Hydrangea is a universal plant that feels great both in the room and in the flower garden. Shrubs have bright green leaves, nature has endowed the culture with a wide variety of colors from white to purple. Each owner always wants his plants to be in good health, but during the growing process, sometimes problems arise, for example, twisted leaves in hydrangea. This disease will be discussed later.
This culture is demanding of care activities. There are a number of factors to which a very acute reaction is caused in a plant. Diseases of leaf plates provoke:
- bright sunshine;
- excess watering;
- lack of nutrients;
- soil acid index changes.
Hydrangea appearance
Yellowing and shedding of foliage indicate that watering is insufficient in hot weather, and there is also a shortage of minerals. To prevent aggravation of the situation, increase the amount of water and introduce fertilizers. Multiplicity of application - once every 10 days.
In the first case, the appearance of brown dry spots is characteristic, they gradually spread throughout the foliage. The disease manifests itself in two cases: with excessive water hardness and from sunburn. As a treatment, they shade hydrangea and defend the irrigation fluid.
In the second disease, leaf plates become soft, shapeless and darken. The reason is sharp temperature drops, heavy soils, excess moisture. The way out in this situation 2: elimination of irritants or hydrangea transplantation.
This ailment occurs in cases where daily temperature jumps take place. Soil quality and the insufficiency of useful trace elements also affect plant health. Before talking about treatment, as well as preventive measures, you need to get acquainted with the symptoms.
Hydrangea chlorosis
How does the disease manifest
- Yellowing of leaf plates;
- The edges of the leaves are twisted in a boat;
- Fall off;
- Buds and flowers lose their shape, and the plant drops them;
- The top of the shoots will dry;
- The root system stops in development, dies;
- The death of the plant.
Prevention and treatment
The best crop protection measures are soil control and the creation of a suitable acidic environment. If you miss the moment, you have to fight with chlorosis.
Recommended Activities:
- land change;
- organization of irrigation with an oxidizing agent;
- iron is added to the soil and water.
On a note. The plant absorbs iron best in chelated form, so you should choose the products that contain it. The solution is sprayed with shrubs, also apply under the root.
Those who do not trust modern drugs are invited to make a treatment for themselves.
Recipe number 1:
- ferrous sulfate - 2 grams;
- citric acid - 4 grams;
- water - 1 liter.
The resulting mixture is used to spray leaves.
Recipe number 2:
- calcium nitrate - 40 grams;
- water - 10 liters.
It is used for irrigation, it is carried out several times, therefore, calcium nitrate is replaced with iron sulfate in the same amount and is again brought under the root.
All this will help to avoid such a phenomenon as hydrangea leaves curl around the edges.
Another name is downy mildew. The disease is manifested by the spread of dark oily spots on large-leaf culture. The fungus is characterized by active reproduction under favorable conditions. These are increased humidity and stable temperature indicators from +18 to 20 ° C.
When choosing a means to combat peronosporosis, you need to pay attention to the fact that they are included in the fungicidal group.
Blue vitriol
When making the solution yourself:
- copper sulfate - 15 grams;
- liquid soap - 150 grams;
- water - 10 liters.
Important! The above remedy will overcome the disease if it is at an early stage.
Why are hydrangea leaves curling?
There are a number of fungal ailments that a plant lover may encounter.
White rot
The root system is initially affected, as pathogen fungi are in the ground. The plant ceases to receive the nutritional components necessary for life, acquires a brown color, sometimes foliage begins to wrap, and then death occurs.
The most striking symptom is the formation of a white cotton-like plaque on the shoots, as well as a change in their color to a darker one. If untreated, black spots appear on the plaque. They are called sclerotia.
For treatment use:
- "Fitosporin";
- "Fundazole";
- copper chloride.
Gray rot
Plant tissues become soft and watery. With excess moisture, cultures are covered with gray down. If the weather is dry, then the affected areas begin to dry out, then die off. As a result, leaf plates and stem parts become leaky.
At the first stage of the fight against the disease, it is necessary to remove the affected and dead parts of the plant. The treatment is carried out with Purebloom, Skor, Fundazolom. Means most effectively show themselves for indoor varieties of hydrangea. The garden plant needs to be treated three times with "RovralFio 255 SC". The break between the procedures is 21 days.
The following symptoms are characteristic:
- the appearance of brown-dark spots;
- gradual withering away and falling of leaf blades.
If you do not carry out the treatment, then all the leaves will fall off the plant, and it will die. The neglected form is manifested by the transition of spots to shoots.
Manifestations of Septoria
Septoria can be defeated by the removal of all affected parts, followed by treatment of the culture with copper-based agents. Copper sulfate, copper oxychloride are suitable, they will prevent the leaves from folding hydrangea.
Identification of the disease is carried out by the appearance of green-yellow spots, then they turn brown and become clear in shape. On the underside, leaves are covered with a touch of gray or purple.
Lack of treatment leads to leaf fall, deformation and death of young shoots in the winter.
Treatment is carried out with drugs:
- "Fitosporin";
- Alirin.
If the disease has passed into an advanced stage, then it is better to use:
- "Pure flower";
- Tiovitom;
- "Topaz";
- Jet
- "Soon."
Why do hydrangeas fold leaves? Diseases of this type are infectious and enter the garden through garden tools, from nurseries where new tree-like plants were purchased, from already infected green inhabitants, insect pests are also carriers.
Ring spotting
The disease is most dangerous for panicle hydrangeas, it manifests itself as follows:
- ring-shaped spots will appear on the leaf plates;
- foliage twisting and its falling.
There is no cure for ring spotting. Nothing can be done here, the only way is to destroy the diseased shrub and preventive measures.
This ailment appeared not so long ago, most often weak plants suffering from mechanical damage suffer from it.
Symptoms:
- Brown spots appear. Both leaves and stems are affected;
- Small ulcers form under the spots on the back of the leaf plate;
- Foliage may curl.
The disease is not treated. Affected plants are burned to prevent an epidemic.
Often, green spaces suffer not only from ailments, but also from pests. Depending on who attacked the plant, treatment measures are selected.
Leaf aphid
From such insects, depending on the size of the colony, measures are used:
- Washing plants with soapy water or a stream from a hose. In the latter case, care must be taken not to damage the hydrangea;
- Large colonies are destroyed by insecticides such as Sparks or Bison.
Spider mites
Their appearance is determined by the presence of small spots of red color. They can be on leaves and stems. Leaflets are often curled and folded. The treatment tool is chosen depending on the number of insects:
- Small colony - leaf plates are washed with soapy water or mineral oil;
- Special tools will help with a large spread. Most often they use Lightning and Akarin.
Spider mite
Gall Nematode
Refers to microscopic worms. The defeat begins with the root system, then further along the trunk. Caustic discharge of parasites poison the entire plant.
Infection can be detected by the formation of galls of red color on the root system and at the base of the stem part.
The way to fight are preventive measures:
- for successful propagation in the soil of predatory nematodes and special fungi - parasites of worms, a small amount of sugar is put into the ground;
- Before planting the plants, they cultivate the land with Actofit and Fitoverm.
Gall nematode defeat
To ensure that cultures always remain healthy and delight owners with lush flowering, measures must be taken to prevent the development of ailments or minimize their appearance:
- Track soil acidity. Use soft water for watering. Feed with nitrogen with great care.
- If necessary, arrange shading for hydrangea in the hot summer period, so that there are no burns on the green parts of the bushes. Over-dried soil contributes to the appearance of powdery mildew and peronosporosis, so close attention should be paid to humidity.
- Buying quality, healthy planting material. Periodic disinfection of garden equipment. Timely removal of diseased plants.
- Treatment of shrubs in spring with fungicides to prevent fungal infections.
Any disease is always easier to prevent than to cure. By observing the simple rules outlined in the article above, you can minimize the risk of a particular illness. At the same time, the reasons why hydrangea leaves were twisted and what to do in these cases were highlighted.
