Why do leaves currant turn yellow and how to deal with it?
Quite often in July, gardeners and gardeners see yellow leaves on their berry bushes. In order for the crop to be large and the plant healthy, it is necessary to clearly know the reasons why the leaf plates of the shrubs began to turn yellow and fall off, and what to do in this situation. The cause of this problem is extremely simple to find out; you just need to carefully examine the culture. This may be the defeat of any disease or the attack of one of the pests.
The reasons
In order to properly deal with the problem, you must first find out what exactly happened to the bush. Every disease or parasitic lesion has its own characteristics, even if they are similar. Therefore, the more carefully the gardener learns the culture, the sooner he will find out what happened to her. Most often, diseases affect cultures in May and June. Various symptoms may indicate a problem the gardener has encountered.
The leaves may turn yellow and fall due to dangerous parasites, various diseases or improper plant care.
Improper care
If you take care of the plant correctly, it will develop well and in the future will give the owner a big harvest. Before the shrub is planted in the soil, you should familiarize yourself with the basic rules and guidelines for care. Only then will it be healthy and durable. Gardeners very often make many mistakes that lead to yellowing and falling off of leaf plates.
- Some inexperienced people plant shrubs in the wrong place. How currant will develop depends directly on whether the plot for planting is correctly chosen. It is necessary to find a fertile, well-hydrated and loamy soil. Categorically it is impossible to plant a plant in a dry or swampy place that is not protected from the wind. It is important to remember that the shrub needs a lot of nutrients, so you should not plant it next to other plants. It is necessary to make so that the distance between them was more than one meter.
- Gardeners who plant berry bushes in March face a problem that can harm a plant - this unsuitable temperature. At this time of the year, sudden frosts may begin, leading to poor growth of the bud buds. The ideal temperature for planting a crop is + 18– + 20 degrees. To currant leaves are not yellow, should be engaged in planting in the fall.
- If the soil does not have any nutrientsThis may affect the health of the leaf plates. Nitrogen, potash and phosphate fertilizers are extremely important for currants, otherwise the culture will not be able to fully develop. Forty grams of ammonium nitrate, the same amount of superphosphate and thirty grams of potassium chloride should be used per bush. When the plant is 6–7 years old, the soil around it should be treated with lime.
- Many face a lack of moisture - This is the most popular and common problem of gardeners. Fortunately, it is quite easily solved. It is important not to forget that the bushes require abundant watering in the summer, because in summer the temperature is extremely high. If you do not constantly moisten the soil, the leaves become yellow, and the berries - small. Some of them dry up without ripening.
- When planting plants should carefully inspect their roots. The root system of shrubs should be well developed (4-6 shoots, well-formed young roots). If the roots are weak, they will not be able to give the shoots the necessary nutrition.
Diseases
Most often, diseases affect those shrubs that do not receive proper care, as their immunity is weakened. But sometimes other plants that are strong and resistant to them can become infected with diseases. There are several common diseases, the symptoms of which are yellowed leaf plates.
- Anthracnose - This is a disease that provokes the fungus. It spreads quite quickly through the leaves, and then yellowish brown spots can be seen on them. Soon the leaf plates begin to curl, and at the end fall off. Red currant loses not only leaves, but also fruits. If the disease is started, the plant may die, so it is extremely important to notice it before it starts to develop.
- Terry - This is a viral disease. Most often, the disease falls on the shrub with the help of a parasite - spider mite. The leaves turn yellow, become more elongated, the flowers turn into purple and terry, the fruits may fall off or do not develop.
- Sphereoteka. The plant is infected with the fungus. Almost all areas are affected: leaf plates, branches, fruits. They can be seen bloom white, which looks like a cobweb. Over time, it darkens, the leaves turn yellow and rapidly fall. Fruits are also showered. The disease can be transmitted to currants from gooseberries growing nearby. If you run it, the infected areas begin to become covered in dots of black.
- Spotting - It is a fungal disease, which in winter is on the leaves and other plant residues. Disputes spread by wind. Leaves become yellow, fall off.
- Rusty currant is infected by grass weeds. The bottom of the leaf plates become swollen, convex (the bulges are red), then turn yellow and crumble.
Do not think that diseases can affect the plant only one by one. Shrub can get sick with two diseases at once.
If the gardener has noticed that the leaves turn yellow and begin to fall off, it means that the culture is accurately infected and it is necessary to use complex treatment (to fight diseases with the help of folk or chemical means that will help get rid of the problem).
Pests
A similar symptom may also indicate that the shrub is attacked by parasites.
- Kidney mite most often attacks black currant. In one bud of a plant there can be more than one thousand individuals of the pest. The parasite has an extremely small size, so it is very difficult to see. The only signs that this pest is on the currant are the incredibly large size of the kidneys and the yellowed leaf plates.
- Aphid - This is a common parasite that spoiled the harvest to many gardeners. The symptoms of the fact that it was the gallic aphid that struck the currant are yellow or red blooms on the leaves. In this case, the person will feel like the leaves have turned yellow or red. Soon they become darker, begin to dry and fall off. The pest uses in the juice of the leaves of the bush, for the season it can be visited for seven generations. Insect can destroy a lot of berry bushes in the garden, as it settles on absolutely any plant.
- Glass cup - This is a butterfly, the larvae of which live in the cores of young branches of the plant and in two years eat the flesh inside. Thus, they can gnaw through the ground. Leafy plates that do not receive the necessary nutrients become yellow and dry. To check whether the bush is attacking the bush, you need to cut one branch and see if there is a dark point on the cut.
- Spider mite is a pest that settles on the back of a leaf, most often on young branches and leaf plates. A gardener can understand that a garden is being attacked by spider mites by the presence of abundant cobwebs. Parasites have a small red body. The leaves infected with insects become pale, yellow and dry, after some time they curl up.
Methods of struggle
When the gardener has found out what exactly is the cause of the yellowed and fallen leaves, he can deal with this problem in order to keep the bush healthy and beautiful.When the weather is dry, the soil dries up due to lack of water. This problem is solved extremely simply. You should water the shrub (two buckets per plant) and be sure to loosen the ground. If, on the contrary, the weather is too wet, you should constantly loosen the soil under the crop and not allow it to be overwetted.
If there is a shortage of substances necessary for the plant (most often it happens if it is in hard and barren soil), the soil should be fertilized in the autumn with the help of humus and phosphorus-potassium additives.
In the spring, you can use an excellent folk remedy that saved a lot of shrubs - ash solution (liter per bush). If there is too much peat or fertilizer in the soil, you should try to stop using top dressing, especially for young shrubs. From any disease, be it viral or fungal, you can get rid of using such folk remedies as:
- To prevent the plant from becoming infected or getting rid of the disease, as well as from any harmful insect, it is necessary to sprinkle it with mustard powder after it ceases to bloom; the use of onion peel infusion has the same efficacy;
- The shrub needs to be treated with garlic tincture, which is extremely easy to make: a glass of garlic teeth is crushed, filled with warm water, infused for several hours; infusions of onion peel, tobacco or dandelion leaves and roots are prepared in the same way, and you can also use laundry soap (a briquette on a bucket of water);
- yellowing of leaf sheets of currants prevents tomato leaf infusion;
- a tool such as wood ash will easily and quickly deal with diseases; in the spring it is necessary to sprinkle the bushes;
- serum is a unique tool that will save from any disease; dilute the product liter in nine liters of water and then spray the shrubs.
Important! These means should be used to treat the plant after the harvest has been gathered. Folk remedies are incredibly effective and safe for health.
Chemical means are most often used only if the disease is extremely advanced, and folk methods have proved to be powerless. Chemicals will help save the plant from diseases and pests, as well as maintain its health. Such chemicals are effective and safe as:
- “Decis” and “Kinmiks” are means that do not allow leaf plates to turn yellow, they must be used when the buds of the plant swell and the first young green appears;
- The following drugs can cure any disease: Bordeaux liquid, colloidal sulfur, Topaz, Fundazol; they should be used once every ten days; if the plant is affected by anthracnose, the shrub needs to be processed in March or a few weeks after harvesting the fruit;
- after the flowers of the plant have bloomed, you can apply preventive means "Agravertin" and "Fitoverm";
- “Envidor” and other acaricides will help save the bushes from spider mites and aphids; the plant must be sprayed in the spring or after picking the fruit;
- if the shrub struck a fungal disease, you should pay attention to the copper sulfate.
Aphid experienced gardeners win with insecticides, which are used only before the flowering period or after collecting the fruits of the shrub. If an insect is noticed earlier, it is necessary to remove the affected parts of the culture from the garden. If the spider mite is seen at an early stage, it should be abundantly watered the bush with a powerful pressure of water and repeat the process for several days. And also should be processed culture of garlic, onion or tobacco infusion, as mentioned earlier. If folk remedies did not give results, you can use insectoacaricides or acaricides.
Glassware is an insect that is extremely difficult to get rid of by exposure to chemical agents.Therefore, it is better in the spring and summer to loosen the soil around the plants, and in the fall to get rid of the branches and foliage that remain after pruning any fruit bushes or trees, which will help prevent the infestation of currants from this parasite. To rid the bush of columnar rust, fungicides or bordeaux should be used. First, the plant is processed when the greens bloom, then - when the buds are tied. The third processing occurs during the end of flowering.
If the currant is too affected by the disease, it is necessary to treat it a fourth time 10-14 days after the third. Leaf plates that have been hit and fallen on the ground should be carefully collected and burned and then ground through the bush.
Bordeaux liquid is also used to control the rust. It is necessary to spray in the same way as in the case of columnar rust. A very effective drug to combat this disease is "Fitosporin." This is a fungal disease, so the infected leaf plates should be burned. It is quite difficult to determine the terry in the early stage of the disease. And when the disease enters into full force, the shrub can not be saved. So that the disease does not spread and does not hit other plants, you should get rid of the sick bush by digging and burning.
The best means to fight the sphere library are Topaz and Fundazol. Do not use them when the berries are only ripe. In the period of blooming greens should use copper sulfate and a variety of means that contain copper. It is necessary to process not only shrubs, but also the soil under them. In March, before the buds bloom, you can spray the plant with Nitrofen (three hundred grams of the drug per ten liters of water).
The tool can not be used every day.
Powdery mildew can defeat ordinary soda. It is best to use calcined. Many gardeners purchase an inexpensive laundry detergent containing this product. You can prepare a solution of manganese, whey or low-fat milk, adding a little iodine. Villagers who grow berries, get rid of this disease through fresh mullein, which must be insisted for three days. It should be a third of a bucket of manure pour water, let it brew. The infusion is filtered and once again diluted with water. It is necessary to spray means with a broom.
There are many options to combat the fungal disease anthracnose. Two-percent "Nitrafen" or one-percent "Dnokom" should handle the soil, fallen leaves and the plants themselves. Reprocessing should be done before the kidneys swell. A one-percent solution of Bordeaux liquid is also effective against this disease. You can use "Cineb" or colloidal sulfur. These funds are needed for preventive purposes.
The first time the plant is processed after the flowering period. Then processing is carried out a few weeks after harvest. A one-percent solution of copper sulfate is a remedy that is worth treating the bushes and the ground in March, before the buds begin to swell. In the fall, you can use Ftalan or Kuprozan. A few more good drugs that relieve anthracnose: "Gamair", "Fitosporin-M", "Fundazol", "Topsin", "Previkur".
How to handle?
To keep currant leaves dry and healthy, fresh and green, The following treatment guidelines should be observed to help gardeners do no harm to shrubs:
- spray, sprinkle or treat the plants in any other way for the first time during the swelling of the kidneys;
- the second time processing is carried out before the flowering period;
- the third treatment is carried out in the autumn time: it is necessary to dig up the land between currant bushes, it is important to ensure that the root system is not damaged, such a measure will allow to get rid of the parasites in the soil in order to survive the winter.
If the gardener uses chemicals, you should read the instructions very carefully and ensure that the dose of any drug is not exceeded, otherwise the bush may die.
Some parasites can get used to different chemicals, so you should not use the same tool all the time. You can not spray such means shrub during the ripening of the crop, as this may affect the health of people. If the gardener makes the solution wrong, it can harm the crop, burn its greens and destroy the branches, so you should do everything strictly according to the instructions. Processing is carried out either early in the morning or late in the evening. If you spray berry bushes during the day, the process may be ineffective and useless.
Some means of culture treated with a broom. If you need to spray abundantly, you should choose this option. If too much processing is not needed, you can use the spray. If after the first treatments the gardener did not see good results, it means that it is necessary to repeat the spraying again. If, after the fourth time, the owner of the shrub has not gotten rid of the disease, it is worth using another means that includes other poisons.
Prevention
In order to prevent the infection of shrubs with dangerous diseases and rid themselves of the attacks of parasites, The following guidelines should be used to help gardeners not to face problems of this kind:
- all fallen leaves must be carefully collected and burned outside the garden so that the fungal spores that hibernate in them cannot be transferred to the plants; it is better to get rid of not only currant leaf plates lying on the soil, but also of others, because many insects are able to winter in the leaves from any plants;
- if autumn is dry, after the leaf plates fall off, the soil should be watered abundantly, and when it dries, it is necessary to loosen it, but try not to damage the root system; it is important to provide access to fresh air, otherwise the plant may die or get sick;
- the branches that are withered or damaged by insects need to be cut; regulatory pruning should be carried out in a timely manner, and the cuts are well lubricated using garden warrior;
- To prevent pests from destroying the plant, prophylactic treatment should be carried out using insecticides to help protect the crop from problems associated with various insects;
- working with this culture, it is important not to cause mechanical damage to the bark;
- in order to prevent damage by terry, you need to constantly monitor young plants for four years and actively fight against such a pest as a bud mite, which is actively tolerating the disease;
- to enhance the immune system of the shrubs, it is necessary to feed them with the following mixture: a tablespoon of copper sulfate + three grams of ferrous sulfate + 0.4 teaspoon of boric acid + 0.8 tablespoon of potassium sulfate; This solution allows the plant to become strong and strengthen resistance to diseases and parasites.
Spring is the time when work begins with berry bushes, since in March the buds have not woken up yet, and sap flow is suspended. First, it is necessary to treat the plants with hot water so that pests and diseases cannot destroy it. And it also helps the bush to fully develop and abundantly bear fruit in the future. Water should be heated to +80 degrees, then water the bushes with a watering can with a divider. Ten liters of fluid is enough for several plants.
After the procedure, you need to cut the bushes (get rid of damaged and weak shoots, slightly trim the ends of the branches that froze over the winter, thin out the shrub). What has been cut, you must burn, and slices (diameter - eight millimeters) must be processed.
In March, berry bushes and the land on which they grow with a two percent solution of Nitrofen or Karbofos should be cultivated. This will help protect the plant from virtually any disease. After that, after some time you need to spray currant Bordeaux liquid. When spring comes into full force (in May), sometimes the culture is sprayed with “Fundazole”. Such prevention will allow gardeners not to worry about the occurrence of any disease.
Many were faced with the question - how to handle currants, so as not to be attacked by various parasites. "Karbofos" or "Nitrofen" can help in this problem. They will save the plant not only from diseases, but also from pests. In order for the bud mites to not multiply and probably left the shrub (provided they have already managed to settle there), you need to spray the plant with plenty of water and wrap it in plastic.
Better to do it in hot weather. If this procedure is sometimes repeated, ticks are unlikely to ever attack a culture.
How to feed the shrub?
Gardeners who constantly make lots of fertilizers do not know what diseases and pests are. Their plants have good immunity, are healthy, strong and resistant to any problems. Therefore it is necessary to monitor the doses and the period of feeding. If at the time when the shrub was planted, the correct amount of various useful fertilizers was applied to the soil, it means that for at least two years he does not need additional fertilizing. It should start from the third year, at the beginning of the growing season, when the ovaries begin to grow, and also after the plant ceases to bear fruit.
In the spring most often currants are fed with nitrogen fertilizers. Ammonium nitrate is a popular agent (60–75 grams per plant). When the fruits begin to form, you should use the fertilizer "Uniflor Micro" (two tablespoons of the drug per 10 liters of water). After the fruits are collected, you can make a top dressing, which includes potassium and phosphorus. A tablespoon of chlorine-free potassium and a tablespoon of double superphosphate in granules are poured onto the soil of the plant. All this is filled with 10 liters of liquid, if the weather is dry. If there is heavy rainfall, you only need to leave fertilizer on the ground.
It is important to remember that the life and health of the bush are in the hands of its owner. If you take care of the plant badly, forget about feeding, pruning, preventive treatments and thorough examinations for diseases and pests, the plant will become frail, weak, start to yield poor crops, and may also infect other bushes next to it with their diseases.
To avoid a large number of problems, it is necessary to water currants in a timely manner, get rid of weak and affected areas and ensure that it develops correctly.
The result of processing the yellow leaves on the currants, see the following video.