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Any living organism, including garden flower plants, is in great need of attention and proper care for them. Because they can often be affected by various pests or diseases, of which there are hundreds.

The most difficult problems to solve are rot and fungus in flowers. And if your aster has such signs of defeat, then you should know that they have a disease called blackleg.

This problem can manifest itself in many garden flowers, at least ten species can get sick with it. In recent years, this disease has been progressing, because planting material has been imported in large quantities from other countries.

The black leg appears when the plant was affected by the fungus while still in the seedling phase. Infection occurs through the soil.

Such fungi tolerate winter well and sleep until spring, and then wake up and begin their dirty work. They affect both the underground parts of the plant in any phase, and the ground ones, including leaves and stems.

Bacteria actively live on the neck of the plant, after which it becomes frail and dies.

This disease must be dealt with comprehensively. This includes activities such as picking, soil disinfection. It is made with a one percent solution of manganese, you need up to ten liters per square meter.

If you saw a disease in the seedling stage, then it should be removed, and then take up the ground, ash is added to it, as well as soda solution, or fine charcoal.

Before planting seeds, it is desirable to initially steam the soil. It is advisable to generally burn diseased plants on the vine so that the infection does not spread to other plants.

When you buy plants, give priority to those seeds that are of domestic origin, they are always more resistant to disease and damage.

To grow beautiful and healthy asters, and enjoy the beauty of their flowering, you need to try and create favorable conditions. It may take a little time to create such conditions, but the result is worth it. Unfortunately, certain factors often prevent plants from growing healthy. They can also cause various diseases. This flower is also not immune from pest damage. The fight against aster diseases and pests, which can include both prevention and treatment, will help save the planting. To save flowers from death, you need to correctly recognize the problem and take action in time.

Astra's main enemies

You can learn about the defeat of the plant by the appearance of the stem, leaves, and sometimes by the flowers themselves. What can indicate the disease:

• plant growth retardation;
• a large number of deformed colors;
• narrow leaves;
• wrinkled or devoid of smoothness leaves;
• discoloration of the stem and leaves;
• the appearance of veins on the leaf plates.

Such changes can be caused by various diseases. It should be noted that asters can infect at least 24 types of different viruses. Although preventive measures (treatment of asters from diseases) can help reduce the likelihood of infection, it is most likely not possible to completely protect the planting from viral diseases. Such diseases can be caused by various factors. One of these is the transmission of viruses by insect vectors. That is why in the garden where it is planned to grow asters, pests and insects should be fought.

If the plant is affected by pests, it will most likely not be possible to save it. The most effective method of pest control is prevention. A plant affected by a pest dies very quickly, because the pests either suck the juice from the flower, or gnaw the roots, or eat the leaves. Under such conditions, a flower cannot exist. If only a few flowers affected by pests appear in the planting, urgent measures should be taken to protect the rest of the flowers. Although damaged asters cannot be saved, it is quite possible to protect the planting as a whole from pests and diseases.

plant pests

Planting asters can be affected by several types of pests. You can determine exactly who is causing the damage either by finding a representative of the pests, or by examining the affected flowers and determining the damage. Who and how strikes asters:

Seeing damage on the plant, you can determine the pest that hit the planting. Because they multiply rapidly, action must be taken decisively. In some cases, manual collection of pests helps.

How can flowers get sick

The list of diseases of perennial and annual asters is very diverse. Most diseases are classified as fungal or viral. They can affect both individual stems and entire plantations. Diseases spread very quickly, so action must be taken quickly and decisively.

To combat aster diseases, it is necessary to know their varieties and visible manifestations. These may be:

What does the fight against diseases and pests of asters include?

To avoid many diseases will help to carry out preventive measures that will prevent the occurrence of problems. Prevention, which can save you from the need to fight diseases and pests of asters, includes:

1. Autumn digging of the soil. Deep loosening of the earth, as well as digging it between shrubs, helps to destroy the habitats of pests and disturb their natural habitat.
2. The right choice of flowers for planting. If it is not possible to look for reasons why asters are dying in the garden, or there is no time to fix problems, it is better to choose varieties that are resistant to diseases and pests for planting.
3. Autumn processing of a bush. It includes the removal and burning of annual shoots and perennial stems dying off for the winter. Such care prolongs the life of shrubs.
4. The correct choice of the density of shrubs when planting. If the planting is too dense, the diseases spread easily, since the wind between the bushes is not enough. If the plants are not planted too tightly, you can save asters from blackleg and other diseases.

And yet, no matter what preventive measures are taken, it is not always possible to save the landing from diseases. Before starting treatment, the disease or pest should be correctly identified. The method of treatment is chosen depending on the problem. Knowing exactly why the asters turn yellow and dry out, you can take timely action to save the landing.

How to treat

Treatment of diseased shrubs takes place in several stages. Their sequence is:

• determination of damage;
• classification of the disease;
• carrying out medical procedures.

There are no general rules for the treatment of asters, it must be selected in accordance with the type of disease. That is why, before starting the procedure, it is necessary to determine exactly why the leaves of the aster curl or other visible damage occurs.

The table below will help you choose the right treatment options.

As can be seen from the information described in this article, prevention is of great importance in the care of asters. Using fungicides, fertilizers and pesticides for asters, you can prevent the emergence of many diseases and the spread of pests. In addition, to prevent the occurrence of any damage to the planting, regular weeding of the site and loosening of the upper layers of the earth are recommended.
When diseases or damage by pests appear, damaged stems and leaves should be removed first. Thus, the rapid spread of the disease can be avoided. Therapeutic measures are prescribed as the type of disease is determined.

Biological preparations for plant protection against diseases and pests - video

We protect asters from diseases and pests. When growing asters, there is a lot of anxiety blackleg, because of which both seedlings and seedlings die.

In those affected by this fungal disease, the base of the stem darkens, thins out, and the plants droop. Places of constrictions rot, and seedlings die within 2-3 days.

The source of infection is contaminated soil. Increased soil moisture and thickened crops contribute to the spread of the disease.

- Methods of protection. It is necessary to sow seeds for seedlings in disinfected soil, after shedding it with a thick solution of potassium permanganate or any fungicide that protects against fungal diseases.

Seedlings should be watered sparingly, only when the topsoil dries up. Regular ventilation also prevents the onset of the disease.

Sick plants should be removed, the soil should be sprinkled with ash, watering should be reduced. With a strong spread of the disease, it is urgent to transplant still healthy plants into fresh soil.

More one of the most harmful ubiquitous fungal diseases of asters is fusarium. Plants are affected in any period of vegetation, but most severely - during budding and at the beginning of flowering.

From the soil, the fungus (causative agent of the disease) penetrates the root system, causes it to rot, then spreads through the vessels of the stem. Starting from the root neck, brown longitudinal stripes form on the stem.

The affected parts of the plant turn brown and dry out, the aster dies. The fungus is introduced into the plant from the soil at temperatures above 20°C (the optimum temperature for its development is 20-27°C).

The appearance of Fusarium is facilitated by the introduction of fresh manure, the formation of a crust on the soil surface, heavy clay and acidic soils, thickened crops and plantings, excessive fertilization, untimely removal of diseased plants.

The disease is very dangerous, it can lead to the death of 40 to 80% of plants. The fungus survives in the soil on plant debris.

- Methods of protection. There are no varieties absolutely protected from Fusarium. There are only more or less stable ones.

Therefore, when growing asters, it is so important to create favorable conditions for it. It is also very important to remove all plant debris in the fall, lime acidic soil, and drain low areas with stagnant water.

When diseased plants appear, they should be immediately removed from the flower garden, and the remaining asters should be watered with foundation.

For irrigation in a bucket of water, you need to dissolve 20 g of the drug, this amount is enough to treat 1m2 of the soil surface. Processing should be carried out at least 5 times with an interval of 10 days.

Another disease - brown leaf spot or septoria- greatly spoils the appearance of asters. During budding, light brown spots of various shapes appear on the lower leaves. They grow, and all the leaves of the bush are affected. During flowering, the foliage dries out.

Asters are more often affected by brown spotting in years with warm, humid summers. At risk are weakened, poorly maintained plants, densely planted, overfed with nitrogen fertilizer. The infection persists in the soil on plant debris.

- Methods of protection. When a disease occurs, plants should be sprayed 2-3 times with an interval of 10-14 days, dissolving a copper-containing preparation in 10 liters of water: Bordeaux mixture (100 g) or copper oxychloride (50 g).

Fungal disease gray rot affects many plants, and asters suffer from it. Leaves, stems, flowers are affected. The rot of stems and tops of young shoots is especially dangerous. The stem and leaves turn brown, the tissues soften, rot.

The time of appearance of the disease and its harmfulness depend on weather conditions: in rainy cool weather, the disease progresses, in warm and dry weather it does not.

- Methods of protection. The same as with brown spotting.

Annoy asters and diseases caused by bacteria. When affected by bacterial spotting, brown oily spots up to 2 cm in diameter form on the underside of leaves, on stems and buds.

Later, the same spots appear on the upper side of the leaves, merge and cover most of the leaf. The disease begins during the budding period and progresses during flowering, and the seeds become infected. The bacterium overwinters in the soil on plant debris and in seeds.

- Methods of protection. In autumn, you should dig the soil with the turnover of the layer. Seeds should be collected only from healthy plants. When a disease appears, it is necessary to spray the plants with a 1% Bordeaux mixture or 0.5% copper oxychloride. Processing should be carried out 2-3 times in 10-12 days.

Cucumber mosaic virus aster can be infected by harmful insects - leafhoppers, aphids. In young plants affected by the mosaic, the leaves are small, deformed, with light veins. Later, the entire leaf blade brightens.

The main stem has shortened internodes and the plants do not flower. On asters affected by the disease in a later period of development, the inflorescences grow ugly, often one-sided. The causative agent of the disease persists in the rhizomes of many cultivated plants and weeds.

- Methods of protection. It is impossible to save asters from the mosaic, therefore, at the first sign of the disease, the affected plants should be destroyed. And, of course, you need to deal with pests that carry the mosaic virus from one plant to another.

The most harmful aster aphid. It reproduces especially actively in hot and dry times, forming entire colonies on leaves and stems. It feeds on plant sap.

The growth of the damaged bush is weakened, the shoots are deformed, the flower petals are twisted, discolored and very often dry out.

- Means of protection. To get rid of this pest, you can use a decoction of stepsons of tomatoes. 4 kg of green mass is poured into a bucket, poured to the top with water, boiled over low heat for 30 minutes and filtered.

They take 3 liters of broth, add water to 10 liters, add 40 g of crushed laundry soap and spray asters.

With a large number of aphids, you will have to use chemicals, for example, Inta-vir (1 tablet per 10 liters of water).

Nina Ippolitova, Ph.D. Sciences

In order to grow healthy and beautiful flowers, it is important to follow all the recommendations on their agricultural technology, that is, to observe crop rotation, sowing dates and plantings; do not thicken crops; observe the norms and terms of watering, doses and terms of fertilization. It is important to destroy weeds in a timely manner, to identify damaged and diseased plants. But if pests or diseases nevertheless appear, plantings should be treated with special preparations, and it is better to use environmentally friendly infusions and decoctions from insecticide plants in personal plots. Amateur flower growers should not abandon mechanical control measures: the collection and destruction of pests, the installation of traps for bears and wireworms.

Diseases of asters

In recent years, seed and planting material has been imported from abroad, and this increases the possibility of the spread of pathogenic organisms, including those that previously did not cause significant damage under local conditions. Plants suffer from a large number of viral diseases. Astra can be affected by 24 viruses. In most cases, signs of the disease appear on the leaves, often on flowers, resulting in reduced product quality. The leaves become mosaic, wrinkled, narrow. Growth is inhibited, in some varieties the flowers are deformed. For the prevention of viral infection, healthy seed and planting material should be used, resistant varieties should be grown, constant monitoring of the condition of ornamental plants should be carried out, specimens with visible symptoms of a viral infection should be carefully culled and destroyed, insect vectors should be regularly controlled, weeds - virus reservoirs should be destroyed, observe spatial isolation.

The most dangerous for annual asters are fusarium (fusarium wilt) and jaundice (mosaic disease).

Fusarium, or Fusarium wilt, - the most dangerous disease of asters, which is caused by the Fusarium fungus, which persists in the soil in the form of thick-walled resting spores for a very long time, more than one year. Infection of plants occurs through the soil. The fungus penetrates through the roots and spreads through the vascular system of the plant, clogging it. Withering is more often manifested in the phase of budding and flowering. Young plants are extremely rarely affected by Fusarium, only under very favorable conditions for the development of the disease. In the first stage of the development of the disease, the leaves turn slightly yellow, then turn brown, curl and fade. Oblong brown spots appear on the stems, and longitudinal dark stripes appear at the root neck and above it. Sometimes the tissues of the stem in these places are torn, forming cracks. Asters become oppressed, stop growing and quickly wither. Often in diseased plants, mycelium raids or sporulation of the fungus appear in the form of pinkish pads in the lower part of the stem. A characteristic feature of Fusarium is the asymmetry of the lesion: dark stripes on the stem and wilted leaves are observed on one side of the plant. This makes it easy to distinguish Fusarium from other diseases. On dying plants at the root neck, and with strong humidity and elevated temperature, a pink coating forms on the whole plant - sporulation of the fungus. The causative agent of Fusarium in asters is characterized by a "narrow specialization": it affects only annual asters, without spreading to other plants. Therefore, in the agricultural technology of asters, crop rotation is of exceptionally great importance. Fusarium spreads strongly in: high humidity of air and soil at a temperature of 12 to 32 ° C. The optimum temperature for the development of the fungus is 20-27 °C. At temperatures below 12 ° C and above 32 ° C, the development of fusarium stops. External signs of the disease may be. until there are favorable conditions for its development. The pear varieties Strausovo Pero, Rose-shaped, Triumph, Unicum, some varieties of the American Beauty group, etc. are strongly affected by Fusarium.

Control measures: correct alternation of crops in crop rotation; the return of the aster to its original place in 4-5 years; adding lime to the soil to neutralize acidity (norm 30-50 g / mg); dressing the seeds before the sowing solution of foundationazole (0.2%), topsin (0.1%) for 30 minutes; steaming the soil before sowing seeds or dressing with solutions of bazdan (0.2-0.4%), ditan M-45<0,2-0,4 %); после высадки в грунт систематическое (через 10-12 дней) опрыскивание раствором хлорокиси меди (0,5 %); удаление больных растений с участка и последующая посыпка почвы негашеной известью.

Blackleg - a fungal disease that often affects asters. First, seedlings and seedlings turn black, then the root neck and the base of the stem rot. As a result, the stem is driven away, the plants lie down and subsequently die; The causative agent hibernates in the soil, it develops especially strongly on acidic soils.

Control measures: early picking seedlings; removal of diseased plants; soil disinfection 0.5-1% dissolved potassium permanganate (50-100 g per 10 l of water), solution consumption 6-12 l/m2; sprinkling the soil around the plants with sand, and if necessary, before planting, go picking and replacing it; disinfection with a solution of bleach or copper sulphate (respectively 550 or 100 gyu per 10 liters of water) boxes, pots, greenhouses (frames and walls).

To destroy mushrooms, you can pour the kidney with onion infusion (20 g of onion scales are poured into 1 liter of water, insisted for a day, filtered and sprayed 2-3 times after 6 days).

rust asters . The development of rust occurs on pine (various species) and asters. In June-July, in sick asters, pustules (swellings) appear on the underside of the leaves, filled with spores of summer fruiting. With the development of the disease, the leaves gradually fade and dry out. By autumn, the organs of winter fruiting develop on them - flat orange pads covered with epidermis and filled with brown spores. Winter spores overwinter; and sprout in the spring. In the spring, the spring stage of the fungus forms on the needles. In June, whitish bubbles appear on the needles, filled with light orange spores. Spores are easily carried by the wind, sometimes over a long distance, and, falling on the leaves of asters, continue their development.

control measures, landing of asters at a distance of at least 250-300 m from pine plantations; preventive spraying of asters with a 1% solution of Bordeaux liquid, or a mixture of ground 1 sulfur with lime (1: 1) at an air temperature of at least 18-20 ° C; when rust appears, spraying with Bordeaux liquid every 7-10 days.

Jaundice asters - a disease caused by a virus transmitted by leafhoppers and aphids.

At the beginning of the disease, the leaf blade brightens, mainly along the veins, and then general chlorosis of the leaf occurs. Growth suppression and increased tillering of diseased plants are observed. The buds stop growing, turn green.

In addition to asters, the jaundice virus infects dandelion, tagetes, zinnia, marigolds and a number of other crops.

Control measures: destruction of vectors of infection (aphids and cicadas); spraying the plant with solutions of actellik (0.1%) pyrimsf (0.1%), intavir or pyrethrum (2%>, yarrow (8%) with the addition of 0.2% soap solution to them; burning plants affected by the virus.

Against aphids, thrips use infusion and decoction of yarrow. To prepare the infusion, 800 g of dry chopped stems and leaves are poured with boiling water, washed down with 10 liters of water and infused for 36-48 hours. To prepare a decoction, 800 g of dry chopped leaves are poured into 10 liters of hot water, boiled for 2 hours, then topped up; up to 10 l, filter, cool and use

Aster pests

Pests cause asters a wide variety of damage: they suck out juices, gnaw stems and roots, eat leaves, which leads to illness and death of plants. - In the fight against it is necessary to create such conditions that exclude their mass appearance. To do this, it is necessary to carry out "Preventive measures, which include:

• thorough autumn digging and plowing the soil in recession deep loosening of plantations, digging, soil between shrubs, as many pests hibernate in the soil in the form of larvae, pupae, testicles;
• removal and burning in autumn of all annual plants and shoots of perennials dying for the winter, weeding and destruction of high-quality (plant residues serve as a place for overwintering pests and a breeding ground for diseases);
• selection for planting varieties resistant to diseases and pests;
• liming of soils, the introduction of humus, compost on heavy soils, which improves their quality and creates favorable conditions for the development of plants;
• proper planting of plants: if planted too densely, plants stretch out, weaken, their ventilation worsens, which leads to the appearance of pests and the development of diseases;
• in the event of the appearance of pests and diseases, the use of pesticides, the collection of pests and their destruction.

Farmed slug. Eats leaves, sometimes damages buds. Slug damage can be easily recognized by the oblong holes and slimy secretions that remain on plant parts. Slugs breed in large numbers in wet years.

Control measures: autumn plowing of areas for asters; destruction of weeds; sprinkling with superphosphate or lime along the boundaries of the plots and dispersion of chemicals in the aisles.

Earwig ordinary. The body of the earwig is pitch-brown, up to 2 cm long. Harm is caused by an adult insect from the second half of June until the end of the growing season. The earwig damages the leaves, buds and inflorescences of asters, leaving jagged bits of plant parts.

Control measures: dusting of asters with pyrethrum, foundationazole; manual collection and destruction of earwigs.

Sunflower moth (aster blizzard). Butterfly small, up to 20-25 mm in wingspan. The forewings are gray with variegated dots in the middle, somewhat elongated. Hindwings light, with dark veins. Caterpillars are light gray or gray in color, with three longitudinal stripes on the back. The length of an adult caterpillar is from 9 to 15 mm. The flight of butterflies begins in the second half of summer and coincides with the flowering of asters. Butterflies lay their eggs on the anthers of flowers. Caterpillars at the beginning of their development feed on pollen and flower petals, and then damage the achenes of asters in flower baskets. The adult caterpillar descends to the ground, where it pupates. Caterpillars overwinter in a cocoon.

Control measures: planting asters at least 300-500 m from the sunflower crop; preplant tillage with bazudin at the rate of 30-40 t/m2; destruction of weeds from the Compositae family; manual collection and destruction of aster blizzard caterpillars.

Drooling penny. Yellowish-green larvae live in foamy (similar to saliva) secretions, in the axils of leaves and shoots. It harms from May until the end of June. The larvae damage the leaves and ^ stems of asters, which are deformed. Small yellowish spots appear on the leaves, the abundance of flowering decreases.

Control measures: treatment of plants with a solution of karbofos (0.2%) |. or antio, infusion or decoction of tobacco (4%) (using a 0.4% solution of soap).

Tobacco infusion is used against ticks, aphids, young caterpillars. To do this, dry tobacco or shag is poured with water and infused for 4 hours.

A decoction of tobacco is prepared as follows: 400 g of dry tobacco is poured into 10 liters of water and boiled for 2 hours. After boiling, the decoction is not strained, and the volume of water is adjusted to 10 liters. To keep the liquid on the surface of the plants, laundry soap dissolved in water is added to it before spraying.

Meadow clone. The body of the meadow bug is elongated, from 5 to 10 mm long, yellowish in color, the wings are tightly pressed to the back. The bug damages shoots, leaves, buds and flowers by sucking. of which are juices. Numerous whitish dots appear on the leaves. The leaves are curled, and the buds are deformed.

With severe damage, the plants partially or completely wither.

It harms from the second half of June during the entire growing season. Widespread in dry years.

Control measures: compliance with crop rotation, spraying plants with a solution of karbofos (0.2%), dusting with pyrethrum or phosphamide (0.2%).

spider mite has a small body size (0.4-0.5 mm). ^ Body color changes: orange-yellow or reddish in early spring and autumn, greenish-yellow in summer. Settles on the underside of the leaves. Damages the leaves of asters, sucking juices out of them. From damage, the leaves turn yellow, turn brown and wither. Harmful throughout the growing season. It multiplies especially quickly in dry and hot weather.

Control measures: weed control around the aster plantation; in dry and hot weather (20 "C and above), dusting ground in a mixture with lime (1: 1), spraying with a solution of karbofos (0.2%), pyrethrum solution (2%), tobacco infusion with the addition of 0.4% are effective soap solution), common yarrow (8%, with the addition of 0.2% soap solution), garlic (1%) and onion (2%).

Onion infusion is prepared like this; 90-100 g of grated onions are poured into 3 liters of water, kept for 5-7 hours in a sealed container, after which the liquid is filtered and another 7 liters of water are added. For a better effect, 40-50 g of liquid soap is added to each liter of solution.

On the day of preparation of garlic infusion, 200-300 g of unpeeled cloves are passed through a meat grinder, poured into 10 liters of water and taken out for 1 day.

When pollinating or spraying, it is necessary that the chemicals fall mainly on the underside of the leaves.

Scoop-gamma- a butterfly of medium size, dark brown or grayish with a light badge on the wings in the form of the Greek letter gamma. Scoop-gamma has several generations. It causes the greatest harm in the spring, when the first generation appears. In the second half of summer it is less dangerous.

The scoop caterpillar is green, up to 32 mm long. There are 8 light lines running along the back. Caterpillars damage the aerial parts of plants, hibernate in the soil.

Control measures: deep autumn plowing; destruction of weeds and plant residues; spraying with a solution of chlorophos (0.2%), karbofos or phosphamide

The word "aster" in literal translation from Greek means "star". This name of the flower is associated with an amazing ancient legend. The constellation Virgo was associated by the Greeks with Aphrodite. Once the goddess of love, when she looked at the earth, shed a tear. From this cosmic dust a beautiful flower appeared. People called him "aster". Since then, the amazing plant has come to personify love. Today, people rarely think about how a flower appeared, but its exquisite beauty is appreciated. This is one of the gardeners' favorite plants. But, unfortunately, a beautiful view of a flower can spoil the disease. Asters need protection, which will protect them from adversity.

a brief description of

The annual aster strikes with an amazing variety. Breeders bred a huge number of varieties. They are surprisingly different in their color and shape. A beautiful plant is able to please with needle, terry, pompon, peony inflorescences of bright saturated colors.

The plant is planted in flower beds, they are decorated with borders, balconies. After all, it blooms in July and continues to be beautiful until late autumn. The plant is quite unpretentious. But some factors can provoke aster disease.

Consider what misfortunes are most often subjected to a beautiful flower.

Fusarium wilt

This is the most common aster disease. The photo shows how the plant dies. It can be affected at any time during the growing season. But this process is most pronounced during the beginning of flowering.

Brown streaks appear on the affected area of ​​the stem. It can change color even the entire stem. The leaves, being exposed to the disease, sag and become brown.

Infection of flowers occurs through the soil. This is facilitated by factors that weaken the root:

• clayey heavy soils;
• introduction of fresh manure into the soil;
• insufficient or excessive moisture;
• crust formation.

How to deal with fusarium?

Aster diseases and the fight against them is a topical issue that worries gardeners.

1. Before sowing, the seeds must be soaked for 15-18 hours in a solution of micronutrient fertilizers (magnesium sulfate 0.05% or cobalt chloride 0.03%) for prevention purposes.
2. The soil mixture is watered with diluted manganese (1.5 g per 10 liters of water). Seeds are covered with dry sand.
3. Asters affected by the disease must be removed immediately.

Septoria or brown spot

Light brown spots appear on the leaves of the lower tier. This is a rather unpleasant aster disease. Over time, the spots acquire a gray tint. Pycnidia of the fungus are visible on top of the leaf.

During flowering, the leaves begin to dry out. The plant loses its decorative effect.

Pycnidia are able to overwinter on plant debris. The disease spreads by seeds that were collected from the affected flower.

Fighting methods

Gardeners carefully studied the diseases of asters and the fight against them. Experienced professionals suggest resorting to the following procedures:

1. As soon as such an aster disease was noticed, it is necessary to immediately spray the plant with Bordeaux liquid (1%), copper oxychloride (0.5%).
2. It is necessary to perform 2-3 such procedures. The interval between spraying should be 10-14 days.

Aphid Helichrysalis

Such a lesion disfigures the aster leaves and germ buds. Even flower stalks can suffer. But it is possible to notice aphids only when the leaf opens.

The pest overwinters inside the bud on plum branches. Initially, several generations of wingless aphids hatch and develop. And only by the end of June a pest appears that can fly to composite plants. Chrysanthemums, asters, and sunflowers suffer from winged aphids. It is on these crops that the pest begins to multiply rapidly.

In autumn, the aphid returns to the plum. She lays her eggs on the branches of trees. Only they survive the winter.

How to deal with aphids?

It is important to pay attention to the condition of the plant in a timely manner. If mutilated leaves or buds are noticed, control measures must be taken immediately:

1. Initially, you should make sure that it was the aphid that hit the plant. To do this, carefully expand the kidney.
2. An excellent "weapon" against aphids is a systemic insecticide.
3. A favorable result will be provided by spraying with karbofos, depis, chlorophos or Inta-Vir. This procedure should be done in early spring. It is best to spray the plant at the moment when no more than 4 true leaves appear on the aster.

Gray rot

Any diseases of the annual aster lead to the loss of the original beautiful appearance of the flower. Gray rot is no exception. It affects leaves, stem, inflorescences. The disease is especially dangerous for young shoots.

The leaves and stem at the site of the lesion become brown in color. Tissue softening occurs. Damaged areas begin to rot. In these zones, a fluffy gray coating of mushroom mycelium is formed. The rapid growth of the disease is observed in cool rainy weather.

Diseases and pests of the annual aster can very quickly destroy a beautiful plant. The same solutions that are used for septoria allow you to get rid of gray rot.

Bacterial spotting

On the leaves, yellow spots are formed if such an aster disease occurs. How to deal with such a scourge?

First, let's look at how the disease manifests itself. The lower leaves of the plant acquire autumn color. They begin to turn yellow or blush. Then they dry quickly. However, similar symptoms are characteristic of many diseases. Therefore, to determine the bacterial spot, it is necessary to conduct a laboratory analysis.

The attack spreads rapidly during wet weather or as a result of frequent watering. Since a humid environment accelerates the spread and penetration of the pathogen through wounds and stomatal crevices.

The causative agent of the disease is able to hibernate in the affected areas. Therefore, aster can be propagated only from a healthy plant. In addition, when growing asters, it is necessary to adhere to strict hygiene.

Allows you to get acquainted with what such an aster disease looks like, a photo posted in the article.

Methods for dealing with spotting

To get rid of the disease, the following measures are taken:

1. It is necessary to provide the leaves with a dry environment. To do this, it is necessary to refuse for a while from sprinkling spraying.
2. For preventive purposes, it is recommended to treat the aster with copper sulphate. Spraying is done once every three weeks. This procedure must be repeated several times. At the same time, not only the plant itself is sprayed, but also the soil.
3. In the event of a disease, it is recommended to treat the plant with Bordeaux liquid (1%), as well as copper oxychloride (0.5%). The procedure must be repeated 2-3 times. The interval between spraying should be 10-12 days.

If you want an amazing flower to please you with its beautiful flowering, provide it with the necessary conditions:

1. Astra annual does not like shade, as well as excess moisture. Therefore, choose a sunny open place for her.
2. Astra thrives best in fertile, acid-neutral soil.
3. It is not recommended to feed the plant with organic fertilizers. Especially detrimental to the condition of the asters will affect the introduction of fresh manure. You can feed the culture with rotted compost or mineral complex fertilizer.

If you provide the plant with the necessary care, a beautiful flower will thank you with magnificent flowering, which will last until late autumn.