic color at the base of the leaves. To prevent the disease, you should choose varieties that are resistant to it, thin out the raspberries and avoid mechanical damage to the shoots.

Before buds open, plants need to be treated with a 3% solution of Bordeaux mixture. Before flowering and after harvesting - with a 1% solution.

Drying of berries is caused by a variety of viral diseases, carried by cicadas and aphids. These include chlorosis, yellow mosaic and curliness.

Botanical description

The sinuous woody rhizome of raspberries forms many adventitious roots, due to which the raspberry root system becomes powerful and very branched. Erect stems reach a height of one and a half to two and a half meters. The shoots of the first year are herbaceous, juicy, bluish-green, covered with frequent, thin, small thorns. In the second year, the shoots become woody and brown, and after fruiting they dry out, but new green stems grow instead the following spring.

Raspberry leaves are petiolate, alternate, compound - with three to seven oval leaflets, the upper side of the leaf blade is dark green, and the lower side is whitish due to the fine hair growing on it. Small racemose inflorescences of white flowers about one centimeter in diameter are located in the axils of the leaves or on the tops of the stems.

The raspberry consists of small, hairy drupes that grow together to form a complex fruit. The most common varieties grown are red raspberries of various shades, but yellow raspberries and even black raspberries are also cultivated. After planting, raspberries usually begin to bear fruit the next year; in the first year, flower buds are just laid on its stems, from which then, from the next spring, fruit branches develop. However, today, thanks to the efforts of breeders, there are remontant raspberry varieties that bear fruit on the shoots of the first year.

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Raspberries attract many insect pests that parasitize on them, and they also have many dangerous diseases. Proper planting and care of raspberries strengthens the plant's resistance to diseases and insect parasites. We will tell you not only about how to deal with raspberry enemies, but also about preventive measures that will protect your raspberry tree from the penetration of harmful insects and pathogens.

Fighting raspberries

How to deal with raspberries? All raspberry varieties produce basal shoots - some less, others more. This shoot spreads throughout the raspberry forest, and if you don’t care, it will even end up where it shouldn’t be. The easiest way is to trim unnecessary shoots with a sharp shovel to a depth of ten centimeters, but leave them in the same place where they will gradually dry out. In order to protect the garden from raspberry shoots entering it, the raspberry patch is fenced with pieces of slate dug into the ground to a depth of 35-40 cm.

You can also plant garlic or sorrel, or even better, beans, around the raspberry bushes, and this measure can stop the growth of the shoots. If you grow raspberries on your plot not in a strip, but in a bush way, then you can plant them in barrels or buckets dug into the ground without a bottom, and then the root system will not grow in breadth and, therefore, will not be able to produce shoots. It has been noticed that applying nitrogen fertilizers not in spring, but in autumn, significantly reduces the number of root shoots.

Useful tips if raspberries disappear

Compliance with agricultural practices for growing this crop and a number of preventive measures will help prevent the spread of most diseases in the raspberry garden:

• In the fall, the area is cleared of last year's foliage, the soil under the raspberries is loosened, fertilizer is applied and treated with Bordeaux mixture. When acidity increases, this indicator is brought up to the standard by adding gypsum to the soil.
• In the spring, plants are pruned, the soil is loosened, fertilizers are applied, and the bushes are sprayed with Bordeaux mixture.
• During bud break, budding and before flowering, raspberries can be treated with insecticidal and biofungicidal preparations.
• Remontant raspberries are sprayed with Topaz (2 ml per 10 liters of water) in early May. At the end of May, they are treated against pests with “Actofit” (4 ml per 1 liter of water) or “Lepidocide” (20-30 g per 10 liters of water).

More recommendations on what to do if raspberries dry out will be given by an experienced gardener in the following video:

With proper and timely care, you can get rid of such a problem as drying out of the raspberry bush. Preventing a disease is easier than treating its consequences. After all, serious infections of raspberries, such as fungal infections, can completely destroy the bush.

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The danger of raspberry chlorosis

It is not difficult to recognize chlorosis in a timely manner, but not every gardener can determine the cause of the damage. Non-infectious ones are easy to eliminate, but infectious ones are difficult to fight. I confess that if there are at least two weeks before harvest, at the first signs of yellowing, just in case, I carry out preventive treatment against viruses. When the berries are ripe, I try to use mechanical methods. Doing nothing is dangerous.

An infection that disrupts chlorophyll synthesis is not afraid of frost. If measures are not taken, there will be a relapse in the spring, then goodbye, berries!

The causative agents of the disease are carried by insects. The virus, entering through the leaves, penetrates the roots of the bush. The plant begins to wither before our eyes. I immediately throw out such bushes so as not to infect the neighboring raspberry fields. I water the soil with potassium permanganate. If this is not done, the entire plantation will die in a couple of years.

Increased soil acidity

Normally, the soil should have a normal acid-base state. If the pH drops below 5, acidification occurs. This is the reason for inhibition of root growth and deterioration in nutrient absorption. The plant is susceptible to diseases spread from surrounding bacteria and fungi.

Acidity increases due to the following factors:

• abundant watering or prolonged rains, which carry away salts, depleting the soil;
• long-term application of identical mineral fertilizers with an acid component;
• excessive content of hydrogen and aluminum ions in the soil with incomplete neutralization.

Interesting! If the pH of the soil is disturbed, fertilizing, irrigation, and other methods will not help. It needs to be deoxidized.