Plum - one of the most beloved garden trees. In terms of popularity, it is superior only to pear and apple trees. It is unpretentious and relatively resistant to many infections, but sometimes the tree starts to hurt. Why do the plum leaves turn yellow, if there is still a lot of time before the autumn cold, and how can this be caused? Most likely, the roots of the tree suffered.
Behold the root
Firstly, it can be a consequence of improper landing. Root flooding can occur in areas with high groundwater levels. Their side branches die, and the nutrition of the tree deteriorates. First of all, the leaves of the middle tier suffer, they begin to turn yellow and fall off. Plum can also react to strong drying of the ground during the growing season.
On carbonate soils, chlorosis may begin near the tree. The plum leaves (photo) turn yellow, only a narrow strip along the veins remains green. Over time, most of the leaves begin to turn black and dry edges. The use of drugs such as "Chelate" and "Antikhlorozin", can save the plant.
Why do the plum leaves turn yellow if the growing technology is not broken? The reason may be frostbite. If branches and stumps are damaged, they can be cut off. The damage to the wood roots is not so noticeable. They die off gradually, ceasing to supply nutrients to the top of the crown. To restore the root system, a tree needs a long period. Just one freeze is enough for the consequences to affect the condition of the fruits and leaves for several years.
Yellowing of plum leaves can react to a developing fungal disease or to the onset of pests.
The causative agent of the disease is the soil fungus Verticillium arbo-atrum. It is common in all climatic zones, and affects the stone fruits: plum, apricot, cherry plum. It penetrates inside the tree through the wounds in the roots and quickly spreads upwards. With his mycelium, he clogs the channels through which water and nutrients flow. That is why the plum leaves turn yellow and curl from the bottom to the top. Sometimes plums die immediately, sometimes for a long time are in a deplorable state. If the disease has started recently, you can start spraying "Previkur", "Vitaros" or "Topsin-M". To prevent the spreading of the fungus in the garden, it is impossible to plant crops susceptible to verticillus between crops: plum, strawberries, all solanaceous. Sick trees are best destroyed and the soil disinfected.
A very dangerous disease caused by the fungus Monilia. Its spores penetrate into the pistils of flowering plums and germinate, causing the flowers and young leaves to shrink and then the branches die. The parasite affects the fruit, germinating in them gray-black spots. It multiplies rapidly in cool and high humidity conditions.
To cure the tree, it is necessary to cut the dried branches, collect and burn fallen leaves and fruits. Before flowering and after it should be sprayed with preparations "Chom" or "Horus".
Until 1962, the fungus Coccomyces hiemlis Higg was considered a quarantine object. Coccomycosis is another reason why plum leaves turn yellow. After penetration of the fungus, very small specks appear on them. Gradually merging, they spread over most of the leaf. On the underside you can see the white and pink spores of the fungus. Sometimes the leaves do not fall, but turn brown and dry. Fruits cease to develop, the tree is greatly weakened, winter resistance is reduced.
To combat the disease, three sprays of copper oxychloride or Bordeaux liquids are sprayed: during the formation of buds, immediately after flowering and after picking the fruit.
This is a sucking parasite of pale green color. At first, aphid colonies are localized on young shoots, but can quickly spread throughout the tree. Because of its activity, leaves on a plum roll, their edges turn yellow, wilted and fall. Sticky aphids on the underside of the leaves can choose a sooty fungus that can destroy shoots.
To combat insects, it is necessary to completely remove the shoots. In the spring, the tree is treated with “Inta-Vir”, the trunks and skeletal branches are covered with whitewash twice a year.
Non-hazardous causes of yellowing of leaves in the plum at their summer cottage
When should you not worry when a symptom occurs?
- When planting a young seedling. If yellowing of the leaves is observed during this period, then the root system of the young tree simply does not cope at the time of engraftment. This happens if the roots were damaged when the plum was planted.
- With an unsuccessful choice of landing site. Plum sensitive to the amount of moisture. In wetlands or lowlands with high water levels on the surface, young roots rot, leaf mass loses nutrients. The leaves of the middle tier turn yellow first, then dry out and fall.
When these problems correct the position of a tree transplant in a favorable place (in the second case) or strengthen the root system with special preparations. It is necessary to help the tree, otherwise it may die.
Tip # 1. When the leaves turn yellow before the end of the vegetative period, immediately begin to find out the reason, so as not to lose time.
Ways to eliminate agrotechnical causes of yellowing of leaves in plums
There are the following ways to eliminate agrotechnical causes of yellowing:
Root freezing requires precise definition. When a symptom is confirmed, a restoration cycle of roots is used, including agrotechnical measures, food with special compositions, regular loosening of the soil in the near-barrel circles.
Planting frost-resistant and zoned plum varieties on the site.
loosening and mulching of the near-stem circle.
Ways to eliminate yellowing of leaves on plums from diseases and pests
Ways to eliminate yellowing of leaves on plum:
Remove solanaceous crops and tobacco from the garden.
Spraying (three times) Bordeaux liquid (1%) or zineb suspension (0.5%).
In the advanced stage of the lesion, the soil and crown are sprayed with a solution of DNOC (1%) or copper sulfate (18%).
Chamomile, wormwood, or garlic extracts work well.
To treat the swelling of the kidneys with Inta-Vir.
Remove affected growth and burn.
Signs of nutritional deficiencies in yellowing of leaves on plums
Yellowing of leaf plates along the entire length of the shoots - lack of oxygen or organic matter in the soil. How to fix:
- launch into the soil near-stem circles of earthworms for loosening,
- introduce organic matter with simultaneous loosening and irrigation.
Yellowing starts from the bottom of the shoot and spreads upwards - a violation of nitrogen nutrition. We fix:
The beginning of the yellowing of leaves from the top of the shoot is iron deficiency in the nutrition of the tree. How can I help you:
- dig deep grooves in the near-stem wheel, add 400 g of vitriol and iron and fill with water,
- Anti-chlorozine solution (100 g per bucket of water) is poured onto the roots.
The yellow color between the streaks of the leaf plates is a little zinc wood. We correct the situation with one of the options:
- spray the crown with zinc sulfate solution (20 g is enough for a bucket of water),
- add 350 g of zinc sulphate to 2 kg of sulfur in the near-stem circle (for a young tree, the dosage is half as much!),
- spray twice with a solution of zineb (in a bucket of water 40 g) + colloidal sulfur (80g).
Tip # 2. In no case do not put under the drain not rotten manure or fertilizers with alkaline reaction, so as not to harm the tree.
Yellowing of the leaves due to gardener's mistakes when growing plums
Gardeners violate the requirements of agricultural engineering and do not pay enough attention to the choice of planting material, which leads to yellowing of leaves until the end of the growing season:
- Get saplings with a weak or damaged root system.
- Non-zoned varieties are planted that do not withstand climate fluctuations in the region.
- Planting plum trees is placed in areas of the garden that are unfavorable to the tree.
- Do not withstand preplant requirements for soil preparation.
- Do not provide drainage in areas with stagnant moisture.
- Do not conduct regular preventive examinations of the garden with the purpose of identifying diseases and colonies of parasites.
- Violate the terms of treatments and dressings plums.
- Illiterately cut and form the crown of the tree.
Questions gardeners on the treatment and prevention of yellowing of leaves in plums
Question number 1. How does the level of water balance affect the color change of the leaf plates and how can it be adjusted?
When dry soil roots receive less moisture and begin to dry, which leads to yellowing and drying of the foliage. It is necessary to ensure frequent moderate watering of the tree to restore the viability of the root system. With excessive moisture, roots begin to rot, which also leads to an imbalance in the nutrition of the leaves, and they turn yellow. It is required to reduce watering, to divert water from the zone of the near-barrel circle, to break through it.
Question number 2. What measures will help to avoid the appearance of diseases on the plum, leading to yellowing of the leaves?
In addition to preventive treatments and compliance with the requirements of agricultural engineering, pay attention to the following issues:
- weeding and removing weeds in the garden,
- mandatory uprooting of mushrooms at the base of the tree, removal of organic residues from the site,
- timely cleaning of rotten grass and fallen leaves.
Question number 3. During the period of prolonged summer rains there is yellowing of the leaves on the plums. How to help the trees?
The reason lies in the excess of moisture, which stagnates in the place of growth of the tree. In case of single or rare cases, it remains to wait for the tree to recover on its own. Lay grooves to drain water. If this happens annually and en masse, it will be necessary to transplant the trees to a place higher than the former, so that moisture does not accumulate in the area of the root system.
Question number 4. I strictly comply with the requirements of the agrotechnology of plums, carry out watering schedules and fertilizing, carry out preventive treatments, and the leaves turn yellow on the trees. What is the reason?
In freezing. This may be a single case, but the recovery period of the tree is slow, especially if the root system is damaged. It is less noticeable, but leads to malnutrition of the leaves and yellowing. Help to restore the work of the roots after frost damage. With a weak defeat will save the timely and competent pruning crown.
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Causes of yellow plum leaves
The normal color of the leaves of most plants is considered to be green. Any other - indicates the presence of problems. But there are situations when this is normal.
Plum - quite unpretentious plant compared to cherry plum. It grows and bears fruit in different parts of Russia. The main harvest time is at the end of summer - the beginning of autumn. For this reason, if the yellowing of the leaves happens in June or July, measures must be taken. There are several explanations for this coloring at the height of summer. Some of them are caused by processes occurring inside the plant, others are related to external circumstances.
Root System Issues
Problems of this kind are a common cause of yellow plum leaves. In this case, they also twist into a tube. Roots - the most important part of the plant, so they should pay attention first of all:
- damage could have occurred even before the purchase: the young sapling could not settle down, the same applies to the transplanted plum,
- groundwater comes too close, leading to flooding - this happens in the spring during a flood,
- The landing site was chosen incorrectly - swamped soils instead of sandy or loamy ones preferred for plums.