Scab pear treatment. Scab on a pear: causes, prevention from the disease, methods of struggle

Scab of an apple tree - fungal disease. It is important not to let it develop and start take action as soon as scab appears on the apple tree. How to deal with it? Let's talk about this further.

As a result of inaction, by autumn, instead of beautiful, juicy and delicious apples small, deformed fruits will hang on the tree, which are not stored for a long time and have an unpleasant taste.

One of the most serious tasks of a gardener is how to save an apple tree from scab.

Scab is a disease in which young shoots, leaves, fruit stalks and apples become strewn with rounded dry spots of small size.

Such damage is caused by the spores of the marsupial fungus. Spores hibernate on fallen leaves and crumbling damaged fruits. Some of the spores persist in cracks in the bark and on dry old branches.

Favorable conditions for the onset of the development of the disease are cool and humid weather..

Awakening dispute begins then when the shoots start to grow on the apple tree and young leaves bloom. The spores are attached to the surface of the leaf, but do not penetrate inside.

Leaves at the tops of branches are damaged first.. It is easy to recognize the disease - the leaf is covered with light green spots. After a while, the spots turn brown and begin to crack.

Whether it is scab on an apple tree or a pear tree, the control measures for fruit trees will be the same.

The activity of the pathogen increases when the air temperature reaches + 20 °, it often rains or fogs rise. After 15 - 20 days, the disease passes to the ovaries of fruits, petioles and branches.

When damaged by scab, the fungus does not penetrate deep into the plant., photosynthesis is not disturbed, the tree continues to grow and set fruits.

With scab, the fruits are deformed.

But if the action of the fungus is not stopped at an early stage of development, then the fruits become small, deformed, lose their taste and stop accumulating vitamins and nutrients.

Across sores and cracks, the apple tree becomes vulnerable to other fungal and bacterial diseases.

In a diseased foliage begins to fall off ahead of time, most of the apples crumble at an early stage of development. An urgent need to develop an action plan on how to get rid of scab on apple trees.

Scab treatment on an apple tree

If a scab appeared on an apple tree, how to treat it - we will consider this important issue for the gardener later in the article. The fight starts with prevention. When laying a new garden, it is important:

Further, spend in the garden agrotechnical measures , which reduce the likelihood of infection of apple trees with scab:

• in autumn, all fallen leaves and damaged fruits are collected from under apple trees and burned. In some cases, instead of harvesting plant debris, deep digging of the soil can be carried out.

ATTENTION! Digging is effective only if scab infestation has not been observed or has been suspended in the current year. Otherwise, when digging in the next season, layers of earth with infected foliage may again be on the surface, which increases the likelihood of disease.

Apple tree nutrition.

Measures to combat scab on an apple tree also include proper care:

• Crown thinning not only prevent scab, but also increase yield;
• and the ground in tree trunks with fungicides. The use of pesticides, their concentration directly depends on the growing season. Chemicals are not removed from the fruit for a long time, this should be taken into account during processing. After the last treatment, at least a month must pass before you start eating the crop;
• Foliar apple trees mineral fertilizers has a positive effect on productivity and destroys fungal spores.

Chemicals

In deciding how to cure an apple tree from scab, the dominant place is occupied by chemicals. These pesticides for scab control are toxic, so they are applied after the entire crop has been harvested.

If you are solving the problem of how to treat an apple tree for scab, it is important not to miss the moment of processing:

• leaves must fall, but at the same time the air temperature should not fall below + 5 °, otherwise the active substances will not work.
• The weather must be dry. If after treatment with chemicals it rained, then spraying will have to be repeated.

The whole apple tree, processing the trunk, skeletal branches and shoots.

Fungal spores are microscopic, they can hide in cracks in the bark and near the kidneys.

When is an apple tree treated for scab , except for the apple tree itself, tillage is carried out.

Possible options for dealing with apple scab in the fall are processing:

• Nitrafen, diluted 100 g per 10 liters of water;
• 3% Bordeaux mixture- copper sulfate 300 grams, lime 400 grams, water 10 liters.

Important! If these means are processed when the apple trees have not yet shed their leaves, then the burn of the green parts of the tree is inevitable.

If the scab is on the apple tree, what should I do in this case? Effective treatment with microelement solutions:

• Urea (urea)- prepare a 10% solution, for this, 100 grams of fertilizer is diluted in 10 liters of water. You can not wait for all the foliage to fall, but you need to process the entire apple tree and crumbled foliage under it. If the infection was strong, then the destruction of the spores must be carried out twice with an interval of 10 days;
• Ammonium nitrate- strengthens the immunity of the apple tree, does not allow spores of the fungus to gain a foothold on the foliage. Prepare a 10% solution. Ammonium nitrate is equivalent to urea;
• Potassium chloride- from the scab, a 7% solution is used. In addition to the destruction of the causative agent of the disease, it strengthens the plant and improves the yield for the next year.

Mandatory fertilization.

Folk remedies for apple scab

Folk remedies in the fight against scab safer than chemical pesticides but less effective. Their application should be methodical and regular. Only then can scab disease be minimized.

If scab appeared on an apple tree during fruiting, how to deal with it? Here only folk remedies, because toxic chemicals should not be used during this period.

• Foliage under apple trees is not collected, but dig so that it is at a depth of 10 cm.
• The trunk circle is mulched with sawdust and spilled with Baikal EM-1 fertilizer.
• Fertilizer is used when the air temperature has not yet dropped to + 10 °.
• In the spring, re-digging is not carried out, but watered with this fertilizer again. The microorganisms contained in the fertilizer will accelerate the decay of the affected foliage and improve the composition of the soil.

Mulching apple trees.

• They carry out sanitary, cutting out all broken and diseased branches.
• They clean the exfoliating bark on the trunks, lichens and mosses.
• trees are carried out to the height of a raised hand, carefully all skeletal branches, forks and cuts. Best to use garden paint because it contains substances from many diseases and pests.

From scab, spraying apple trees with saline helps. 0.5 kg of salt is diluted in 10 liters of water. Processing is carried out after leaf fall.

IMPORTANT: Salt solution should not be used frequently, because it can cause salinization of the soil.

If the treatment is transferred to the spring, then this must be done before bud break.

Disinfect soil and bark in autumn on apple trees you can use a bright pink solution of potassium permanganate.

spring the solution is made weaker so as not to burn the young foliage.

This method can be used up to three times.

Prevention in the spring

If there is already a scab on the apple tree, the treatment is carried out in the fall (we described it), but preventive measures begin before the buds open on the apple tree in the spring.

Bordeaux mixture processed twice:

• Until the buds open, when the air temperature stops dropping below + 5 °;
• After the apple trees bloom.

For the first treatment, a 3% mixture is prepared, and after the leaves open, only 1% is prepared to prevent burns.

dry mustard dissolved in a small amount of water and poured into a bucket of water. All you need is 4 tablespoons of mustard powder.

It is best to spray immediately after rain, the solution adheres better to wet branches.

Processing time - mid or end of May. At the beginning of summer, re-treatment is carried out.

Used for prevention fresh horsetail. The bucket is filled with grass ¼, poured hot water and insist 3 days. Before processing, filter and add water to 10 liters. This prophylactic method can be applied several times per growing season, at intervals of 2-3 weeks.

Increase immunity in apple trees, increase resistance not only to scab disease, but also to other diseases such means as "Epin" and "Zircon".

Application of fungicides

If the weather contributes to the rapid development of the disease, then to save appearance And palatability apples will have to apply fungicides.

They must be used strictly according to the instructions. and taking into account the withdrawal period chemical substances from a plant.

• "Horus" - 3rd class of danger. It is used both for the treatment of scab and for protection against it. Can be used at temperatures from +3°. If the air is heated to + 25 ° and above, the effect of the drug is reduced. Effective only on young trees.
• "Gamair" - hazard class 4, can be processed with an interval of 7-10 days, does not accumulate in fruits;
• "Fitolavin" - hazard class 3, acts quickly, penetrates deep into the tissues of the plant, can be addictive, so apply once;
• "Strobe" - hazard class 3, it is not washed off by rain, its action is not affected by air temperature, it is used no more than 3 times per season;
• "Skor" - hazard class 3, acts 2 hours after treatment, long-term effect on fungal spores, re-treatment after 2 weeks. Sprayed before flowering, in the phase of a pink bud, after shedding the petals;
• "Rayok" - hazard class 3, quickly penetrates deep into the plant, after 2.5 hours is resistant to rain, is used both for prevention and for the destruction of fungal spores. Should be alternated with fungicides with another chemical composition. The analogue of this tool is "Skor".
• "Abiga-peak" - hazard class 3, releases copper in an active form, prevents scab spores from penetrating deep, blocks oxygen from spores.

The use of iron sulphate

Iron vitriol to combat scab.

From scab on apple trees, iron sulfate helps.

It has low toxicity to humans. To combat scab, it is used in the fall after the leaves fall or in the spring before bud break.

For autumn application prepare a 7% solution: 700 grams of iron sulfate is diluted in 10 liters of water.

In the spring, you can apply a 1% mixture, for this: 100 grams of powder are dissolved in a 10 liter bucket.

Important! Do not use a metal bucket.

Foliar treatment not only destroys fungal spores, but also improves the fruiting of old apple trees.

Features of the struggle at different times of the year

If scab is a frequent occurrence in your garden, then the fight and prevention should be carried out throughout the growing season - from early spring to late autumn.

First treatment in spring carried out when the air temperature is above + 5 ° -10 °.

Chemical treatment is important to carry out before the appearance of leaves.

At the same time, it is important to monitor the humidity of the air. The more often it rains, the shorter the incubation period for the scab pathogen, the earlier you need to start taking action.

IMPORTANT: processing of apple trees can not be carried out during the flowering period.

How to deal with scab on an apple tree in August?

Summer processing also depends on the weather. In dry hot weather, the disease stops. You should follow the weather forecast, because with the first rains the disease will resume.

Summer processing is carried out only in the early morning or evening. Spraying during the daytime in bright sun causes leaf burn.

In the heat, the agent quickly evaporates from the surface of the apple tree, the active substance does not have time to be absorbed and the treatment does not bring the desired results.

When the scab is on the apple tree, how to fight in the fall? Processing not carried out until the harvest. Most fungicides have a long decay time, and chemical compounds are not removed from fruits within 20-30 days. These apples should not be eaten.

Scab control is best done after the leaves have fallen.

The photo below shows apple scab on leaves and fruits. Treatment is detailed in the article above.

Scab control is carried out after harvest.

How to treat during fruiting?

During the fruiting period, folk remedies or preparations of biological origin belonging to hazard class 4 should be used to combat scab.

They are non-toxic to humans, bees, insects and fish in nearby waters. In addition to fighting scab, these drugs heal the soil, increase immunity in apple trees, and promote rapid growth and development of fruits.

10 - 15 days before harvest should not be processed by any means.. The fungus has already damaged the fruits, so nothing can be changed a few days before picking apples. The fight against fungal spores is carried out after the removal of the fruit.

Scab control

On some varieties of apple trees

Among the variety of varieties of apple trees the least resistant to scab disease are Melba and Golden Chinese.

When landing in Melba's garden should allocate a place for her on a hill well lit by the sun. With excessive moisture, scab damages the tree instantly, so prevention is a prerequisite for growing this variety.

Treatment as a preventive measure is carried out three times per season.:

• At the time of leaf blooming;
• After flowering;
• 20 days after the second treatment, when fruits are set.

The same can be said about the variety Golden Chinese. Only timely preventive measures will help this variety cope with the disease.

In different regions

The terms of processing apple trees from scab depend on the region. Thus, in middle lane the first treatment is carried out in late April or early May, in Ukraine or Crimea - in mid-April.

Time of processing depends on the stage of development of the apple tree. In any case, the first spraying is carried out when the buds burst and the tips of green leaves appear.

This stage is called the phase green cone. It was during this period that the active spread of scab spores began.

Phase green cone.

In the middle lane, spraying is carried out a second time when the young leaves bloom completely, after 15 days - the third time, after 10 days - the fourth.

In Ukraine and Crimea, three treatments are enough. The second is carried out in the rosebud phase, and the third - two weeks after it.

Whether it is still necessary to carry out spraying is determined by the results of observing the apple trees and depending on the frequency of rains.

Conclusion

The main fight against scab is carried out in the fall. Cleaning fallen leaves, damaged fruits, hygienic pruning of the crown and processing of trunks - by performing these agricultural practices, scab disease can be minimized.

Before fruit set preparations containing copper are effective. They destroy the bulk of fungal spores.

For the complete destruction of the scab, the treatment is carried out up to four times with an interval of 10-15 days..

Useful videos

See an expert review of what scab is:

See information from an expert on how to deal with scab:

Watch a video analysis from gardeners on the effectiveness of scab treatments:

Watch the video on how to make Bordeaux liquid:

As a preventive measure, it is desirable to use folk remedies or biological products that are not toxic to either humans or beneficial insects.

In contact with

Scab pathogens are found on pears and apple trees. Scab on a pear appears during the blooming of buds on it. This is much earlier than on the apple tree. But the methods of dealing with the disease are the same.

Scab on a pear appears during the blooming of buds on it

Why does scab appear on pears and apple trees?

Scab is fungal disease and it is not so easy to deal with it, but it is possible. Usually, it actively develops on apple and pear trees during rainy and cool summers. With heat and dryness, the disease may not occur. The percentage of tree infection depends on what moisture and air temperature. It is important to understand that humidity can be created not only by rainy weather, but also dew at night. Therefore, sometimes a fungus can appear on fruit trees even in hot summers.

Definition of the disease by the first signs

You can find out if there is a scab on an apple or pear tree by examining their leaves. If they have black velvety spots on them, this is a sign of illness. In the early stages of infection, blurry chlorotic spots are visible on the leaves of apple and pear trees. The infection begins to destroy plant tissue. After a few days, the spots become darker and a velvet coating is clearly visible on them. If you do not take any measures, the fungus will develop throughout the crown.

Preventive measures for the spread of scab

To prevent the appearance of scab, you need to do the following measures:

• The crown of an apple tree and a pear should be illuminated by the sun. In wet weather, it is good when the crown is blown by the wind. So moisture dries faster on it. For this purpose, every year it is necessary to cut the crown.
• Fallen Infected autumn leaves, are the main source of scab spread in spring. To prevent this from happening, it is necessary to collect the leaves in the fall, bury them in the ground and dig the aisles. Since the pear scab appears earlier, it is necessary to destroy not only the infected leaves, but also the diseased shoots on it.
• Infected leaves can not be dropped, but destroyed by spraying with urea (7% - per 10 liters of water, 700 grams of urea). Urea helps well in the fight against scab, killing the infection.
• In order to prevent the occurrence of scab on apple and pear trees, it is useful to treat them with Agate - 25 K (dilute three grams of the drug in 10 liters of water). This procedure is carried out at the time of bud break. It is important to know that the buds open within 2-3 days, so you need to prepare for it in advance.

Barely noticeable blurry chlorotic spots appear on pear leaves.

Scab treatment

In the initial stages of the disease, you can get by with Agate 25K or Zircon. Bordeaux mixture is most often used in the treatment of apple and pear scab, which retains its properties for fourteen days. During the growing season, 6-7 treatments are carried out in the following sequence:

1. The first time the tree is treated just before bud break. To do this, mix 300 grams of copper sulfate and 350 grams of lime in ten liters of water.
2. Subsequent times, the diseased tree is treated every fourteen days with a weaker concentration (100 grams of vitriol and the same amount of lime are diluted in 10 liters of water).

In the absence of Bordeaux mixture, it can be changed to another preparation containing copper.

Effectiveness was shown by drugs of systemic action:

• The drug Skor is able to maintain its property for 20 days. Treatment with Skor is carried out only twice. The first time before the flowering of the tree and the second time 14 days after flowering.
• Strobes are used to control scab on apple and pear trees, as well as against powdery mildew. During summer period do no more than three treatments with Strobe with an interval of two weeks. The drug remains active for 35 days. It is allowed to combine Strobi with other fungicides.
• Horus differs in that it remains effective at temperatures down to -10 degrees below zero, remains on the tree even after rain. The drug is treated twice a season. The first time at the time of bud break, the second time - at the end of the flowering of the tree.

In order to treat scab, mineral fertilizers with different concentrations are effective:

• Ammonium nitrate (10%);
• Ammonium sulfate (10%);
• Potassium chloride (from 3 to 10% concentration);
• Potassium sulfate (3 - 10%);
• Potassium nitrate (5 - 15%);
• Potassium salt (5 - 10%).

An integrated method for the destruction of scab is the most effective. Conducted from this way:

1. In autumn, trees are treated with a solution of mineral fertilizer. It is important to know that the air temperature during processing should not be below four degrees Celsius. In addition to treatment and prevention of diseases, the yield of fruitful trees will increase.
2. In the spring, the tree is treated with Bordeaux liquid before it blooms. Be sure to process near-stem circles. If there is no Bordeaux liquid, use another drug with copper.
3. After the flowering period is carried out by spraying with one of the fungicides.

When buying apple or pear seedlings, it is better to choose varieties that are resistant to Porsche.

It looks like a pear affected by scab.

Unlike apple scab, pear infection can overwinter not only in fallen leaves, but also on affected shoots. Infection begins even when the buds open. Therefore, scab appears on a pear in spring earlier than on an apple tree.
But the methods of dealing with these diseases are the same.

What contributes to the development of scab on apple and pear trees

The development of the disease is always favored by cold, rainy weather in spring and rainy cool summer.
in hot and dry summer apple trees may not be infected with scab. Spores germinate on fruits and leaves only under certain conditions. The process itself and the degree of contamination depend on humidity and air temperature.
Moreover, humidity is determined not only by rain, but also by dew at night. Therefore, for gardeners, it is not uncommon for a tree to be damaged by scab, even in a hot, dry summer, but with heavy dew.

Blooming apple trees.

The first signs of the disease

Characteristic black spots with a velvety coating do not immediately appear on the leaves. At first, the disease on the leaves is noticeable in the form of indistinct, rounded, blurry chlorotic spots. By this time, the fungus had already managed to cause harm, starting to destroy plant tissues.
After a few days, the spots become visible signs dark spots with a characteristic velvety coating. At favorable conditions the fungus spreads throughout the crown.

Prevention of apple and pear scab

The crowns of trees should be well lit by the sun, quickly blown by the wind in wet weather. This requires annual pruning. A well-lit and quickly blown crown of an apple tree is less susceptible to infection.

Trunk circles are best kept under black fallow during the entire growing season. This reduces the harmfulness of the scab.

Almost the only source of spring infection is fallen leaves affected by scab in the past season. To protect your trees from the disease, you need to carefully collect and plant all the fallen leaves in the ground in the fall, dig the aisles with the leaves embedded in the soil. On pears, not only leaves should be destroyed, but shoots affected by scab.

Pear shoot affected by scab

If you find it difficult to dig up the ground, you can do something a little different. Spray the fallen leaves and tree trunks with a 7% solution of urea (700 g per bucket of water), this spraying destroys the infection well.

For the prevention of scab of apple and pear trees, it is useful to spray the trees with a preparation agate - 25 K(3 grams per bucket of water). This spraying should be done during bud break. It should be noted that the process of bud break is very short, only 2-3 days. Therefore, it is necessary to prepare for processing in advance so that everything is done on time.

How to treat apple and pear scab

If the disease is just beginning, or manifests itself weakly, apple trees can be processed agate - 25 K or zircon.

Treatment with "Bordeaux mixture"

The most famous and proven way to treat apple and pear scab is Bordeaux liquid. The effect of Bordeaux liquid lasts up to two weeks, so 6-7 treatments have to be done in one season.

The very first spraying is done before bud break. (300 gr. blue vitriol, 350 gr. lime diluted in a bucket of water)

Subsequent treatments are carried out every two weeks. The concentration of the solution is made weaker (100 g of copper sulfate, 100 g of lime per bucket of water) Bordeaux liquid can be replaced with any other copper-containing preparation.

Spraying apple trees.

Treatment with systemic drugs

Speed In one season, it is permissible to make two treatments with this drug. Treatments are carried out with an interval of 2 weeks, before flowering and immediately after flowering (2 ml per 10 liters of water). The drug retains its effect for 20 days.

Strobe."Strobi" is used to treat apple scab, pear, powdery mildew. During the summer, up to 3 treatments can be carried out, the interval is 2 weeks. The duration of the drug is 35 days. The use of "Strobi" can be combined with other fungicides.

Horus. The drug is effective at low + 3 - 10 * C temperatures, it is not washed off by rain. Treatments are carried out twice per season, at bud break and at the very end of flowering. The validity period is 30 days.

Treatment with mineral fertilizers

Scab can be treated with min. fertilizers. In this case, foliar feeding of plants is carried out simultaneously with the treatment. Trees are sprayed with a solution of any of these fertilizers:

• ammonium nitrate, concentration 10%
• ammonium sulfate, concentration 10%
• potassium chloride, concentration 3 - 10%
• potassium sulfate, concentration 3 - 10%
• potassium nitrate, concentration 5 - 15%
• potassium salt, concentration 5 - 10%

Complex treatment

For best results, a holistic approach to treating scab should be used.

To do this, trees are treated in the fall with one of the mine solutions. fertilizer (as described above). Processing is carried out after harvesting, before leaf fall. The air temperature must not be lower than +4*С. This will contribute to the destruction of other pests, and even increase the yield of the apple tree.

In the spring, before flowering, trees and tree trunks are sprayed with Bordeaux liquid (or any other copper-containing preparation).

After flowering, the trees are sprayed with some kind of fungicide (strobi, soon) or any other.

To make gardening easier, choose varieties of apple and pear trees that are resistant to this common disease.

Scab is a fungal disease that affects fruit trees. In pear, the lesion extends to flowers, fruits, shoots and leaves of the plant. It causes great damage to the crop, in order to cope with the disease, it is necessary to know the first symptoms of its manifestation.

Signs of the disease - scab on a pear

To correctly diagnose the disease, you need to know all its symptoms. Scab on a pear is more pronounced than on other plants and is easier to identify.

One of the signs of the disease is brown spots on pear fruits. They immediately catch the eye, it is impossible not to notice them.

With the development of the disease, brown spots with an oily coating appear on the surface of the pear leaves.

In the affected tree, the fruits become ugly, cease to develop normally.

sick tree sheds ovaries, flowers, leaves.

On the affected shoots of young trees, the slop is manifested by cracking of the bark and swelling. In these places, the mycelium of the fungus develops, which begins to multiply in the spring. Therefore, all damaged pear shoots must be destroyed.

Photo of scab at various stages

Why do pears get scab

Scab spores wake up only under favorable conditions, starting to multiply actively.

The development of the disease is favored by damp and cold weather in spring. At high humidity in summer days outbreaks may also occur. And for humidity environment influenced not only by rain, but also by heavy dew.

The most effective ways to treat scab on a pear

The disease can be cured only by complex measures. Scab develops rapidly and requires a unique approach to treatment.

Among all the methods, the most effective ones are highlighted:

1. Spraying the tree. This is one of effective methods, which are used in the fight against scab. It is necessary to carry out processing several times a season.

2. Regular inspection and destruction of the affected parts of the tree. Especially carefully examine the young shoots of the plant.

3. Disposal of infected fruits.

Combining these methods with preventive measures helps not only to contain, but also to prevent the spread of the disease.

How and when to spray a pear

Wood processing must be carried out at least five times. How to do it right?

The first treatment is carried out in early spring when the buds swell.

The second is sprayed with a pear during the laying of flower buds, shortly before flowering.

Subsequent processing falls on the period immediately after flowering, before the formation of fruits.

The fourth time the pear is sprayed two weeks after flowering.

Final processing is carried out only for winter varieties pears intended for long storage. It is held in late summer or early autumn.

Important! Treatment products must be changed regularly. It is impossible to spray with the same preparation.

Prevention of scab on a pear

Scab is common in almost all regions, so disease prevention must begin long before planting a seedling.

1. A landing site must be selected in accordance with all the rules. It must be well lit.

2. When laying a garden, you must observe the density of planting trees. The less often the plants are planted, the better for the gardener. Crowded plantings lead to an increased risk of disease. Regular pruning contributes to the rapid blowing of the crown after rains.

3. Cleaning up fallen leaves. Every gardener should know that the scab pathogen overwinters in the leaves, so a thorough garden cleaning in the fall will help to avoid an outbreak of the disease. They dig up the soil under the trees.

4. Regular spraying of trees.

5. Proper enrichment of the soil with nutrients.

It is necessary to start the fight against the disease in the fall, when the last harvest is harvested. During this period, preventive spraying is carried out. If the weather is rainy, then spraying is repeated on drier and finer days.

Scab on a pear is very dangerous, it covers large territories behind a short time which harms the gardener. The disease can kill the entire crop. The combination of medical and preventive methods gives good results in the fight against the disease.

How to spray a pear against scab

You need to start processing with preventive autumn spraying. It is carried out after the leaves fall. 50 grams of urea are dissolved in a liter of water and the garden is sprayed.

Experienced gardeners it is advised to carry out early spring spraying with copper sulphate. For 1 liter of water, 30 g of the drug is used with the addition of 40 g of lime. And in the fall, treat the tree with iron sulfate, dissolve 30 grams of the drug in a liter of water.

The following drugs also work well with scab:

Copper oxychloride;

Polycarbocin;

Polyhom;

colloidal sulfur.

At the first signs of damage, good indicators were noticed after treatment with zircon.

How to use systemic remedies in the fight against scab

Good results were shown by the drug "Skor", which is sprayed on the plant at least four times. About 2 ml of the drug is dissolved in a bucket of water.

The drug "Strobi" used to fight scab and powdery mildew on pear and apple. During one growing season, no more than three treatments with this drug are carried out. The interval between sprayings is at least two weeks. The effect of the drug lasts up to one month. Storby can be used mixed with other fungicides.

"Horus" – effective drug from the scab that operates under conditions low temperatures not washed away by rain. The treatment is carried out before bud break, then repeated at the end of flowering. The effect of the drug lasts up to one month.

How to treat scab on a pear with mineral fertilizers

Experienced gardeners advise at least effective methods treatment of scab with mineral fertilizers. At the same time, not only therapeutic spraying is carried out, but also foliar top dressing of the tree, which positively affects its condition.

Pears are sprayed with solutions of the following drugs:

Ammonium nitrate, the concentration of the working solution is not more than 10%;

Ammonium sulfate, concentration up to 10%;

Potassium chloride, drug concentration from 3 to 8%;

Potassium nitrate, working solution from 5 to 15%;

Potassium salt, solution concentration up to 10%.

Processing is carried out throughout the season.

During one growing season, up to five outbreaks of the disease are observed. Young plantings, which are more susceptible to fungal diseases, are the first to suffer. Older plants are resistant to scab. For stable crops, it is necessary to carry out all measures to combat the disease.

Experienced gardeners advise growing pear varieties that are more resistant to scab, which will save labor costs and allow you to get good harvests. These varieties include:

Clapp's favorite;

Taurian;

Trembita;

Margarita Marilla;

Take Hardy.

Important! Scab infects pears, as well as apple trees. But it does not pass from one tree to another, since the causative agents of the disease are different fungi. However, scab control methods are the same on all fruit trees.

Scab of apple and pear and apple trees is a fairly common disease that spoils a significant part of the crop. However, with timely preventive maintenance, a harmful fungus may not appear at all.

The name of the stone fruit disease is the same for pears and apples, but its causative agents are different. Yes, fungus hit the apple tree, not dangerous to a standing pear.

Manifestation of scab

Apple and pear scab: control measures

• For preventive purposes, infected leaves are destroyed, which, after autumn leaf fall, can be burned, buried in the ground in the trunk circle, and put into compost. If you didn’t have time to do this in the pre-winter, remove the foliage in the spring. In a pear, in addition, the affected branches are also cut off.
• Trunk circles are freed from weeds, mulched with peat or humus.
• In wet weather, tree crowns should be blown out and well lit. Therefore, the crown is cut off annually, dry and diseased branches are removed, as well as those that thicken the tree.

Features of treatment

Complex treatment

Gives the best results . After harvest, until autumn leaf fall, trees are sprayed ammonium nitrate or ammonium sulfate. These drugs are used at a concentration of 10%. For potassium chloride and potassium sulfate, the concentration should be 3-10%. Potassium nitrate and potassium salt should have a concentration of 5-15%.

Processing is carried out at an air temperature of at least 4 ° C. This measure contributes to the destruction of both scab and other dangerous fungi and various pests, increases productivity.

There are varieties of pear and apple trees scab resistant. Be aware that early varieties of apple trees are more likely to be affected by scab.

in number early varieties apple trees include:

The following varieties resist scab well:

• Cinnamon New;
• Welsey;
• Pepin saffron and others.

More disease-resistant varieties of pears:

• Lada;
• Chizhevskaya;
• Space;
• Northerner.

With timely preventive measures against scab on pear and apple trees, at the first signs of the manifestation of the disease, the disease will recede.

In the rainy summer a large number of nutrients washed out from the top layer of the soil. In such conditions, trees are stronger are affected by diseases and tolerate frosts worse. Regular fertilization will help prevent this.

Scab on a pear - how to fight?

For the fight, fungicidal drugs are offered. Before use, read the instructions and follow the prescribed precautions.

The most popular drugs are copper-based products. The fungus quickly dies under the influence of this trace element. In spite of high efficiency drug, it has its drawbacks and features:

Drugs are sold in specialized stores. You need to process the pear three times:

• when buds appear;
• after flowering;
• before autumn collection fruits.

The last spraying is carried out at least two weeks before harvest.

Bordeaux mixture

The fungicide contains copper sulfate and lime. The drug is available in the form of a powder, which is diluted with water and applied to the affected areas of the plant. Gardeners are advised to prepare an aqueous solution in the following concentrations:

• 3% solution for treatment in very advanced cases before flowering;
• 1% solution after flowering.

During the season, the pear is processed no more than four times. If the product does not protect well enough, the fungus is not afraid of copper and multiplies, up to seven chemical treatments allowed.

Bordeaux liquid

The preparation includes the same active substances as in the Bordeaux mixture, but diluted with water. The tool is available in plastic bottles volume of 100 and 500 ml. Liquid is more expensive than powder.

An aqueous solution of scab eliminates no worse than a dry mixture. It must also be diluted with water to obtain the required concentration. The instructions indicate how to treat a plant varying degrees damage, the exact dosages are indicated.

Horus

Horus Soluble Granules contain no copper. Main active substance the product contains cyprodinil, also effective fungicide. Protection against infection is achieved after two treatments: before and after flowering. You need to spray the pear with an interval of 10 days, the effect after that lasts a month.

The fight against scab should be carried out at the first sign of the disease. Chemical treatment is the only way to scab a pear when the fungus has already hit the tree, and brown spots have appeared on the leaves and fruits.

Following the rules of prevention and choice resistant varieties, you do not have to worry about the fact that the tree is sick, and look for information on ways to get rid of scab.