Redness of raspberry leaves than to process. Why do raspberries have light green leaves? Lightening of the leaves between the veins at the base of the shoot

For many gardeners, the condition of the crops in the garden is very important: the stems, leaves, and roots - everything must be in perfect condition, because only from healthy plants can you get a sufficient amount of crop and healthy offspring. Raspberries are a horticultural crop that many grow, and all because it does not require special care, usually rare feeding and timely cutting of the stems is enough for the plants to be rewarded with tasty and sweet berries every year.

Causes of reddening of raspberry leaves

There are several reasons why bright red spots appear on the surface of the foliage.

Phosphorus deficiency

Phosphorus is considered the main nutrient that is needed for the development of the raspberry bush. The lack of this component negatively affects the fruiting and flowering of seedlings. The first signs of phosphorus deficiency appear in the spring, when buds should appear on the stems of the bushes. In plants that lack phosphorus supplements, buds appear with a delay.

Also, a deficiency of phosphorus is evidenced by the fact that flowers with buds fall off the seedlings.

Leaf plates are covered with dark spots with a red tint. Gradually, all the affected foliage is deformed and begins to dry. Only phosphorus-containing feed mixtures can save plants.

fungal diseases

Another reason why raspberry leaves turn red and dry is the development of fungal diseases. Common diseases that are caused by a fungus include:

Anthracnose. A common pathology that affects not only raspberries, but also other horticultural crops. Symptoms of the disease appear on foliage, berries, buds and stems. In order to timely identify anthracnose, it is necessary to examine the sheets. Small dots of a reddish hue appear on them, the size of which gradually increases.
Septoria. A disease that most often appears on raspberry bushes. First, the lower leaves are covered with red spots, but then the bush begins to dry.
Verticillosis. This is a dangerous disease, due to which the yield is reduced by 2-3 times. Symptoms of verticillium include drying of the leaves and cracking of the stems.

insect pests

The reasons for the development of red spotting include the attack of pests on seedlings. There are several insects that often appear on raspberry bushes:

Gallica. This is a small yellowish mosquito that damages the foliage and stems of horticultural crops. Reddish dots form on damaged areas of plants. If the gall midge is not eliminated in time, it will damage more than 80% of the shoots..
Nutcracker. When this pest damages the leaves, reddish swellings appear on their surface. Damaged foliage cracks and dries.
Aphid. The most common pest that appears on all garden and horticultural crops. First, the aphid damages the inflorescences and young shoots. However, gradually the number of pests increases throughout the bush.

What to do to get rid of redness

To get rid of red spots on the surface of the leaves, you must use the following means:

"Inta-Vir". The tool is used if spotting has appeared due to pests. As part of "Inta-Vira" there are components that help to destroy pests in 2-3 sprayings. You can use the drug no more than twice a week.
Fitoverm. A universal drug used to treat fungal diseases and eliminate insects. Shrubs are sprayed with Fitoverm three times a month.
"Actara". To get rid of insect pests, it is enough to treat the plant with Aktara once.

How to prevent the problem

So that redness never appears on the leaves, you need to familiarize yourself with how to prevent this problem. Raspberry bushes get sick less often if their roots are protected from mechanical damage. Also, to prevent the development of diseases, it is necessary to regularly feed the bushes with organic matter and mineral fertilizers. Top dressing is added 4-5 times per season.

In addition, the following preventive measures must be observed:

regular spraying of raspberries with fungicides;
transplanting bushes to a new place every 5-7 years;
periodically prune to remove weakened or diseased shoots.

Control measures

Pests must be fought with the help of biological preparations - such as Fitoverm or Akarin. Many chemicals can destroy not only pests, but also other insects that are useful in the biological chain, such as earthworms. Finally, biological preparations contain virtually no toxins. The active components of the preparations are absorbed within about 3 hours, and then for another 3 weeks they steadfastly hold the defense and guard the health of the raspberry bush.

It is necessary to fight against fungal diseases with special preparations. One of the best is the Zircon tool. Purple stem spot is a fungal disease in which the leaves turn red and dry. In this case, it is necessary to select dry leaves affected by the fungus and throw them away from the growth site of raspberry bushes, because spores can move several meters. The preparation "Zircon" must be treated with a bush immediately after the harvest is harvested. This must be done in early spring, as well as spraying young buds in June-July. If everything is done correctly, then you can completely improve the culture.

Finally, there is only one way to deal with the lack of phosphorus - the application of mineral fertilizers with a high content of this mineral. It is better to do it in a diluted form. In general, the lack of phosphorus is typical for poor forest lands, and therefore experienced gardener will always try to prevent the situation than to deal with the consequences.

Why there is a lack of batteries

The lack of nutrients on a raspberry plantation is not always an indicator of neglect. The cause of problems is often weather conditions.

So, for example, excessive precipitation that falls periodically in early or mid-summer, washing away nutrients from the upper layers of the soil, makes them inaccessible to the root system of the berry, and then the raspberry begins to suffer from a lack of nitrogen and potassium.

No less familiar to gardeners is the opposite situation - a long absence of rain. During such periods, it is very important to control the soil moisture under the raspberry with the help of irrigation. If this is not possible, the lack of moisture prevents the nutrients from entering the plant's body, and as a result, raspberries also begin to suffer.

Moisture stagnation in the root zone is also very dangerous. Leading to poor aeration, it can cause the death of both individual raspberry bushes and raspberries as a whole.

Unfavorable wintering also affects plants ...

Let's figure out the reason for what may be certain deviations from the norm in the development of raspberries.

Prevention

Raspberry processing in spring

As soon as the snow melts and the earth begins to warm up, clean up the area where the raspberries grow: cut off the frostbitten tops of the shoots, remove the stems that are broken or different in color, as well as those that grow inside the bush. Rake last year's foliage and burn it, and apply nitrogen fertilizers to the soil on the site and embed them in the ground. After that, tie the raspberry to the trellis and inspect it again for trimming - you might have missed something.

Treatment of raspberries from diseases

It is best to spray raspberries in the spring with nitrafen or Bordeaux liquid as a preventive measure, and you need to process not only the bushes, but also the soil under them. The first spraying should be carried out before the buds begin to bloom. Whether it will be necessary to repeat the treatment in the spring and in the summer depends on what ailments you noticed in raspberries last year. However, after harvesting, it is necessary to carry out the last treatment of raspberries and soil under the bushes this year with nitrafen or Bordeaux liquid in order to destroy pathogens that could appear on raspberries during the summer months.

Processing raspberries from pests

In early spring, before the buds open, treat the raspberries with karbofos or actellik. If you carry out such processing twice a year, cut off unnecessary stems in time and observe the agrotechnical conditions for growing raspberries, then you will not have to complain about either the health of the plant or the fruit harvest. If during the last growing season you noticed some pests on raspberries, then fight them using our information - treat raspberries with insecticides in accordance with the type of pest and as many times as necessary to get rid of it. The last insecticide treatment of the season should be carried out after harvesting.

Processing raspberries in autumn

Raspberry dressing

How to feed raspberries

You need to start fertilizing raspberries even when planting, planting a large amount of manure and mineral fertilizers into the soil for digging. After that, the need for top dressing arises only after two seasons, that is, in the third spring. In the spring, raspberries need nitrogen fertilizers, which must be applied annually over snow at the rate of 8 g of urea or 12 g of ammonium nitrate per square meter.

In autumn, 100 g of ash (as potassium-phosphorus fertilizers) and 6 kg of humus or manure per unit area must be applied to the soil - autumn top dressing is applied once every two years and only if you did not use manure or humus as mulch. The exception is raspberries located on sandy loam - such soil requires annual fertilization. Loamy soils need to be fertilized every two years, but the dosage is increased by a quarter. Manure can be successfully replaced with compost by adding ash and mineral fertilizers to it.

Raspberry fight

How to deal with raspberries

All varieties of raspberries give basal shoots - some less, others more. This growth is spreading over the raspberries, and if you gape, then it will even be where it should not be. The easiest way is to cut 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 the penetration of raspberry shoots into it, the raspberries are fenced with pieces of slate dug into the ground to a depth of 35-40 cm.

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

The condition of berry crops is of great importance for a real gardener. Leaves, roots, stem - everything should be in perfect condition, because only in this case you can get healthy, large berries in sufficient quantities, as well as healthy offspring of seedlings, if necessary. Raspberries are one of the most beloved crops, and today almost any owner of a suburban area has it. The fact is that caring for raspberries throughout the fruiting season is very simple, which means that even the busiest gardeners will be able to enjoy the delicious and sweet berries of this crop by the end of summer. Reddening raspberry leaves can appear in several cases, and it is better to familiarize yourself with each in more detail.

Causes of reddening of raspberry leaves

The most common include the following:

Phosphorus deficiency. Phosphorus is one of the most necessary elements, without which not only the growth of shoots, but also the buds, which in turn are sources of berry formation, are disrupted. In this case, a change in the color of the leaves can be observed, which first turn red, and then acquire a purple hue.
Fungal diseases. Often, red raspberry leaves are the result of the activity of fungi that can settle on the stem. For example, a raspberry bush infected with anthracnose fungus can first surprise the gardener with red and then blackening leaves. It is necessary to carefully examine the entire shoot, not excluding the root zone, in order to identify the presence of the pathogen. If there are other defects, such as cracks and spots on the stem and leaves, then we can safely state the presence of a fungus on raspberries.
Pests. Most often, they settle directly on the stem, which causes it to swell. Their vigorous activity also worsens the state of the culture, and reddening leaves are one of the signs that can indicate pests that have settled on raspberries.

Control measures

Finally, there is only one way to deal with the lack of phosphorus - the application of mineral fertilizers with a high content of this mineral. It is better to do it in a diluted form. In general, a lack of phosphorus is typical for poor forest lands, and therefore an experienced gardener will always try to prevent the situation, which will deal with the consequences.

A change in the color of the foliage usually indicates that the culture is experiencing some kind of discomfort. Although raspberries are not among the whimsical plants, timely help is also needed for her. Otherwise, neither the plant nor the crop can be saved.

Why

The reasons for the appearance of light green foliage on raspberry shoots are usually divided into non-hazardous and dangerous:

Non-dangerous reasons for the appearance of light green leaves in raspberries:

lack of light

The main function of the leaf is photosynthesis, in which plant cells receive the substances necessary for growth and development. This process requires the sun. If the leaves become lighter in the lower, most dense and shaded parts of the plant, the reason for this is the lack of sunlight.

Aging and natural death

Light green leaves gradually turn yellow, shrink and die. This is a common process when it comes to lower, old leaves. Usually, natural dying off begins in the second half of summer.

Nutrient deficiency

Raspberries are demanding on organic matter. If it is not enough, this is expressed in a change in the color of the leaves from saturated green to light, turning into yellow. Usually, the upper, growing leaves suffer from nutritional deficiencies. The lower ones retain their original color.

No moisture

Raspberries love water, and therefore during the drought period they need regular watering. This is especially true of the period of flowering, setting and development of berries. In total, at least 8 plentiful waterings are made per season. During watering, it is necessary to soak the area where the roots of the plant are located, so a lot of water is required, at least 1 bucket for each bush.

Excess moisture

Excess moisture, as well as its lack, has a detrimental effect on raspberry bushes. In the case of prolonged stagnation of water in the root zone, chlorosis of all green parts of raspberries is observed. At the same time, the plant begins to lose color, the berries form much less, they become small, watery, with a low sugar content.

Dangerous causes of light green leaves in raspberries:

Chlorosis

This disease progresses in leaves in which the synthesis of chlorophyll, a coloring pigment, is disrupted. Outside, there is a brightening of the foliage, with further yellowing. At the same time, the veins retain their color. After complete yellowing, the leaves turn brown and die. The process usually affects the upper shoots of raspberries.

A spring or summer change in the color of raspberry foliage to light green indicates precisely the presence of this disease.

Chlorosis is infectious and non-infectious. The latter is often caused by a lack of certain minerals in the soil, such as iron, manganese, zinc, sulfur or magnesium. It also happens that minerals in the soil are contained in a form inaccessible to plants. This also provokes the development of the disease.

Non-infectious chlorosis also appears on plants suffering from severe soil acidification. It is known that raspberries are sensitive to the level of acidity, and therefore deacidification measures should be carried out regularly.

Infectious chlorosis of raspberry leaves is caused by viruses or fungi, which are carried by pests, primarily aphids and mites. In addition, the disease can be brought to a site with poor-quality planting material.

If the foliage turns light green due to infectious chlorosis, such raspberry bushes are best removed and burned outside the site. Treating the site with modern fungicides will help prevent new foci of the disease.

root cancer

In some cases, the cause of light green leaves in raspberries may be root cancer. The presence of this disease can only be judged after digging up an infected bush. Its rhizomes acquire a characteristic goiter. Because of this, they cease to cope with their main task - the delivery of nutrients. Raspberries first change the color of the leaves, and then rapidly die.

Since bacteria are the causative agent of the disease, the affected bushes are not treated, but destroyed in order to avoid further spread of the disease.

What to do

The lack of light is eliminated by thinning the plant by spring or autumn pruning. If this is not enough, the raspberries will have to be transplanted to a more sunny area.

Old foliage should be cut off so that the plant stops wasting energy on it. In the presence of a large number of old leaves, it is better to rejuvenate and feed the planting.

The lack of organic matter is solved by applying chicken manure or any green fertilizer. Mulching with rotted manure with mandatory abundant watering will also help. It will also protect the crop from unwanted evaporation of moisture during the drought period.

Non-infectious chlorosis is treated by introducing minerals, the deficiency of which is experienced by raspberries. If the disease is provoked by severe acidification of the soil, lime will help to solve the problem, dolomite flour or wood ash. The lack of a particular substance can be judged by the color of the foliage. If the leaves become light green - there is a lack of iron, if the leaves are yellow and their size has decreased - there is a lack of nitrogen on the face, if the lightening of the leaf is visible between the veins at the base of the shoot, then the raspberry lacks manganese.

Iron deficiency is treated with iron chelate fertilizer (spraying on the leaf) or its homemade version.

Recipe folk remedy with a lack of iron in raspberries:

Ingredients:

boiled water, 3 liters;
citric acid, 1 tablespoon;
iron sulfate, 1 teaspoon.

Preparation: dissolve in 3 l. water citric acid and iron vitriol, spray raspberries with the resulting product in the evening, calm time at the rate of 1 liter. for 5 m2 of raspberries. The solution should be applied within 1-2 hours after preparation, it is not subject to storage. Do not forget about the "old-fashioned" way of enriching the soil with iron - by burying cans and old rusty nails in the soil next to raspberry bushes.

With a lack of manganese, raspberries are sprayed with a 2% solution of manganese chelate.

Infectious chlorosis is treated by removing infected plants and further treating the area with fungicides.

As a preventive measure and for the control of pests, which are the main carriers of infectious chlorosis, Inta-Vir can be used. One tablet is diluted in 10 liters. water, the resulting solution is processed raspberries on the sheet at the rate of 1.5 liters. funds per 10 m2.

To prevent the spread of infectious chlorosis throughout the raspberries, treat the pruner, knife and other cutting gardening Tools 1% manganese solution when moving from infected to uninfected areas.

Root cancer is easier to prevent than to treat. Therefore, you should water raspberries in a timely manner, fertilize, observe crop rotation and buy raspberry seedlings from conscientious sellers. As a rule, gardeners bring the cancer bacterium to the site with seed.

Light green leaves in raspberries may be evidence of a serious disease or be the result of agricultural errors. Such a plant needs supervision, separate care, in extreme cases - removal from the site.

When growing raspberries suburban area have to face various difficulties. The most important misfortune for a shrub is infection with a particular disease. The plant begins to wither, the leaves fall off and the quality of the berries deteriorates. In the future, the bush can completely die and infect neighboring plants.

Raspberry diseases are divided into two types: infectious and non-infectious. TO infectious diseases include those varieties that spread with the help of different bacteria or fungal spores. They normally respond to treatment at the initial stage, and in further development disease reduces the chances of recovery at times, in the advanced stage it is already impossible to cure raspberries, so the bush is uprooted from the ground - there will be no more benefit from it. Non-communicable diseases are caused by a lack of vitamins in the soil, or by improper care or planting. Difficulties in treating a noncommunicable disease arise when a specific cause is identified. Sometimes, in order to recognize the cause of raspberry wilting, it takes not a single week, as a result of which the shrub may already lose all its strength to recover, so you need to act immediately.

Fungal infections

When a shrub is infected, the fungus quickly penetrates through the cuttings, stem, cracks immediately into the plant tissue. Insects carry fungal infections, but they can prevail in the soil when growing a previously diseased plant.

Important! Most fungal infections begin to affect raspberries in the spring - in April or May.

Fungal diseases include the following types:

Didimella. Otherwise, the disease is called Purple spotting. The causative agent of the disease is a fungus called Didymella applanata. The fungus spreads very quickly along young one-year-old shoots, the stem, forming heterogeneous spots of a blurry shape. Over time, the spots become brown in color, and pathogens appear in the center in the form of small red blotches. The fungus causes spoilage of berries and death of the stem. A measure to combat the fungus is cutting out infected shoots. It is possible to treat with fungicides of the brand Abiga-Peak, Alirin B, Gamair.

Anthracnose. The disease spreads rapidly due to the progression of the fungus Gloeosporium venetum Speg. On the affected leaves and shoots, small red spots immediately appear, in which the middle is colored gray, and the edging is red. After a few days, the leaves begin to curl into a tube, and then dry out and die. Berries die immediately, infected fruits are unsuitable for food. Rainy weather, frequent watering, high humidity positively affect the reproduction of the fungus. In addition to pruning infected shoots, spraying with a 1% solution is effective as a fight against the disease. blue vitriol. Helps prevent the spread of fungus 3% solution of nitrafen and 4% Bordeaux mixture. All solutions are applied to healthy shoots, diseased bushes are immediately removed.

Septoria. The affected area of the fungus is young shoots and green leaves. The disease manifests itself in early summer. Leaves form round brown spots with black dots in the center. The spot dries up, leaving holes in the leaves, and then the leaf itself dies. An effective remedy for septoria was only pruning a diseased bush. The infection is not treatable, infected shoots will not return to normal. To prevent the transfer of fungal spores to neighboring raspberry branches, they are sprayed with a solution of copper sulfate or cineb.

Verticillium wilt. The disease is spread by a soil fungus that affects most agricultural crops. The fungus can overwinter in the soil, is not afraid of frost. The incubation period can be very long, even if the plant has endured spring and early summer well, the first signs of infection will not appear until July, when the weather becomes hot and dry. Withering is manifested by the appearance of yellow dry spots on the sheets. The leaf dies after a while, and soon the shoot itself dies. The use of fungicides will help prevent the spread of the disease.

Rust. One of the most common raspberry diseases is caused by the fungal spore Phragmidium. The disease proceeds intensively with the formation rusty spots on the leaves and then on the stem. The leaves dry up, begin to curl, and then die. New shoots also die. Only the removal of infected shoots and their further burning can eradicate the disease. To prevent the rest of the raspberry shoots from becoming infected, they are treated with any solution containing copper or zinc.

Gray rot. The disease is manifested by the formation of gray plaque on the leaves. Black tubercles form on the plaque. Then the plaque spreads throughout the raspberries, including the berries. To prevent infection of healthy shoots, fungicides such as Fitosporin-M are used. Spray healthy shrubs at least once a week. Sick shoots are cut and burned.

Viral diseases

Viruses enter raspberries with insects or through contaminated soil. Treatment is difficult, but you can save the bush. Viruses multiply rapidly and spread to healthy shoots. One of the radical and effective measures against viral infections has been and remains the pruning of diseased parts. Viral diseases include:

Mosaic. This disease is common. The main symptom is the appearance of tuberosity on the leaves, the formation of rough spots. All spots are separated by a vein, so the leaf resembles a mosaic. Seedlings instantly wither and lose viability. Mosaic quickly affects the berries, forming inclusions on them. The virus spreads well in conditions of high humidity. The main method of dealing with mosaic is the use of insecticides, since the disease is mainly carried by insects. As such, there is no cure for mosaic, only cutting off the infected part of the raspberry can stop it.

Dwarfism. Raspberry virus becomes infected in August or September. The disease may not manifest itself in any way, since the virus calmly survives the winter, already being in raspberries, and will manifest itself only next summer. The main symptomatology is the thinning of the shoots. Young shoots noticeably slow down in growth intensity, new branches become brittle. Raspberries stop fruiting or bear small, ugly fruits; during flowering, deformation and an irregular, mutated shape of flowers may occur. The disease is difficult to recognize because obvious signs its manifestation does not occur. Nevertheless effective means for treatment, decoctions of yarrow herbs, chamomile are considered, you can spray raspberries with infusion of potato tops.

Vein chlorosis. The main carrier of chlorosis is called aphids. The disease resembles a mosaic, so it is often misidentified. A symptom of infection is the appearance of yellow dry spots on the leaves. A grid appears on the spots. The vein of the leaf changes in color - acquires a yellow color. An effective measure today from the treatment of chlorosis is considered to be pruning of infected shoots.

Healthy shoots continue to be treated with solutions of Bordeaux liquid, insecticides.

Curly. The disease becomes noticeable when the shoots reach the age of two. The shoots are short, and the leaves are characterized by increased wrinkling and stiffness. Leaves may become curled at the edges. The fruit brush becomes ugly in shape, the berries do not grow well. Young root shoots have too thick shoots. Curly progresses for 3-4 years, after which the raspberry bush dies out. The disease is not treatable, as it requires too difficult a diagnosis, the symptoms are mild.

Raspberry non-infectious diseases

Noncommunicable diseases are much more common than viruses and fungi. You can recognize such a disease by observing the bush for some time. The main symptoms of the disease are:

yellowing of sheets;
poor or late fruiting;
poor formation of new shoots;
the formation of brittle and thin new shoots.

Such symptoms arise as a result of gardeners making mistakes when planting, caring for growing raspberries. Raspberries should be planted at a distance of at least 50-60 centimeters from neighboring crops in neutral soil. Raspberry additives are used 3-4 times a season. It is allowed to carry out top dressing with special complex compositions. For abundant fruiting and flowering, potash and phosphate fertilizers are used. For the formation of new healthy shoots and leaves, they are applied to the soil ammonium nitrate. Using the right fertilizers and regular watering will eliminate the above symptoms while preserving the shrub.

Prevention and folk remedies

In order not to have to deal with diseases, follow the following recommendations:

perform regular weeding of raspberries from weeds and shoots;
in autumn, the soil must be dug up;
regularly water the shrub, but do not overdo it with watering;
in a timely manner, at least 2 times a year, old and dried shoots are cut;
in autumn and spring, healthy shoots are irrigated with Bordeaux mixture or copper sulphate.

Carrying out these activities will minimize the risk of infection with viruses and various fungal infections.

Important! Prevention of diseases and pests of raspberries is carried out in the spring.

Folk remedies for the prevention of diseases are still used. Raspberries are often sprayed with infusion of potato tops. To obtain an infusion, 1 kilogram of tops is poured with a bucket of water and kept for a day, then the mixture is filtered and 50 grams of grated laundry soap are added. The mixture effectively repels insects - the main carriers of infection.

A similar effect has a tincture of garlic or onions. 4 heads of onion or garlic are finely chopped and poured with 10 liters of water. Infuse the solution for 3-4 days, and then irrigate the raspberry shoots once a week in the spring. Raspberry reacts well to herbal products such as chamomile, yarrow. They do not harm the shrub, on the contrary, they contribute to lush flowering and abundant fruiting. The standard preparations for processing raspberries in the spring were a solution of potassium permanganate and Bordeaux mixture, as well as dissolved copper sulphate.

All processing must be carried out in a timely manner, even in the first year of growing raspberries. Although there is no need for special care for raspberries, the condition of the leaves and stem is constantly monitored, pay attention to the resulting shoots - they should be healthy in appearance and have a beautiful red-brown color. The color of raspberry leaves is green, the formation of spots or cracks is not allowed. In the event that the first signs of damage to the bush are noticed, the cause is established and they are fought by the methods described above.