Why do raspberry leaves turn red, what to do

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

Causes of red raspberry leaves

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

Phosphorus deficiency

Phosphorus is considered the main nutritional component needed for the development of raspberry bushes. 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.

Phosphorus deficiency is also indicated by the fact that seedlings' flowers and buds fall off.

The leaf blades are covered with dark spots with a red tint. Gradually, all affected foliage becomes deformed and begins to dry out. Only phosphorus-containing fertilizer mixtures can save plants.

Fungal diseases

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

Anthracnose. A common pathology that affects not only raspberries, but also other garden crops. Signs of the disease appear on foliage, berries, buds and stems. To promptly identify anthracnose, it is necessary to inspect the leaves. Small reddish dots appear on them, the size of which gradually increases.
Septoria. A disease that most often appears on raspberry bushes. At first, the lower leaves become covered with red spots, but then the bush begins to dry out.
Verticillium. This is a dangerous disease, due to which the yield is reduced by 2-3 times. Symptoms of verticillium include drying of leaves and cracking of stems.

Insect pests

The reasons for the development of red spot include pest attacks on seedlings. There are several insects that often appear on raspberry bushes:

Gall midge. This is a small yellowish mosquito that damages the foliage and stems of garden 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 out.
Aphid. The most common pest that appears on all garden and garden crops. First, aphids damage inflorescences and young shoots. However, gradually the number of pests increases throughout the bush.

Fever and red spots on the legs

As a rule, infectious diseases are the main reason for the appearance of symptoms such as fever and red spots on the legs. In this case, the pathological condition does not necessarily make itself felt immediately; it can occur 2-4 days after the onset of the disease.

Let's consider the main pathologies, which are characterized by fever and rashes on the body:

Rubella - the first symptom of this disease is a rash. It can appear not only on the legs, but also on other parts of the body. Against this background, the temperature rises and general health worsens.

Measles - at first, the patient suffers from high fever, cough, stuffy nose and increased tearing. Very often, such symptoms are mistakenly perceived as a flu infection. But on day 2-3 red rashes appear. Moreover, with their appearance, the temperature begins to decrease.
Chickenpox - in most cases, the rash does not have a specific localization. Changes can be seen not only on the legs, but also on the tongue. A couple of hours after its appearance, the rash increases in size and fills with fluid. As the infection is eliminated, the blisters dry up and the temperature returns to normal.
Scarlet fever - in addition to fever and rash, severe itching appears. The spots can spread throughout the body, leaving a clear area above the upper lip and in the chin area - the so-called scarlet fever triangle
Roseola - usually occurs in newborns. The baby's temperature rises sharply, which decreases within 2-3 days. Instead, red dots appear on the limbs.
Allergy – elevated temperature and changes in the skin are associated with the penetration of an allergen into the body. Against this background, additional pathological symptoms may occur, for example, cough or runny nose.

In addition to the above reasons, painful symptoms may be associated with poor hygiene, diseases of the circulatory system or parasitic infestations.

What to do to get rid of redness

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

"Inta-Vir". The product is used if spotting is caused by pests. Inta-Vir contains components that help 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.
"Aktara". To get rid of insect pests, it is enough to treat the plant with Aktara once.

How to prevent the problem

To ensure that redness never appears on the leaves, you need to learn how to prevent this problem. Raspberry bushes are less likely to get sick if you protect their roots from mechanical damage. Also, to prevent the development of diseases, you need to regularly feed the bushes with organic matter and mineral fertilizers. Fertilizers are added 4-5 times per season.

In addition, the following preventive measures must be observed:

regular spraying of raspberries with fungicides;
replanting bushes to a new location every 5-7 years;
Periodically prune to remove weakened or diseased shoots.

Tips and tricks from experienced gardeners

Experienced gardeners know several tricks that help prevent problems from arising:

Planting mustard next to raspberries repels pests.
Mulching the bush prevents the raspberries from drying out.
Changing the place of growth every 5 years strengthens the immune system.
Be sure to feed the shrub after harvesting.
At the beginning of the season, preventive treatments are done.

Author of the article

Graduated from the Kherson Economics and Law Institute. Since 2008, he has been growing berries and seedlings of raspberries, strawberries and blackberries. Now he is the owner of a small nursery “Zarechye Plant”.

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Control measures

Pests must be controlled with the help of biological preparations - such as Fitoverm or Akarin. Many chemicals can kill not only pests, but also other insects that are beneficial in the biological chain, such as earthworms. Finally, biologics contain virtually no toxins. The active components of the drugs are absorbed within about 3 hours, and then for another 3 weeks they firmly maintain protection and guard the health of the raspberry bush.

Fungal diseases must be combated with special drugs. One of the best is considered to be the “Zircon” product. Purple stem spot is a fungal disease that causes the leaves to turn red and dry out. In this case, it is necessary to select dry leaves affected by the fungus and throw them away from the place where the raspberry bushes grow, because the spores can travel several meters. The bush must be treated with Zircon immediately after the crop is harvested. This must be done in early spring, as well as spraying young buds in June-July. If everything is done correctly, you can completely improve the health of the culture.

Finally, phosphorus deficiency can only be dealt with in one way - by applying mineral fertilizers with a high content of this mineral. It is better to do this 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 rather than deal with the consequences.

Red urine

This condition, called hematuria, occurs when blood enters the urinary tract. A slight reddish tint indicates a small concentration of blood - microhematuria, and a bright red color indicates macrohematuria. This is a sign of serious bleeding in the urinary system.

Hematuria is caused by:

Injuries to the kidneys, ureters, and bladder, in which destruction of blood vessels occurs and blood cells enter the urinary system.
Inflammatory processes in the kidneys, bladder and prostate gland, which also damage small vessels. A reddish color is a common sign of STDs and other infections.
Urolithiasis, accompanied by the passage of a kidney stone. As a result, the ureteral mucosa is injured by the stone, which leads to hematuria. The condition is accompanied by significant pain in the lower back and lower abdomen.
The release of large amounts of urates - uric acid salts. This condition, called uricemia, is a symptom of gout, a disease accompanied by inflammation of the joints.
Malignant tumors that bleed as they decay. With cancerous lesions, the shade varies from bright red to the color of meat slop.
Mass death of red cells - erythrocytes. This situation occurs with infectious diseases, poisoning, snake bites and blood transfusions that are incompatible with the group.

Therefore, such staining is a sign of a serious complication - hemolytic anemia, accompanied by a drop in the level of hemoglobin and red blood cells. As a result, oxygen is not delivered to the tissues, which causes oxygen starvation, which is life-threatening.

Red coloring can be caused by eating large amounts of beets. This condition is called bituria. In itself, it is not dangerous, but it indicates problems with the gastrointestinal tract and a lack of iron in the body. Therefore, with such a symptom, it is advisable to donate blood for anemia and check the gastrointestinal tract.

Why does a battery shortage occur?

A lack of nutrients on a raspberry plantation is not always an indicator of neglect. Problems are often caused by weather conditions.

So, for example, excessive rainfall 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 plant, and then the raspberries begin to suffer from a lack of nitrogen and potassium.

Video: Diseases and pests of raspberries. Brown raspberry leaves.

Video: How to Cure Raspberry Chlorosis? Tips From Garden-zoo garden

The opposite situation is no less familiar to gardeners - a long absence of rain. During such periods, it is very important to control soil moisture under the raspberry tree through irrigation. If this is not possible, the lack of moisture prevents the plants from receiving nutrients and, as a result, the raspberries also begin to suffer.

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

Unfavorable wintering also affects plants...

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

Why do raspberry leaves turn yellow in spring or summer and what to do?

Many gardeners may find yellowing greens on their raspberries. If, for natural reasons, this process begins in the fall, then yellow leaves in spring or summer should be cause for concern.

I will tell you how to correctly identify the cause of such a change and how to eliminate it, based on my experience and a thorough study of all factors.

Thickening the bushes

Raspberry bushes require regular pruning, and if this is not done, then too dense planting will not transmit sunlight well. With a lack of sunlight, the lower leaves begin to lose their natural color or turn yellow.

To eliminate this cause, it is enough to cut off the root shoots and shoots on which fruiting has ended.

To prevent yellowing of leaves, pruning should be done every spring, leaving no more than 7 shoots on one bush.

Insufficient soil moisture

The root system of the shrub is located in the top layer of soil, which quickly dries out. Therefore, in the absence of mulch and watering, raspberry leaves turn yellow and dry, as well as the berries become crushed.

In order to avoid this phenomenon, you must adhere to some rules of care:

Moisten the soil rarely, but generously, pouring at least 15 liters per bush.
Throughout the season, organize watering of the raspberry tree in June and July every 1-1.5 weeks.
In May and August, it is enough to water the bushes once.

Advice! A lack of moisture is primarily indicated by drooping leaves that have lost their elasticity.

Nutrient deficiencies

Often yellow leaves on raspberries indicate a lack of nutrients in the soil. Depending on the symptoms that appear, the missing element is determined:

Slow development of the bush, small leaves with a slight yellowish tint indicate a lack of nitrogen. You can compensate for its deficiency by fertilizing with a solution of manure. To prepare it, you will need to dilute 500 g of cow manure in 10 liters of water, let it brew for 24 hours, add 5 liters per 1 square meter. m.
Yellow leaves and green veins may indicate a lack of iron in the soil. Feeding with 0.8% iron chelate will help compensate for its deficiency.
Early aging of leaves, which begins with their yellowing followed by drying out. This situation can occur due to a lack of magnesium. Fertilizing Kalimag, which is diluted with water and applied at the root, will help correct the situation.
The appearance of a dotted pattern and yellowing of the platinum sheet indicates a lack of zinc. To replenish this substance, a solution of 10 liters of water and 4 g of zinc sulfate is added to the raspberry tree.

The consequences of a lack of microelements can be eliminated by regular fertilizing.

Increased soil acidity

There are situations when gardeners regularly apply fertilizer to the raspberry tree, but the leaves still begin to turn yellow. This situation can occur when the soil is overly acidic. The ideal pH level for this crop is 5.9-6.1.

The higher this indicator, the less minerals penetrate through the root system, and the shrub suffers from a deficiency.

The following substances will help reduce acidity:

Chalk: per 1 sq. m up to 0.5 kg;
Lime (slaked): per 1 sq. m up to 0.4 kg;
Dolomite flour: per 1 sq. m up to 0.5 kg.

Raspberry jaundice

Jaundice in raspberries can also be called infectious chlorosis or mosaic. Like any infectious disease, jaundice quickly spreads throughout the raspberry field. Gardeners can suspect this disease based on the following signs:

Yellowing of leaves, both on young and more mature shoots;
Yellowing of not only leaves, but also stems, sepals and brushes;
The berries also undergo changes: they become small, dry and lose their taste;
Annual shoots by the end of the growing season become weakened and excessively elongated;
On two-year-old shoots, the leaves at the top are most affected.

The first signs can be noticed already when the leaves bloom, and by July the entire raspberry tree begins to turn yellow. By autumn, there is a slight relief of symptoms, some leaves begin to turn green, but this period does not last long, the disease returns with renewed vigor.

At the slightest suspicion of jaundice, it is necessary to remove the affected parts of the bush and burn them. To prevent the occurrence of infectious chlorosis, the following measures are recommended:

Use of healthy seedlings;
Removing bushes immediately after the first symptoms;
Using the shoots of healthy bushes as planting material;
Carrying out correct agrotechnical practices;
Organizing proper care for raspberries.

Prevention

Processing raspberries in spring

As soon as the snow melts and the ground begins to warm up, put things in order in the area where the raspberries grow: cut off the frostbitten tops of the shoots, remove broken or different-colored stems, as well as those growing inside the bush. Rake up last year's leaves and burn them, and apply nitrogen fertilizers to the soil on the site and incorporate them into the soil. After this, tie the raspberries to the trellis and inspect them again for pruning - you might have missed something.

Treatment of raspberries against diseases

It is best to spray raspberries in the spring with nitrafen or Bordeaux mixture as a preventive measure, and you need to treat 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 spring and summer depends on what ailments you noticed in raspberries last year. However, after harvesting, it is necessary to carry out the last treatment of the raspberries and soil under the bushes this year with nitrafen or Bordeaux mixture in order to destroy pathogens that may have appeared on the raspberries during the summer months.

Raspberry pest control

In early spring, before the buds open, treat the raspberries with karbofos or actellik. If you carry out this treatment twice a year, trim unnecessary stems on time and follow the agrotechnical conditions for growing raspberries, then you will not have to complain about the health of the plant or the fruit harvest. If you noticed any pests on raspberries during the last growing season, 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

On the eve of winter, cut out to the very roots the second year stems that will no longer bear fruit, as well as weak and diseased shoots. Shorten the shoots of the first year, which will produce berries next year, to a height that you can reach with pruning shears. After this, remove all the leaves from the stems. They do it like this: put a mitten on your hand and, lightly holding the shoot in your hand, run it along the shoot from bottom to top - just like that, and not the other way around, because otherwise you will damage or tear the buds off the shoot. Leaves that could not be removed in this way are cut from the stem with pruning shears. Rake fallen leaves from the area and burn them along with parasites and pathogenic fungi and viruses. Add fertilizer to the soil, if necessary, and dig up the area along with the rows. Now you can remove the raspberries from the trellis and arrange them for the winter.

What substance colors foliage orange: plant pigments

Orange color, like yellow, is constantly present in the leaves, it is simply overshadowed by chlorophyll. Thus, making the plants green. And the orange color also begins to appear when that same chlorophyll is destroyed.

A pigment called xanthophyll is responsible for the orange color. It also belongs to the class of carotenoids, like carotene. After all, these colors are on a fine line between each other.
I would like to note that it is this pigment that colors carrots. It contains the most of it. Consequently, this pigment is responsible for the orange color of all fruits.
Xanthophylls, like other carotenoids, are essential for the human body. Other living beings too. Because they cannot synthesize it on their own, but can only get it from food.

Leaf color orange

It is no secret that carrots are rich in vitamin A. Accordingly, all these pigments are the main carriers of this vitamin. More precisely, predecessors.
It is also worth noting that they are antioxidants in our body. Every girl knows about this aspect. After all, the appearance of hair, nails and the body as a whole directly depends on this.

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.

How can we explain the change in color of tree leaves in autumn?

How beautiful autumn is here. Despite the rains and cloudy skies, it is beautiful in its own way. It is autumn that the trees are painted in different colors. Of course, it depends on the weather and the nature of the tree

But everyone noticed that even on one sheet there can be several shades or colors

Previously, it was believed that all pigments were constantly present in the foliage. And when the amount of chlorophyll decreases, then other colors become visible. But this option is not entirely true. Specifically refers to anthocyanins.
This pigment begins to appear in leaves only after chlorophyll levels begin to decline.
Let's look at this process in more detail. In autumn, the sun is no longer as warm, which means there is less chlorophyll. Since it is he who is responsible for the nutrients in plants, their quantity is also reduced. This is how the leaves begin to prepare for the cold weather.
This process is very subtle and thoughtful. All those beneficial substances that the plant has accumulated over the summer slowly move into the branches and roots. There they will remain throughout the cold season. And in the spring they will use this supply so that new green leaves appear.

Leaf color in autumn

But the color of leaves, in addition to natural processes, is also influenced by the weather. Typically, in sunny weather, anthocyanin is more dominant. If autumn is cloudy and rainy, then there will be more yellow color in the trees.
But that's not all. The color of the leaves also depends on the breed of the plant itself. Everyone has noticed that maple often has reddish leaves, but linden and birch always have a golden color.
Just before winter, when all the coloring pigments are completely destroyed, the leaves turn brown. There are no longer any nutrients left in them, the leaves dry out and fall off. At this stage, the cell walls of the leaves become visible.