Why do currant leaves 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 harvest to be large and the plant to be healthy, it is necessary to clearly know for what reasons the leaf plates of the shrubs began to turn yellow and fall off, and also what to do in such a situation. The reason for this problem is extremely simple to find out, you just need to take a closer look at the culture. This may be a defeat by some disease or an attack by one of the pests.
The reasons
To properly deal with the problem, you must first find out what exactly happened to the bush. Every disease or parasite infection has its own characteristics, even if they are similar. Therefore, the more carefully the gardener studies the culture, the faster he will find out what happened to it. Most often, diseases affect crops in May and June. Various symptoms can indicate a problem the grower is facing.
Leaves may turn yellow and fall off due to dangerous parasites, various diseases, or improper plant care.
Wrong care
If you take care of the plant correctly, it will develop well and give the owner a big harvest in the future. Before the shrub is planted in the soil, you should familiarize yourself with the basic rules and recommendations for care.Only then will it be healthy and durable. Gardeners very often make a lot of mistakes that lead to yellowing and falling off of leaf plates.
- Some inexperienced people plant shrubs in the wrong place. The way the currant will develop depends directly on whether the site for planting the plant is selected correctly. It is necessary to find fertile, well-moistened and loamy soil. It is strictly forbidden 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 sure that the distance between them is more than one meter.
- Gardeners who plant berry bushes in March are faced with a problem that can harm the plant - this unsuitable temperature for planting. At this time of year, sudden frosts can begin, which will lead to poor bud growth of the bush. The ideal temperature for planting a crop is + 18– + 20 degrees. So that the leaves of the currant do not turn yellow, you should plant in the fall.
- If there are no nutrients in the soil, this can affect the health of the leaf blades. For currants, nitrogen, potash and phosphorus fertilizers are extremely important, otherwise the culture will not be able to fully develop. For one bush, you must use forty grams of ammonium nitrate, the same amount of superphosphate and thirty grams of potassium chloride. When the plant is 6-7 years old, the soil around it should be cultivated with lime.
- Many face lack of moisture - This is the most popular and common problem of gardeners.Luckily, it's pretty easy to fix. It is important not to forget that the bushes require abundant watering in the summer, because in the summer the air temperature is extremely high. If you do not moisten the soil constantly, the leaves turn yellow, and the berries become small. Some of them wither before ripening.
- When planting plants, it is necessary to carefully examine 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 also become infected with diseases. There are several common diseases, the symptoms of which are yellowed leaf blades.
- Anthracnose - This is a disease that provokes a 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 eventually 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 begins to develop.
- Terry is a viral disease. Most often, this disease enters the bush with the help of a parasite - a spider mite. The leaves turn yellow, become more elongated, the flowers turn purple and double, the fruits may fall off or not develop.
- Sferoteka. The plant becomes infected with a fungus. Almost all areas are affected: leaf plates, branches, fruits. On them you can see a white coating that looks like a cobweb.Over time, it darkens, the leaves turn yellow and fall off rapidly. The fruits also fall off. This disease can be transmitted to currants from gooseberries growing nearby. If you run it, the infected areas begin to become covered with black dots.
- spotting - This is a fungal disease that is found on leaves and other plant debris in winter. Spores are spread by the wind. Leaves turn yellow and fall off.
- rust currants are infected by cereal weeds. The bottom of the leaf plates becomes swollen, convex (the swellings are red), then turn yellow and crumble.
Do not think that diseases can affect a plant only one by one. A shrub can get two diseases at once.
If the gardener noticed that the leaves turn yellow and begin to fall off, then the culture is definitely infected and it is necessary to use complex treatment (fight diseases with the help of folk or chemical remedies that will help get rid of the problem).
Pests
A similar symptom may also indicate that the shrub was attacked by parasites.
- kidney mite most often attacks blackcurrant. In one kidney of a plant there can be more than one thousand pests. The parasite is extremely small, making it very difficult to see. The only signs that the currant has this pest are the incredibly large size of the buds and yellowed leaf blades.
- Aphid - This is a common parasite that has ruined the crop of many gardeners. Symptoms that it was the gall aphid that struck the currant are yellow or red swellings on the leaves. In this case, it will seem to a person that the leaves have turned yellow or red.Soon they become darker, begin to dry and fall off. The pest uses the juice of shrub leaves as food; seven generations can visit it during the season. The insect is able to destroy many berry bushes in the garden, as it settles on absolutely any plant.
- Glassware - this is a butterfly, the larvae of which settle in the cores of young branches of a plant and, in two years, eat the pulp inside. Thus, they can gnaw their way down to the ground. Leaf plates that do not receive the necessary nutrients turn yellow and dry. To check if the glass cases attack the bush, you need to cut off one branch and see if there is a dark point on the cut.
- spider mite is a pest that settles on the back of the leaf, most often on young branches and leaf plates. The gardener can understand that the garden is attacked by spider mites by the presence of abundant cobwebs. Parasites have a small red body. Leaves infected with an insect become pale, yellow and dry, after a while they curl up.
Fighting methods
Once a gardener has figured out what exactly is causing the yellowing 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 out due to lack of water. This problem is solved very simply. Shrubs should be watered (two buckets per plant) and be sure to loosen the ground. If the weather, on the contrary, is too wet, you should constantly loosen the soil under the crop and prevent it from becoming waterlogged.
If there is a shortage of the substances necessary for the plant (most often this happens if it is in hard and infertile soil), the soil should be fertilized in 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 - an ash solution (a liter per bush). If there is too much peat or any 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 with the help of folk remedies such as:
- so that the plant does not become infected or get rid of the disease, as well as from any harmful insect, you should sprinkle it with mustard powder after it stops blooming; the use of infusion of onion peel has the same effectiveness;
- the shrub must be treated with garlic tincture, which is extremely easy to make: a glass of garlic cloves is crushed, poured with warm water, infused for several hours; in the same way, infusions are prepared from onion peels, tobacco or dandelion leaves and roots, and you can also use laundry soap (a briquette for a bucket of water);
- yellowing of currant leaf plates prevents infusion of tomato leaves;
- a remedy such as wood ash will easily and quickly cope with diseases; in the spring it is necessary to sprinkle shrubs;
- serum is a unique remedy that will save you from any disease; dilute a liter of the product in nine liters of water, and then spray the shrubs.
Important! These funds should be treated with a plant after the harvest is harvested. Folk remedies are incredibly effective and safe for health.
Chemical agents are most often used only if the disease is extremely neglected, and folk methods have been powerless. Chemicals will help save the plant from diseases and pests, as well as keep it healthy. Such chemicals are effective and safe, such as:
- "Decis" and "Kinmiks" are remedies that do not allow the leaf plates to turn yellow, they must be used when the plant's buds swell and the first young green appears;
- any disease can be cured by the following drugs: Bordeaux liquid, colloidal sulfur, Topaz, Fundazol; they should be used once every ten days; if the plant is affected by anthracnose, it is necessary to process the shrub in March or a few weeks after harvesting;
- after the flowers of the plant have faded, you can apply the prophylactic agents "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 is struck by a fungal disease, you should pay attention to copper sulfate.
Experienced gardeners defeat aphids with the help of insecticides, which are used only before the flowering period or after picking the fruits of the shrub. If the insect is noticed earlier, it is necessary to remove the affected parts of the culture from the garden. If the spider mite is noticed at an early stage, it is necessary to water the shrub abundantly with a powerful pressure of water and repeat the process for several days. And you should also treat the culture with garlic, onion or tobacco infusion, as mentioned earlier. If folk remedies have not yielded results, you can use insecticides or acaricides.
Glassware is an insect that is extremely difficult to get rid of by exposure to chemicals. Therefore, it is better to loosen the soil around the plants in spring and summer, 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 currant infection with this parasite. To rid the shrub of columnar rust, fungicides or Bordeaux liquid should be used. First, the plant is processed when the greens bloom, then when the buds are tied. The third treatment occurs during the end of flowering.
If the currant is too heavily affected by the disease, you need to process it for the fourth time 10–14 days after the third. Leaf plates that have been struck and fallen to the ground should be carefully collected and burned, and then the ground around the bush should be loosened.
Bordeaux liquid is also used to combat goblet rust. Spraying is necessary in the same way as in the case of columnar rust. An extremely effective drug to combat this disease is Fitosporin. This is a fungal disease, so infected leaf blades should be burned. It is quite difficult to determine terryness at an early stage of the disease. And when the disease comes into full force, the shrub can no longer be saved. To prevent the disease from spreading and infecting other plants, you should get rid of the diseased bush by digging and burning.
The best means to deal with the sphere library are Topaz and Fundazol. Do not use them when the berries are just ripening. During the period of greenery blooming, copper sulphate and a variety of products that contain copper should be used.It is necessary to process not only shrubs, but also the soil under them. In March, before the buds open, 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 be defeated by ordinary soda. It is best to use calcined. Many gardeners purchase an inexpensive laundry detergent that contains this product. You can prepare a solution of manganese, whey or low-fat milk by adding a little iodine. Villagers who grow berry crops get rid of this disease with fresh mullein, which must be infused for three days. A third of a bucket of manure should be poured with water, let it brew. The infusion is filtered and again diluted with water. It is necessary to spray the product with a broom.
There are many options for dealing with the fungal disease anthracnose. Two percent "Nitrafen" or one percent "Dnok" should treat the soil, fallen leaves and the plants themselves. Re-treatment should be carried out before the kidneys swell. A one percent solution of Bordeaux fluid is also effective against a similar disease. You can use Zineb 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 should be treated with shrubs and earth in March, before the buds begin to swell. In autumn, you can use "Ftalan" or "Kuprozan".A few more good drugs that get rid of anthracnose: Gamair, Fitosporin-M, Fundazol, Topsin, Previkur.
How to process?
So that currant leaves do not become dry and are healthy, fresh and green, the following processing recommendations should be followed to help gardeners not harm shrubs:
- spraying, sprinkling or treating plants in any other way the first time should be during the swelling of the kidneys;
- the second time the treatment is carried out before the flowering period;
- the third treatment is carried out in the autumn: it is necessary to dig the ground between the currant bushes, it is important to ensure that the root system is not damaged, such a measure will 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 make sure that the dose of any agent is not exceeded, otherwise the bush may die.
Some parasites are able to get used to different chemicals, so you should not use the same remedy all the time. It is impossible to spray bushes with such means during the ripening of the crop, as this may affect people's health. If the gardener makes the solution incorrectly, he can harm the crop, burn its greens and destroy 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 a berry bush during the day, the process may be inefficient and useless.
By some means, the culture is treated with a broom. If you need to spray abundantly, you should choose this option.If you do not need to process too abundantly, you can use a spray bottle. If after the first treatments the gardener did not see good results, then it is necessary to repeat the spraying again. If after the fourth time the owner of the bush has not got rid of the disease, it is worth using another remedy, which contains other poisons.
Prevention
In order to prevent infection of shrubs with dangerous diseases and save yourself from attacks of parasites, the following guidelines should be used to help gardeners avoid these kinds of problems:
- all fallen leaves must be carefully collected and burned outside the garden so that fungal spores wintering in them cannot be transferred to plants; it is better to get rid of not only currant leaf plates lying on the soil, but also others, because many insects are able to winter in leaves from any plants;
- if autumn turned out to be dry, after the leaf plates fall off, the soil must be watered abundantly, and when it dries up, it needs to be loosened, but try not to harm the root system; it is important to provide access to fresh air, otherwise the plant may die or get sick;
- branches that have dried out or are damaged by insects must be cut; regulating pruning should be carried out in a timely manner, while the cuts are well lubricated with a garden pitch;
- so that pests cannot destroy the plant, preventive treatment should be carried out using insecticides, which will help protect the crop from problems associated with various insects;
- when working with this culture, it is important not to cause mechanical damage to its bark;
- in order to prevent damage by terry, you need to constantly monitor young plants for four years and actively fight such a pest as a bud mite, which actively tolerates this disease;
- to increase the immune system of shrubs, you need to feed them with the following mixture: a tablespoon of copper sulfate + three grams of iron 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 with berry bushes begins, since in March the buds have not yet woken up, and sap flow is suspended. First you need to treat the plants with hot water so that pests and diseases cannot destroy it. And also it helps the bush to fully develop and bear fruit abundantly in the future. Water should be heated to +80 degrees, then water the shrubs with it using a watering can with a divider. Ten liters of liquid 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 have frozen over during the winter, thin out the shrub). What has been cut off must be burned, and the cuts (diameter - eight millimeters) must be processed.
In March, berry bushes and the land on which they grow should be treated with a two percent solution of Nitrofen or Karbofos. This will help protect the plant from almost any disease. After that, after a while, you need to spray the currants with Bordeaux liquid. When spring comes into full force (in May), sometimes the culture is sprayed with Fundazol.Such prevention will allow gardeners not to worry about the occurrence of any disease.
Many faced the question - how to process currants so that various parasites do not attack it. "Karbofos" or "Nitrofen" is able to help in this problem. They will save the plant not only from diseases, but also from pests. So that the bud mites could not reproduce and probably left the shrub (provided that they had already managed to settle there), you need to spray the plant abundantly with water and wrap it with polyethylene.
It is best to do this in hot weather. If this procedure is repeated occasionally, the mites are unlikely to ever attack the culture.
What to feed shrubs?
Gardeners who constantly apply a lot of fertilizer do not know what diseases and pests are. Their plants have good immunity, are healthy, strong and resistant to any problems. Therefore, it is worth monitoring the doses and feeding time. If at the time when the shrub was planted, the correct amount of various useful fertilizers was applied to the soil, it means that it does not need top dressing for at least two years. You 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, currants are most often fed with nitrogen fertilizers. A popular remedy is ammonium nitrate (60–75 grams per plant). When the fruits begin to form, it is worth using Uniflor Micro fertilizer (two tablespoons of the drug per 10 liters of water). After the fruits are harvested, you can apply 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 poured with 10 liters of liquid if the weather is dry. If there is heavy rainfall, you just need to leave the fertilizer on the ground.
It is important to remember that the life and health of the shrub is in the hands of its owner. If you take care of the plant poorly, forget about top dressing, pruning, preventive treatments and thorough examinations for diseases and pests, the plant will become frail, weak, begin to produce a poor harvest, and can also infect other shrubs next to it with its diseases.
To avoid a large number of problems, you should water the currants in a timely manner, get rid of weak and affected areas and make sure that it develops correctly.
The result of processing yellow leaves on currants, see the following video.