The leaves of the grapes are curled
Content:
If you notice any deformation of leaves in plants, this is the first signal to check them. You cannot immediately start active actions to eliminate leaf curling, first you need to find out the reason. Next, you will find out what could lead to leaf deformation and what diseases cause it.
Visible signs that the leaves are curling.
It often seems to novice gardeners that all the leaves are twisted the same way, but this is not entirely true. The kind of deformation will help you understand what happened to the plant.
The edges of the leaf curl to the center and upward, most often these are signs of infection with some kind of virus.
Bending down of the leaf plate indicates that the plant lacks nutrients.
There are a number of deformations that occur due to uncomfortable environmental conditions.
Any kind of leaf deformation shows that something is wrong with the plant; such phenomena cannot be overlooked.
What can the curling of the leaves lead to?
There are several risks.
Due to the lack of the ability to work normally, damage to the leaves brings harm to the entire plant: the process of respiration and the flow of nutrients to parts of plants are significantly complicated.
Due to metabolic disorders, fruits and flowers do not receive enough nutrients. The fruits shrink and fall off very quickly. If you do not notice the changes in time and do not start to fight against it, the plants may die.
What causes the leaves to roll.
If there is not enough oxygen.
The sheets are not necessarily deformed due to diseases, deformation may occur due to changed environmental conditions. Lack of oxygen can negatively affect greenery, it is caused by the rainy season, water takes the place of oxygen in the soil. At the edge, the leaves become denser and because of this deformation occurs. If you remember that such an effect gives an excessive watering, then you need to stop it and dig up the ground, thereby giving oxygen access to the roots. When oxygen begins to flow into the plant, new shoots will begin to appear, the damaged ones will need to be cut off.
If watering is not enough.
Another reason for curling can be a lack of moisture in the plants. If the leaves are curled down, the plant lacks potassium. This can be seen only closer to the end of the season, when the distribution of elements over the plant ends and at first the leaves begin to change color and then curl. The lower tiers of leaves turn yellow in white grapes, and in colored ones they turn brown. Lack of potassium will also affect the yield and size of the fruit. They will be smaller and will not be able to be stored for a long time.The shoots will quickly begin to turn into wood and will not be able to survive the winter. Unfortunately, all these signs only appear at the end of the season.
If there are not enough phosphorite elements.
With a lack of phosphorus, young leaves are darker than adults and are slightly curled upward. At the bottom, the leaves begin to curl downward. In the absence of the proper amount of phosphorus root system also functions worse, and the fruits become smaller and not as tasty. If you have acidic soils, you are at risk.
If there are not enough molybdenum elements.
The leaves become spoon-like when the plant lacks molybdenum. The process begins when the berries begin to ripen. Also, the leaves become mottled and gradually change color to a color similar to rust.
If there are not enough zinc elements.
The leaves lose their symmetry and bend up at the edges if the plant lacks zinc.
If several items are missing at once.
If the nutrition of the plants is wrong, then they may lack several substances. The result is an unclear and often incomprehensible picture of symptoms that can confuse a person. A foliar trial feeding should be done. The drug is applied to the sheet and marked. You can apply several fertilizers at the same time, just on different leaves. After a few days, you need to see if something has happened to the leaves.
What are potash and phosphorite elements required for?
If you need to understand whether a plant needs potassium and phosphorus, then this is done through root fertilization. The effect will appear within three weeks. If nothing has changed, then the reason lies elsewhere. The most common cause will be illness.
Viral leaf rolling and how dangerous it is
There is a disease called viral leaf rolling, which can cause leaf deformation in addition to the weather. The first signs begin to appear in early summer, on the lower leaves. Spreading occurs from the bottom up. The edge of the sheet is folded down, the sheet loses its rounded shape and turns into a triangle.
For a long time, the disease almost does not give a sign of life and this is very bad. In most cases, the virus will enter the plant with the vaccine. There may be confusion with a lack of potassium, the changes are very similar. No one can guarantee you that the plant is not contaminated when you buy it.
How to carry out prevention
It is very important for prevention to properly process the soil before planting. It is important to create good conditions for plant growth. Below will be presented a scripture of soils suitable for grapes.
First requirement.
Optimal soil acidity for grapes: pH from six and a half to seven - approaching neutral values. It is better if the soil is fertile, but not too fertile.
Second requirement.
Due to nitrogen on acidic soils, a lack of trace elements is created. Due to nitrogen, the green mass of the plant increases and, as a result, fruits, buds and flowers lack useful elements important for their ripening and development. The yield may decrease and the quality of the fruit may deteriorate.
Third requirement.
When the plant lacks such substances as potassium and phosphorus, the whole plant gradually loses strength and withers. Before and during planting, it is very important to properly prepare the soil, it is better to do this for some time. It is necessary to structure the soil. If the soil is heavy, it is recommended to add coarse sand and possibly peat to it. In the presence of sandy soil, peat fertilizers are most often applied to it.
Fourth requirement.
If the site is initially not rich in soil, it will have to be completely replaced, it is convenient to do this by digging a ditch. The normal size for one pit (for one plant) = seven hundred centimeters by seven hundred centimeters, and the depth cannot be less than a meter; grapes have a complex root system consisting of five tiers and it needs enough space.
About organic feeding.
Humus is introduced as an organic top dressing, twenty to twenty-five liters per meter, then it is very important to monitor the condition of the soil around the plant, it is important to monitor the absence of weeds and any grass. Weeding and mulching the soil will help you fight off pesky excess plants.
About mulching.
Mulching greatly helps summer residents and gardeners in caring for grapes. Regular cut grass is suitable, it is important to remove plants with seeds. It is also possible to use wood chips, bark and manure. But dried. Mulch helps to reduce the evaporation of liquid and works as a delayed fertilizer.
Important! If you use mulch during periods of heavy rainfall, you can harm the plant with excessive moisture. Oxygen starvation may occur.
Other options to overcome the process of rolling and folding grape leaves.
rolling vine leaves
There are several guidelines.
First recommendation.
When using organic preparations before and during planting, the risk that leaf deformation will begin is reduced to a minimum. Thanks to the microorganisms contained in the EM preparations, the soil fertility increases. At the same time, the effect of pathogenic flora is reduced, which has a good effect on plants.
Second recommendation.
If the curl is caused by a virus, it cannot be cured with medication. When drugs of the EO category are introduced, the risk of infection is reduced, the growth of drugs does not allow the growth of infectious agents that cause leaf deformations.
Third recommendation.
When organic substances interact with nutrients, the latter acquire a form suitable for assimilation by plants. The grapes, under good environmental conditions, can fight curling themselves. Environmentally friendly EO preparations have a good effect on both plants and flora; they also do not harm any forms of living organisms, including humans and animals.
Comparison of substances used to relieve and prevent curls
Such EO preparations are often used.
Baikal EM-1.
Baikal EM-1 is used to increase the number of fruits, with the help of it the soil becomes more useful.
Emochki.
Emoji - is characterized by a high content of beneficial microorganisms: various fungi, yeast, bacteria that contribute to the process of photosynthesis and oxidation. Used as an antiseptic, for one hundred square meters, you will need to dilute each liter of the drug with ten liters of water.
Disadvantages of such drugs.
Disadvantages of using the listed drugs: it is impossible to combine use with any other forms of dressings and fertilizers, it is impossible to use in the fall as they act only at temperatures above twelve degrees.
Vermisol
Vermisol - contains humic acids, many vitamins, bacteria for oxidation and various trace elements. Improve plant immunity.
Disadvantages of vermisol
Minus - can be used only when constant warm weather remains outside.
Popular questions and answers to them
What can be used as a drug in the fight against curling of grape leaves?
The answer to the question.
At the moment, a drug with such capabilities has not been created. Prevention is very important to improve the condition of the grapes. Fertilizers containing phosphorus and potassium are best suited for fertilization; wood ash is a good top dressing. It is important to take into account that the ash must be from under clean wood, that is: not painted, not glued, not varnished.
What to do to determine what trace elements a plant needs?
The answer to the question.
If there are leaves that you think are deformed, you can process them and mark how you did it. If for some time the effect is visible, you have found a remedy and identified the disease. If the effect is not visible, the next drug should be tried.
Conclusion.
EOs will help you get rid of curling leaves and your plants will feel very good.