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The leaves of the blackcurrant are brightening. Currant pale leaves. Pests - as one of the causes of yellowing leaves

When in the middle of summer, among the general growth and ripening of fruits, the leaves on the currant turn yellow, it is worth sounding the alarm. If the problem is not solved quickly, you can be left without a crop. Inspection fruit crop will help to correctly “diagnose” and carry out recovery. Timely adoption of measures will allow the shrub to quickly recover and generously endow the owners with ripe berries.

Yellowed leaves on blackcurrant

Causes of leaf color change

What should a gardener look for? On black and red currants, leaf plates may turn yellow in the following cases:

• The appearance of pests;
• Disease infestations.
• Violations of cultivation technology;

The cause of the disease is identified by examining the bush and consistently eliminating signs of damage.

Pests

First of all, you should pay attention to the presence of pests. The presence of insects and their larvae can be the main reason that currant leaves turn yellow.

Diseases

In the absence of insect pests, various diseases can cause the appearance of yellow leaves in currants.

• Sferoteka. Fungal infection of foliage, branches and berries. Formed white coating web-like. As the lesion increases, it gradually darkens. The affected areas turn yellow, dry and curl. Berries fall off. The disease "prefers" black currants, although it sometimes develops on red varieties. Very quickly becomes infected from a number of growing gooseberries. Severe neglect of the disease is indicated by visible black specks. In this case, the crop cannot be eaten. All affected branches are cut and burned in the fall.
• Anthracnose. The yellowing of the leaf comes from a fungal disease that is rapidly spreading over the entire surface of the plates. It begins with the appearance of brown spots, then the affected foci turn yellow, the leaf plates twist and fall off. In red currant, the berries suffer additionally.
• Spotting. A fungal disease, the source of which is the plant residues of currants that have not been harvested since last year. Wind-borne spores infect the leaves of the fruit crop.
• Rust. It is brought by cereal weeds. Red swellings at the bottom of the leaf, leading to its yellowing and death.
• Terry. Viruses carried by spider mites. The main signs: purple color and terry coating of inflorescences, elongated yellowing leaves, poor development or fall of berries.

Diseases can occur together or separately, so you need to look carefully and choose, if possible, universal ways fight against illness folk remedies or chemicals universal spectrum of activity.

Other causes of yellowing and how to eliminate them

The reasons why currant leaves turn yellow may be errors in cultivation practices.

Cause	How to eliminate?
Drought. Additionally, small roots die.	Active watering, loosening the soil under the bush. 2 buckets of water per landing.
Increased humidity. Rotting of small roots.	Loosening, normalization of watering.
What if the soil is sandy or hard, not too fertile?	Top dressing. In the autumn season - rotted manure, fertilizers with potassium and phosphorus. In the spring - a liter of ash for each planting.
Excess peat, potash or phosphate fertilizers in the soil.	Reasonable top dressing, especially on young plants.
Close proximity to other fruit plants.	Leave between plantings 1 m of land or more.
Underdeveloped roots.	Make a shaping cut. Leave 4-6 strong shoots. This will allow the plant to strengthen the root system.
Early planting of seedlings in spring. Freeze back and temperatures below 18°C ​​are not in the best way affect survival.	It is better to plant in the fall so that the seedlings can take root.
Landing on a shady, swampy, windy area.	Cultivation in the light, protected from drafts.
Age over 15 years.	Periodically change old plants to young ones.

If there is enough water, but the leaves on the currant continue to turn yellow, there are not enough nutrients, especially nitrogen. Major annual compulsory work: pruning, fertilizing, watering.

IMPORTANT!!! The annual amount of fertilizer to support one blackcurrant bush: 40 g of ammonium nitrate and superphosphate, 30 g of potassium chloride. IN acidic soils after 6 years, lime is added around the plant.

What to do with yellowed currants

Having figured out why currant leaves turn yellow, you need to start improving the fruit crop. You can fight pests and diseases with the help of folk remedies and industrial preparations.

Folk remedies

• Infusion of garlic, dandelion (from roots and leaves), tobacco or onion peel- With laundry soap(1 piece per bucket of water). If you do spraying on currants.
• solution of tomato leaves. Watered so that the plant does not turn yellow.
• Dry mustard. Sprinkling.

In order to prevent - after flowering, before the formation of the berry mass, the plants are treated with an infusion of onion peel.

Disease treatment:

• For 10 liters of water a quarter wood ash. Spraying with an extract is carried out in the spring. Dry dressing is acceptable.
• A liter of fermented cow dung slurry per ten-liter bucket of water.
• From powdery mildew and other fungal diseases: a third of the volume of the mullein is poured with three liters of water, after 3 days it is diluted to a bucket. Treatment in early spring, after color reset and at the end of summer.
• Spraying with whey solution: 1 liter of whey in 9 liters of water.

After picking the berries, they are treated with the same means for prevention.

Features of the destruction of some pests:

• Spider mite - on early stages appearance, it is enough to confine yourself to spraying or rubbing with fresh water.
• gall aphid- start the fight as soon as you notice that small tubercles appear on the currant leaves.

IMPORTANT!!! Since the currant glass is not afraid of chemical treatment, it is extremely important as a preventive measure to loosen the soil around the circumference of the bush in spring and in the first days of summer. Be sure to burn all plant residues in the fall.

Use of drugs

In extreme cases, when folk remedies are powerless to overcome the disease, you can use chemicals. Treatment with insecticides, acaricides and other means is recommended at the end of the flowering period.

Name of the drug	Sphere of influence	Period of use
Decis, Kinmiks	Yellowing prevention.	From the moment of bud swelling to flowering.
Bordeaux liquid, Colloidal sulfur, Topaz, Fundazol, Hom.	For any illness.	Once a decade. Drugs can be alternated. From anthracnose - in early spring or 14 days after picking berries, on bushes that were sick last season.
Agravertin, Fitoverm	Prevention.	At the end of flowering.
Acaricides, insectoacaricides, including Forbid 4F and Envidor.	From aphids and spider mite.	Before color set, after harvest. Each sheet must be processed on both sides to avoid yellowing.
blue vitriol	From powdery mildew and other fungal diseases.	As needed.
Anometrin - N or Rovikurt. Karbos.	From kidney moth.	Strictly before flowering.

The general scheme for processing currants:

• The first treatment is done before bud break.
• Seating of thickened plantings.
• Processing throughout the growing season.
• Autumn burning of plant residues.
• In dry autumn - abundant watering and deep, neat loosening.
• Regulating and shaping pruning.
• Preventive treatment with insecticides.

are finishing autumn processing digging the earth between the bushes. Be careful not to touch the root system. This leads to the death of pests that have settled there for wintering.

Maintain the requirements of agricultural technology! Spend on time preventive actions for the control of pests and diseases. Knowing why currant leaves turn yellow, try to prevent this from the first days of crop growth.

Growing up on own site currant bushes, sometimes the gardener is faced with such a problem when the foliage brightens or even fades. There can be many reasons why currant leaves are light green. But how to overcome such a phenomenon, and how to identify a provocateur in a timely manner and consider below.

Why is the foliage brightening

In the vast majority, currant leaves fade when the plant was planted in an unsuitable area. Solving the problem will not be difficult.

But it happens that the chosen place for planting is ideal for this crop, but the foliage still brightens and fades. In this case, the problem may be due to the following factors:

• lack of fertilizers in the soil;
• the appearance of leaf chlorosis;
• Not proper care behind the plant.

In the vast majority, all of the above causes can be easily eliminated if steps are taken in a timely manner.

At the same time, it is important to understand that light currant leaves are the first signal to the gardener about the need to take immediate action, otherwise in the future you will not only not harvest, but may even lose the currant bush.

How to deal with the problem

If the leaves on the currant turn white, you need to carefully examine the area where this crop was planted. So, the first signs that the land is not suitable for:

• place: planted bushes are in the shade;
• shrubs planted in soil unsuitable for cultivation;
• when planting several bushes, the required distance was not maintained, which led to a strong thickening of the front garden.

There are several ways to solve the problem that has arisen. First, if it is not possible, then the area should be thinned out so that the plant can receive more light.

In the event that the soil is poor, then it can be fertilized with ammonium nitrate, which should be applied in early July. And next year, be sure to add organic matter and potash fertilizers to the soil.

In addition, do not forget, despite the fact that currants do not like fertilizers containing chlorine, they must be introduced into the soil. As a rule, this type of top dressing is applied to autumn period.

And the last thing to consider is the location of the root system black currant. The currant root spreads up to two meters in diameter, therefore, when fertilizing, be sure to take this moment into account and evenly distribute fertilizers.

And, of course, do not forget about watering. The fact is that it is not recommended to apply fertilizers under a bush without preliminary moistening, otherwise the currants can get burned. This often leads to the death of culture in the future.

Another problem that often causes juicy green leaves to fade is leaf chlorosis. If infectious chlorosis attacks, the foliage will first turn greenish pale in color. Then reddish streaks appear on the currant.

And the final stage of the action of this dangerous defect is the twisting and drying of the foliage. To overcome such a disease, you can only uproot the diseased culture and treat the area where the affected currant grew.

Well, if chlorosis of non-infectious origin appeared on the shrub, it can be identified by the following signs: first, the leaves become pale green. And then they turn white. What to do in this case?

First of all, you should properly feed the berry, since this is the first sign of a lack of nutritional components in black currants.

To do this, use the drug Topaz, or iron chelate. Then, it is necessary to loosen the soil well and add a mixture consisting of sand, rotted humus and ash, mixed in equal parts. Next, thin out the bush so that the rays sunlight illuminated all the sprigs of blackcurrant.

By performing such simple manipulations, your currants will be generously covered with a green mass of brightly saturated color.

Prevention

So that the leaves of blackcurrant do not change their color, you need to regularly feed garden beauty. For this, it is not at all necessary to purchase special preparations. Almost everything that this culture needs is in the country.

The main thing is to perform such a simple manipulation in a timely manner. And, of course, do not forget that it is very important to choose the right place for planting blackcurrants, because it is often because of the wrong site that the foliage of this crop turns white.

If you notice that blackcurrant leaves are turning yellow, don't be too cool about it. A change in the color of the leaves always indicates the presence of pests, or in this way the plant signals a serious problem.

Pests

Often blackcurrant is affected gall aphid. This pest is a pale yellow insect that produces about 7 generations per season. Aphids can be found on reverse side leaf, where they live in large groups.

The yellowing of the leaves occurs due to the fact that insects pierce the smallest vessels of the leaf with their trunks and suck out of them nutrients. At the beginning of damage, the leaf surface becomes weak, lifeless, yellowish or reddish swellings appear on it, which gradually turn into dark color. After that, the leaves turn yellow and fall off prematurely. The plant stops its growth, new shoots practically do not grow. The berries of infected blackcurrants develop very slowly or do not form at all. It is necessary to start the fight against this pest from the moment it is discovered, since the gall aphid reproduces very quickly.

The difficulty lies in the fact that during the period of active fruiting, the plant cannot be treated with harmful chemical solutions. You can fight pests by removing infected leaves and cutting off weak shoots.

At the end of the season, fertilizing the infected leaf should be carried out., cutting off damaged branches and treating with a special solution from aphids. Processing must be done very carefully, paying attention to the underside and top side of the leaves. In autumn, it is necessary to perform secondary processing of the bush, since aphids can fly away from currants in the middle of summer, returning in the autumn and laying eggs for the new season. Therefore, it is important not to forget about this feature of pests. For prevention purposes, it is also necessary to treat aphids in early summer before the bud break period. This will help kill the gall aphid eggs that have survived the winter.

Another enemy of culture - currant glass jar. Caterpillars gnaw on young shoots, feeding on the juice of the plant, which weakens the currant and provokes yellowing of the leaves and deterioration. appearance shrub. This larva, which eventually turns into a butterfly, looks like a wasp and is very resistant to chemicals. The main method of dealing with it is proper prevention.

To protect currants from infection with a glass case, it is necessary to loosen regularly in May and June. It is also important to monitor the quality and purity planting material. Suddenly dried branches must be cut to the very base, after which they must be burned.

External factors

Not only pests can cause yellow leaves, discoloration can also contribute soil dryness. Therefore, in dry and hot weather, it is necessary to regularly water the shrubs and apply complex fertilizers.

However excess moisture can also adversely affect the plant, as under the influence of a large amount of moisture from the soil are washed out useful material which weakens the plant and causes leaf discoloration. Therefore, in caring for blackcurrants, it is important to adhere to the principle of moderation. At the same time, a small excess of moisture will not harm the shrub, since the currant is a fairly moisture-loving crop.

Blackcurrant bushes should be placed at least a meter away from other plants, since the culture needs a sufficient amount of light and free space. Otherwise, the leaves of the shrub may crumble and turn yellow.

In order for the currant to form green healthy leaves, and the fruits to turn out juicy and tasty, you must select in advance right place for landing. And in the process of growing, it is important to conduct regular preventive examinations, which will help to identify pests and diseases in time.

Healthy and well-groomed currants are rarely affected by harmful microorganisms and insects, since they have stable immunity. Currant, like others fruit crops becomes weakened and vulnerable to pests and diseases as a result of improper care, excessive or insufficient fertilization, non-compliance with agricultural practices and mechanical damage. In the article we will tell you why the leaves of the currant turn yellow and dry in spring and summer, we will give an analysis of the reasons.

Currants with low immunity in the vast majority of cases become infected with viral or fungal diseases.

Consider the most common causes, causing premature yellowing, drying out and falling of leaves in currants. Consider effective ways pest and fungal disease control, and effective ways protection of currants from non-infectious diseases caused by a violation of the water, light, nutritional regime and adverse weather and soil conditions.

Currant diseases leading to yellowing, drying out and premature leaf fall

Fungal and viral diseases currants affect mainly leaves and petioles. The first signs of infection with pathogenic spores are observed in early spring. In the absence of timely treatment, fungal diseases can destroy the plant in one season. Consider several types of currant diseases that cause yellowing and drying of the leaves in spring and summer:

1. Anthracnose appears as brown dots on the surface of the leaf blade. In the affected areas, it destroys chlorophyll, which leads to discoloration of the leaf blade. Over time, brown dots grow and begin to merge into a single spot. The spots increase in size, which leads to premature drying and leaf fall.

Anthracnose disease is activated during the rainy season and during high humidity air. Disease spores spread harmful insects and transported with water.

Affected red currant leaves fall on initial stage anthracnose infection.

1. columnar rust - This fungal disease, which is spread by insect pests or with a wind stream from such coniferous trees like cedar or weymouth pine. The first symptoms of the disease are formations yellow spots on the outside of the plastic sheet. On the lower part, yellow growths in the form of hairs form.

Columnar rust simultaneously affects the upper and lower parts of the currant leaf.

1. Septoria appears on the leaves of currant in the form of brown spots. As the disease develops, the spots lighten, only the brown edging of the spot remains intact. With a strong lesion, premature fall of currant leaves is observed. Infection occurs by spores that overwinter in fallen leaves.

The vein mosaic on the currant is not treatable. Infected currant bushes must be destroyed.

With a disease of septoria, brown spots appear not only on the leaves, but also on the fruits of the currant. Septoria often develops on the leaves and fruits of blackcurrant.

1. vein mosaic – viral disease is activated after the leaves bloom. Attacks leaf veins. It appears as a bright yellow pattern on currant leaves. Over time, the leaves dry up and fall off.

The sources of vein mosaic disease are in 90% of cases insect pests such as aphids and mites. In 10% of cases, the source is contaminated inoculum.

In the table, we consider chemicals and the optimal time for treating infected currant bushes with fungal diseases with drugs:

Types of fungal diseases	Chemicals	Treatment
Anthracnose	Nitrofen	Before bud break
	Cuprozan	Before flowering
	Colloidal sulfur 1%	1. After flowering. 2. After harvest
columnar rust	Bordeaux liquid 1%	1. During the period of leaf blooming. 2. During the budding period. 3. After flowering.
Septoria	Nitrofen or Hom	Before bud break
	Bordeaux liquid 1%	1. Before flowering. 2. After flowering 3. After harvest
vein mosaic	Not amenable to treatment. Destruction of the infected currant bush is required.

Tip #1 When treating affected currant bushes with fungal diseases, Bordeaux liquid can be replaced with a solution of copper oxychloride. Copper chloride has a strong bactericidal effect. To avoid the accumulation of toxic substances in currant berries, processing should be stopped 20-25 days before harvest.

Currant pests causing premature yellowing and leaf fall

Premature yellowing and falling of the leaves of the currant occurs as a result of the attack of insect pests. These pests include:

• gall aphid;
• currant glass;
• spider mite.

gall aphid very voracious and prolific insect. Inhabits currants in spring. It feeds on plant sap until mid-summer. Continuous absorption of juice leads to the exhaustion of the plant. In places of damage, growths appear.

Gall aphid infects white and red currants. In rare cases, it is found on blackcurrant.

currant glass jar looks like a wasp. Inhabit currants after flowering. Forms oviposition under the bark of shoots, from which voracious caterpillars appear. Caterpillars eat away the core of the shoots. caterpillars eating soft tissues shoots, form passages up to 60 cm deep, in which they remain to winter until spring. In the spring, caterpillars gnaw their way out to the surface of the shoot, pupate and turn into butterflies.

The currant glass case affects all types and varieties of currants. The glass case damages up to 50% of blackcurrant shoots and up to 30% of red and white currants.

Tip #2 You can scare away the currant glass folk way. During the period of mass summer, treat currant bushes with strong infusions from plants such as wormwood and tansy. The pungent smell of herbal infusions disorientates and repels glass-case butterflies.

spider mite hides in the scales of the kidneys, so it is quite difficult to see the pest with your own eyes. The main sign that a spider mite has wound up on a currant is swollen and deformed kidneys. Inside each swollen currant bud, several generations of mites can live simultaneously. Leave the monastery as soon as it becomes crowded. In search of a new home, they move to healthy fruit-bearing shoots.

Ticks move to healthy branches during the budding period. This period is considered the most favorable for the treatment of currant bushes with pesticide preparations.

In the table, we consider preparations that will help destroy gall aphids, glass cases and spider mites on currants:

Currant pests	Preparations	Drug consumption	Favorable period for processing
gall aphid	Nitrafen 3%	0.5 l per 1 bush.	5-6 days before bud break and after leaf fall.
Glassware	Nemabakt or Antonem -F	250 ml per bush	At the stage of bud break
spider mite	Oberon, Aktelik, Nitrafen	200 ml per bush	At the budding stage

Yellowing of currant leaves as a result of a violation of mineral nutrition

Yellowing of the leaves of the currant is observed with a deficiency and excess nutrients nutrition. In the table, we consider how the excess and shortage of any nutrient affects the state of the plant:

Batteries	The state of the plant with an excess of nutrients	The state of the plant with a lack of nutrients
	The vegetative mass is intensively growing. The leaves are large, bright green. The leaves are fragile.	The leaf blade is discolored. Green color retain only the veins. Leaves fall prematurely.
	The petioles and the lower part of the leaves acquire a reddish tint.	Small spots of cranium or purple hue. The edges of the leaves curl down. Leaves fall prematurely.
Potassium	Leaves curl down. Affected leaves do not die off, but do not fall off until the end of the growing season.	The edges of the leaves darken, dry out and fall off. Only the core of the sheet remains intact.
Calcium	The growth and development of the plant is suspended. Leaves turn yellow in patches.	The upper part of the leaves acquire a purple hue. The lower part of the leaf becomes discolored and dries out.
Iron	The leaves turn yellow mainly between the veins. The leaves look sluggish.	The leaf blade turns yellow completely. The edges of the leaves dry out and fall off.
Bor		Only the main veins turn yellow on leaf blade. Drying and shedding of the tips of the leaves is observed.
Manganese	Does not affect the condition of leaves and shoots.	Dry gray plaques form on the leaves.

Experienced gardeners recommend feeding currants several times during the season. Nitrogen fertilizers must be applied in early spring. efficient nitrogen fertilizer for currants is urea. Urea is best applied in liquid form. To prepare the solution, 1 tbsp is enough. urea per 10 liters of water. Solution consumption - 10 liters of water per bush.

In summer, currants should be fed with organic fertilizers. It is enough to prepare a solution of mullein in a ratio of 1 to 10. The consumption of the solution is 1 bucket per bush. In autumn, currants are best fed with a nutrient mixture of compost, superphosphate and potassium sulfate. The mixture is prepared at the rate of 5 kg of compost, 3 tablespoons of superphosphate and 2 tablespoons. potassium sulfate.

Common gardener mistakes leading to yellowing of currant leaves

1. Carry out the wrong feeding mineral fertilizers. Deficiency and excess of basic nutrients leads to yellowing of the leaves.
2. Produce rare watering. So with a lack of water, young currant roots die off. The plant ceases to receive useful substances, castings begin to turn yellow and fade. Due to the lack of nutrients, the currant begins to shed its foliage in order to survive.
3. Excess water in trunk circles leads to rotting of small roots. The plant stops receiving nutrients, which leads to yellowing of the leaves and weakening of the plant as a whole.

Frequently Asked Questions for Gardeners

Question number 1. How to detect a currant glass case?

The glass is hard to find. The glasswort lays its eggs under the bark of the shoots. The caterpillars that have appeared live in the core of the shoots for up to two years, feeding on the juice of the plant. In this regard, several currant shoots should be cut, on which there are yellowed leaves. If there are black dots in the core, most likely the currant is affected by a glass case.

Question number 2. What plants are intermediates for gall aphids?

In the second half of summer, the gall aphid inhabits such plants as oregano, chistets, lavender, mint, sage and thyme. When fighting gall aphids on currants, the above plants must be destroyed.

Question number 3. What plants should be planted between the rows of currants to scare away pests?

You can scare away currant pests if you plant marigolds, garlic and calendula nearby.

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These are diseases, as far as I know, that are provoked by pests, or planted in the wrong place

Currant - unpretentious shrub, but often gardeners think about why currant leaves turn yellow? Premature yellowness of the leaves appears more often on red and white currant bushes, but owners of large blackcurrant varieties are also sometimes upset about this.

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Red currant care

- But because it is still green! Caring for red currants in spring I don't know, but I'll tell you a joke. .​ try to feed Inspect bushes regularly throughout the year for fungal diseases and pests. At the first signs, it is necessary to carry out the required processing and treatment. Do not forget to destroy the weeds so that they do not take moisture from the currant bushes. Make annual mulching from a mixture of peat and rotted manure. Pruning, be sure before the buds open. If the currant bush is already old, large, fruitful for many years, then to the question of why the currant leaves turn yellow, the answer is obvious - from time to time. The productive life of this plant is considered to be 16-18 years. But proper care, including regular feeding, shaping and pruning of bush shoots, prolongs the life of currants for another ten years. How to care for red currants in summer Soil poor in nutrients. Blackcurrants need to be fertilized every year with nitrogen, phosphorus Wrong landing. From right choice landing site depends on the development of the bush. Currant prefers fertile, loamy, well-moistened soil. The plant will develop poorly in dry, unprotected from the winds, as well as swampy places. Why currant leaves turn yellow: the main reasons Caring for red currants in autumn These are generally bugs crawling there - This is your blackcurrant Chlorosis, some elements are not absorbed due to problems with the roots, what needs to be found out with the roots, if it is flooded or the primer has risen, then the suction roots may die from dampness, then you can spray ferovit a couple of times according to the instructions, but maybe someone gnaws at the roots (khrushch), if there was no flooding, I don’t know here, maybe some kind of poison to dilute with a bucket and pour under the root - I would have done that, maybe I could have saved the bush. With elementary care, red currants will bear fruit for a long time with tasty and healthy berries! To obtain high and stable yields, it is necessary to annually introduce mineral and organic fertilizers. Therefore, in the fall, we fertilize each bush of red currant with 40 g of potassium chloride and 120 g of superphosphate. For the winter, we must throw the currant bushes with snow to prevent the roots from freezing. Also pay attention to the bushes, if they are planted too often, then shading each other, they will grow poorly and give little yield.

sadyk.ru

WHY THE LEAVES ARE YELLOW ON THE CHEON CURRANT

Alena Makarevich

Loosening the soil near the bush.

*****

Now you know why currant leaves turn yellow. In order for the bush to please you with weighty clusters of its healing berries next year, take care of it this year by adhering to our recommendations for caring for the plant.​

Irina Shabalina

and potassium substances. The standard recommended ratio of organic or mineral substances to support one currant bush is as follows: ammonium nitrate - 40 g, superphosphate - 40 g, potassium chloride - 30 g. After 6-7 years, lime should be added to the soil around the plant if the soil is too acidic. In order to increase productivity and increase the growth of shoots, you should regularly and properly care for the bush.

Cherry

Non-compliance with the temperature terms of landing. Often the question of why currant leaves turn yellow worries those gardeners who practice planting young bushes in early spring. Frosts are still possible in spring low temperature inhibits the growth of currant buds. Optimum temperature for intensive growth and development of the plant is + 18 + 20 ° C. Therefore, young bushes develop better if they are planted in autumn.​

Why do blackcurrant leaves turn yellow?

Natalya Sludnikova

Subjected to some diseases and pest attacks, blackcurrants may lose the quality of their fruits. The leaves of the plant curl, become covered with brown spots, turn yellow and fall off. A massive damage to the leaves of a shrub can lead to a weakened state and even to the death of the plant.

~ Julia ~

I don’t know why yours turn yellow, but mine is not only yellow, but also a lot of dry, crumbled like autumn. And the cursed tick is to blame. I have been fighting him for two years.
- No, red!
Often this symptom occurs in a plant infected with leaf gall aphids. Most often, this pest inhabits bushes of red and white currants, but cases of aphids in black ones are not excluded. Gall aphid - pale yellow small insect, which can give up to 7 generations per season. The aphid feeds in an interesting way: it pierces the vessels of the leaf and sucks out the nutrient healthy juice. After that, yellowish or reddish swellings appear on the leaf, which darken over time, and the leaves themselves turn yellow and fall prematurely. If you do not fight these insects, then they multiply rapidly, populating the entire currant plantation. Berries on a pest-infested plant are significantly smaller, and sometimes do not appear at all. The infected plant is sprayed with a special solution. When blackcurrant leaves turn yellow, this does not always indicate the presence of pests. Sometimes the plant sheds its foliage prematurely due to the dryness of the soil. Therefore, in a hot summer, currants should be watered and fed, and then she will thank the owner with a rich harvest. Also, the place where the currant bush grows needs to be loosened, weeded and fertilized from time to time. All varieties of currants are mostly unpretentious and adapt without any problems to different conditions. It is worth recalling that the soil must be soft in order to root system grew easily and received all the necessary nutrients. It is not necessary to buy mountains of fertilizers, because there should be a sense of proportion in everything. Because with an excessive content of peat, the root system can simply burn out and the bush itself can die. Currant bushes must be planted at a distance of about a meter so that they do not interfere with the development of each other. With a dense planting of currants, the bush grows small and, accordingly, the number and size of berries decreases. Moreover, planting a plant in a darkened area is the cause of premature leaf fall and a meager harvest. Measures to combat pests and diseases In the spring, before bud break, first thin out the bushes, remove and burn all the sick, infected with glass, bud mites and currant bud moth branches. Clear the cottage of fallen leaves. Very effective method fight against all pests and diseases - treatment of bushes with hot (+ 70 ° C) water. During the period of bud swelling and up to flowering, spraying plants with Decis and Kinmiks preparations can be recommended for pest control. And against diseases, use Bordeaux liquid, colloidal sulfur, Topaz, foundationazole, HOM or oxy-HOM. Processing should be carried out regularly - once every 7-10 days. You can apply several drugs in turn. After the flowering of the bushes and before the ripening of the berries, to control pests, the plants are sprayed with an infusion of onion peel, biological preparations Agravertin and Fitoverm. Help to cope with diseases Bordeaux liquid, infusion of mullein (1 l of fermented slurry per 10 l of water), decoction of wood ash (1/4 bucket per 10 l of water). After harvesting, to combat diseases and pests, you can use the same preparations as before flowering bushes. Dosage and methods of application of the means mentioned in the article, read the instructions for them. (Olga Nikolaevna STROGOVA, agronomist, Samara)​
​Following articles:​
Care for long-lived bushes

Yana Kraeva

​Main summer care consists in tying branches and watching the berries so that they do not fall to the ground. As for additional watering, red currants, in general, do not need them, except for several periods.

Olga Dorovskaya

You can make stands for branches, then the shrub will grow straight.

In general, redcurrant is an unpretentious plant, but to increase its yield, it needs constant care, which is based on tillage, watering and weed control. Conventionally, it can be divided into three stages: spring, summer, autumn.​