Why do thujas burn in spring. How to care for thuja in the garden so that it is lush and green? Why thuja turns yellow and what to do video

We are already used to the fact that in autumn dry leaves fall from trees and shrubs, but when this happens with coniferous plants, this is a signal for us that some kind of problem has appeared, but this is not always the case. In reality, at coniferous trees annually, a process very similar to leaf fall also takes place, only it does not look so beautiful.

Now it has become very popular to plant such a coniferous plant as thuja to decorate their front gardens. Therefore, in the article we will analyze in detail why the thuja needles (its leaves) turn yellow, it begins to dry and what to do about it.

The main reasons why thuja turns yellow and dries

1. natural process. In early autumn (September-October), you can often see that the needles located inside (near the trunk) turn yellow in the thuja, and not only the needles themselves, but small branches begin to fall off. These are needles that grew 3-5 years ago and have fulfilled their function, and because of the new needles, they get little sunlight.

2.Poor quality planting material. This is the most common reason why the thuja turns yellow immediately after planting. Therefore, when choosing a thuja for planting, you need to pay attention so that it is not overdried (if you scratch the root, juice should stand out), an earthen lump around the roots is preserved, there are no pests and signs of illness.

3.Wrong landing. Thuja will begin to turn yellow if the following mistakes were made during planting:

• too deepened the root;
• the root neck remained exposed;
• the wrong landing site was chosen: too sunny, windy, groundwater is far away, with unsuitable soil.

4.Insufficient care. With a properly chosen place, thuja requires minimal care, but reacts very strongly to insufficient watering (you need to water it once a week in a bucket, and during a drought period - 2 buckets twice a week) or waterlogging of the soil (the roots rot). And if the thuja was planted on sunny place, then the soil around the tree should be mulched to protect it from moisture loss and sunburn.

It is mandatory for a newly planted tree to install a fence to prevent animals from defecation on it.

5. Pest damage or disease. Fusarium, thuja brown and cytosporosis are considered dangerous diseases for thuja. To prevent them, after planting, thuja should be treated with a solution of foundationazole (10 g per 10 l of water) or.

Damage to the plant by thuja aphids and thuja false shields can lead to yellowing and falling off of the needles. To get rid of them, the tree is sprayed with karbofos, actellik, rogor or decis.

Having determined the reason why the needles (the so-called leaves) of the thuja turn yellow, you can save the whole tree from death.

Coniferous trees are unpretentious and durable. But even these mighty giants are subject to all sorts of diseases.

The article will tell about thuja diseases, why thujas turn yellow and how to treat them.

natural causes

The reason for the yellowing of the thuja can be hidden in many factors.

Below are the main natural reasons why the thuja turned yellow and withered, and its needles fall off.

1. Darkening of the needles is observed in thuja trees at the end of the growing season, usually in late autumn.

It looks like the tree is dying. But it's not. Thus, the thuja is protected from the cold and acclimatized to winter.

1. One of the reasons for the change in the color of thuja needles was the improper care of a freshly planted tree.

It is forbidden to water, move or expose a tree that has not taken root to bright sunlight. It is not recommended to allow animals such as dogs near the tree. They can damage the delicate roots, thereby ruining the plant.

Note: yellowing or browning of individual thuja branches at the bottom of the crown is a natural process. Withered shoots should be carefully removed by hand.

Thuja needles are gentle and straight, Sun rays leave burns on them. It is recommended to cover the tree, protecting it from the direct rays of the spring sun. To do this, use kraft paper, burlap.

Diseases

Consider the most common diseases of the thuja shrub:

1. The most common cause of yellowing of the thuja is improper planting of the seedling.

The root neck is incorrectly located, too deep or, conversely, very close to the surface. The next most popular reason is when the root system undergoes decay.

Most often, the cause of decay lies in the pathogenic activity of fungi and microorganisms, such as aphids, bark beetles or mites.

1. Root burns.

Excess fertilizer or lack of oxygen can cause burns to the thuja root system. Because of which the tree turns yellow, turns brown and withers.

The needles crumble. Small ties appear on the branches, which eventually turn into cones. They, in turn, adversely affect the tree's ability to reproduce.

1. The damping of thuja is also a common cause of falling needles.

This happens as a result of planting trees too close to each other. Imitation. With this method of planting, there is insufficient air circulation around the plants.

How to treat

You can check if the tree has died in this way: bend the branch, the dead branch will break off, as it has already dried up, and the living one will bend.

I would like to note that all diseases of coniferous trees are easily treated if they are detected in time. The fungus is treated with a solution of foundationazole.

Dilute 10 g of the drug per 10 liters. water and process the tree 2 times, with a break of 10 days. Affected processes are subject to immediate removal.

To exterminate insects, solutions of karbofos, actellik or fungicides are used.

Please note that when insect pests appear on a tree, it is important to prevent the formation of larvae. Otherwise, the treatment is useless and it will be impossible to remove the insects.

Prevention

First of all, you need to follow the rules and care for her.

Remember that before winter the soil is not fertilized. All land enrichment work begins in the spring, during the active growing season..

Provide proper training for winter.

1. To do this, the roots of the tree are covered with foliage.
2. The crown for the winter should be covered with burlap. It is also recommended to twist tall trees with bundles. This will protect fragile branches from breaking off under the weight of snow.
3. Also, do not forget to periodically shake the snow from the trees in winter.

Thuja is popular in landscape design thanks to its beautiful evergreen needles. Therefore, any disease immediately affects its decorative effect, sometimes causing irreparable harm. Let's try to figure out what factors affect the yellowing of the thuja and what to do to avoid this trouble.

Thuja is characterized by unpretentiousness and resistance to diseases, as well as to pest attacks. However, like any other tree, this resistance is not absolute - the plant may periodically turn yellow, shed its needles, and its branches may dry out. To find out how to help thuya in such a situation, you first need to establish the cause of such phenomena. There may be several of them:

Natural. Often the needles live from three to six years, and after this period they first lighten, then turn yellow and, in the end, die. This process is accompanied by yellowing of individual branches in the middle of the crown around the trunk. Subsequently, such parts of the tree simply fall off. A similar phenomenon is called branch fall and is observed, most often, in autumn.

Seasonal. In winter, some types of conifer can turn golden-bronze, brown, brown. Thus, the tree reacts to a cold snap and adapts to frost. With the advent of spring, the needles should return to their usual color. However, if after the winter the thuja turned yellow and did not turn green again, it's time to think about what to do, because in this case you are dealing with some serious problem that needs to be addressed as soon as possible.

Did you know? Seasonal color changes are characteristic of the western and folded arborvitae. The varieties of European arborvitae "Brabant", "Columna" and "Holmstrup" turn slightly brown. In winter and summer, the variety "Smaragd" remains monochromatic, for the needles of which no frosts are terrible.

Like all conifers, thuja is prone to sunburn in spring. At this time (preferably from February), it must be covered with kraft paper, agrofibre or other similar devices.

Animals. The reasons for the change in the color of the thuja and the drying of the needles can also be regular bowel movements of cats or dogs on it. From dog urine, the tree is covered with a black coating.

Also, the reasons for the changes in appearance Tui can become improper care, diseases and pests. We will tell about them in more detail.

Wrong care

Over or under watering

Thuja loves well-moistened soil, but can not stand the stagnation of moisture, however, as well as the close occurrence of groundwater.

The recommended frequency of watering for arborvitae is once a week, during dry periods, twice a week, and in the first month after planting, daily. The volume of water during irrigation, in normal conditions, should be a bucket per tree (with unfavorable factors - two buckets). In order for moisture to be retained in the soil, but not to stagnate, the ground in the trunk circle must be mulched: in winter with sawdust, in summer with peat.

Excessive watering and stagnant moisture for more than two weeks lead to rotting of the roots of the plant and contribute to the development of fungal diseases. With insufficient watering, the thuja turns yellow and dries.

He loves thuja and periodic sprinkling, especially in the summer heat. It is better to do this in the evening, so that drops on the needles do not provoke sunburn.

Mistakes in feeding

Top dressing for thuja is useful, but in moderation. If fertilizers were applied at planting, then the next time the tree will need to be fed in two years. In spring, the plant is fertilized with nitrogen compounds, in early summer with potassium. If the tree grows on poor soil, then in summer fertilizers containing phosphorus will also be needed. However, it is worth remembering that excessive fertilization can cause root burns and yellowing of shoot tips.

Important! In no case should you feed the thuja before the winter period. This is fraught with the development of various kinds of diseases.

About what substances she lacks, thuja can tell you with her appearance. So, yellowing or strong lightening of the needles often occurs due to a lack of iron. In this case, the thuja should be fertilized with a complex fertilizer, for example, Kemira Universal or Osmokot. If young tree suffers from a lack of phosphorus, its needles will turn red-violet, and with a nitrogen deficiency, thuja slows down growth and development, becomes chlorotic.

Wrong choice of place for thuja

When choosing a place for planting a conifer, one must take into account the fact that the tree grows well on drained soil as part of soddy soil, peat, and sand. Planting it in sandy, clay or peaty soil can adversely affect the development of the plant, causing yellowing and shedding of the needles or drying out of the lower branches.

Did you know? In the wild, the most beautiful arborvitae grow on moist, fresh, slightly acidic or neutral soils in mixed forests.

For the correct planting of the thuja, you need to know one rule - the root neck should be at ground level, not deepened into it. It is not worth deepening the tree strongly, this can lead to dropping of the needles and rotting of the bark in the lower part of the trunk. In the future, it is necessary to ensure that the root neck is not completely exposed, otherwise the appearance of the conifer may also suffer because of this.

Harmful for thuja are thickened plantings. In places where the branches of different trees come into contact, the needles may turn yellow and fall off. The recommended minimum distance between seedlings is 1 m.

Thuja is a light-loving plant, so it must be planted on open areas. However, the first time after planting, it is important to shade the seedling from the sun, otherwise the needles may lighten. It is advisable to choose a place for landing where direct sunlight will not fall on it at noon. Of course, thuja will not grow in full shade and will completely lose its attractiveness. Remember: the condition and appearance of the plant in the future will depend on the correct planting and choice of location.

How to cure thuja from diseases

If you planted a tree, following the recommendations, you are sure that you are taking care of it properly, but you notice that it turns yellow, looks lethargic or sheds its needles, then the cause of such phenomena may be the defeat of the thuja by some disease characteristic of conifers.

Phytophthora is one of the most dangerous diseases of conifers, including thuja. If you run it, then it will be impossible to help the tree. The development of this disease can be recognized by the characteristic features: the needles of the thuja acquire a gray color, the tree fades, the lower part of the trunk becomes soft and covered with bloom. The fungus that causes phytophthora infects the root of the shrub, which becomes brittle, begins to rot and exude bad smell. When such symptoms appear, when it is already clearly visible that the thuja is disappearing, it will be too late to think about what to do. You will have to get rid of the tree, and change the ground under it, since the spores of the pathogen can exist there for a long time.

The main causes of phytophthora are stagnant moisture and lack of drainage in the soil, as well as damage to the bark by larvae of wireworms and bark beetles. For the prevention of the disease, fungicidal sprays are used with "Fundazol", "HOM", "Abiga-Peak".

brown shoots

Yellowing of individual scales in early spring may indicate the development of a fungus on the thuja that causes brown shoots. As it multiplies, the entire shoot turns brown and dies. If such signs are found, infected branches should be removed immediately.

In order to prevent the plant, it is necessary to fertilize, and sprinkle the soil under the trunk with limestone. Also, every 14 days, from July to October, you can spray "Fundazol" (0.2%).

Rust and Shutte Tui

Frequent diseases that affect conifers are rust and schütte, which mainly harm young trees. Ailments are manifested by a change in the color of the needles to a darker, brown, followed by their fall. Black dots form on the needles - foci of sporulation. Diseased branches are cut and destroyed. For the purpose of prevention and treatment, the plant must be sprayed with copper-containing preparations (Bordeaux mixture, "HOM", "Oxych"). Also, for the treatment of coniferous trees, watering under the root "Fundazol" is used. Schutte is treated with the drug "Topsin-M". Regular mineral supplements are used as protection.

How to deal with thuja pests

Thuja can be damaged by a number of harmful insects. Their vital activity on a tree leads to serious damage to the needles, bark, and also provokes further development fungal diseases. So, thuja is affected by sucking, needle-eating, root-damaging pests.

Yellowing needles may be the result of the presence of aphids. These small gray-brown insects feed on the sap of the tree on the underside of the shoots. If a small amount of them is found, weekly soap washing of the needles can help, but with mass destruction you will have to resort to the use of insecticides allowed for thuja.

Important! When washing with soap, the soil under the thuja must be covered in order to prevent the soap solution from getting on the roots.

spider mite

Already from the name of this pest it is clear that the result of its vital activity will be a web. Entanglement of needles with cobwebs is one of the characteristic symptoms that a spider mite is rampant on a thuja. Also, the needles are covered yellow spots, brown and crumble.

The spider mite can cause the greatest harm to plants suffering from drying out of the soil on hot days. This pest is very prolific and produces up to six offspring per season, so the fight against it will require serious efforts.

For the purpose of prevention, it is necessary to prevent the drying of the soil in summer season, as well as often "sprinkle" the plants to maintain good humidity.

To get rid of the tick, spraying with infusions of dandelions, garlic or a solution of colloidal sulfur is used. With mass infection, acaricides will help.

bark beetle

The presence of holes in the bark of a tree indicates the presence of stem pests. One of them is the bark beetle.

The leaf roller makes cocoons between the needles, connecting them with a web. It can eat needles for a month. Its harmfulness is very high, since this small insect can lead to the death of a tree.

For prevention and treatment, thuja is sprayed twice with insecticides: in May and in the first half of June. With a strong infection, the treatment is repeated in July.

Trapping belts are used as preventive control measures. They are made from burlap or straw and put on trunks in early spring. Such devices will not allow insects that wake up in the soil after wintering to get to the needles.

For minor damage, use mechanical way fight-false shields with a brush or a blunt knife, simply peel off the bark. In advanced cases, insecticides are used.

The larvae of the pestry moth leave behind brown needles and dying tops of the shoots. They gnaw small holes in the needles. For laying eggs, the moth flies out in May, but it is quite difficult to notice it, since its size does not exceed 4 mm.

In order to prevent moths from laying eggs on a tree, it is sprayed twice with preparations containing pyrethroids in the second half of June - early July. The tops of the shoots will need to be cut off.

Also, thuja is attacked by a wireworm, which harms the roots of the plant. As a result of its harmful activity, the immunity of the thuja is greatly undermined, it begins to lag behind in growth and development. The wireworm can also be the answer to the question "Why do thuja branches and needles dry?". Trees growing in low-lying areas with acidic soil and frequent moisture stagnation suffer from this pest.

Control methods consist in deep autumn digging of the soil, its drainage and liming. The destruction of the wireworm is also facilitated by preparations with the active substance diazonin.

Thuja is so beautiful that it deserves to be planted everywhere. However, if your tree has suddenly lost its former beauty, do not rush to bury it, but rather try to help. By identifying and eliminating the cause of the poor appearance of the tree, you can continue to enjoy the look of an elegant and fragrant conifer.

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Why do thujas turn yellow? Perhaps every second owner of evergreen shrubs faces this issue. There can be several reasons for changing the color of the needles. To find out the true, you will have to carefully observe the plants. So you can determine exactly what happened to the fluffy beauties and start a "rescue operation."

Natural yellowing of needles

Yellowing does not always indicate a serious problem. Sometimes this is a completely normal process. The fact is that every needle has a life span. On average - 3-5 years. After the expiration of this period, the needles lose the chlorophyll grains responsible for the green color, turn yellow and die. After some time, a new one appears in place of the old needle - fresh and green.

If you notice that on the inside of the crown, individual needles fade and fall off, then most likely nothing terrible is happening. It's just that thuja changes its "fur coat".

Some varieties also change color with the advent of autumn. So, thuja Holstrup, Brabant and Columna are painted in a light brown shade. Color change is a response to a decrease in temperature, allowing you to adapt to new conditions. In the spring, everything returns to normal and the crown turns green again. If this does not happen, then the reason lies elsewhere.

Thuja Columna hedge

Landing and departure errors

The second most common cause of needle yellowing is errors in planting seedlings and subsequent care for them.

Soil characteristics are of particular importance. Planting thuja on sandy soil who is unable to hold nutrients, leads to a color change. Dense clay soil contains little oxygen necessary for the full development of the root system. Weak roots cannot absorb the necessary trace elements in sufficient quantities, which also leads to the appearance of dry needles.

Peatlands with stagnant waters - not the best place for landing. The roots, which are constantly in humid conditions, begin to rot, and this is again reflected in the appearance of the thuja - it fades, turns yellow and crumbles. With the surface flow of groundwater, the arrangement of a drainage cushion is mandatory. Otherwise, the tarnishing of the needles and the "baldness" of the branches cannot be avoided.

Yellowed thuja branch

In addition to the above, yellowing leads to:

• excessive deepening of the root neck during planting, or, conversely, its exposure - the root neck should be flush with the ground;
• too tight fit. The distance between individual shrubs must be at least 1 m. The exception is when arborvitae are planted to obtain a hedge;
• drastic change in growing conditions. If the shrubs have been growing in the shade for a long time, and for some reason you decide to transplant them in the sun, then get ready for the fact that the green “cap” may not be as bright as before;
• abuse of fertilizers. Uncontrolled introduction of complex mineral additives is harmful - the needles turn yellow and become loose;
• lack of moisture. Insufficient watering negatively affects the general condition of the thuja. She starts to get sick and turns yellow.

Thuja changes color with a lack of iron in the soil. First the needles turn yellow, then white.

Domestic animals cause great harm to coniferous plants. When cats and dogs regularly mark bushes, this leads to damage to the root system and the appearance of a red bloom on the shoots.

Another common cause of yellowing needles is sunburn. Many varieties of thuja are sensitive to the spring sun, and if they are not protected with covering material, then the end of winter will be marked for you by the appearance of yellow-orange burns on the branches.

A thuja seedling that died in the spring from a sunburn

Pests and diseases

If you have ruled out natural yellowing, improper planting and care, then proceed to a careful examination of the shrubs. Perhaps pests have settled on them.

The most common sucking pests are thuja false scales and aphids. The first is a small brown insect, no larger than 3 mm in size. You need to look for her, or rather them, on the underside of the shoots. Aphids also live on the underside of branches. But they have a grayish color with a slight wax coating.

Thuja branch affected by thuja false shield

Of the needle-eating pests, the moth and gray leafy leafworm are the most to be feared. Moth is easy to see. Caterpillars do not even try to hide and openly gnaw passages in the tissues of the plant. The danger of leaflet infection is manifested in the fact that the thuja not only loses its decorative effect, but also dies with a careless attitude. You can get rid of such "guests" with the help of preparations containing pyrethroids and sanitary pruning.

Another enemy of the thuja is the click beetle. The larvae of this insect feed on the roots of the shrub. It is noteworthy that the process can take several years. At first, tiny larvae eat small thuja roots without causing significant damage, but after 3-5 years they become able to gnaw thick roots. The needles quickly turn yellow, dry out and fall off. Digging the soil and processing with diazinon-based products will help to defeat the attack.

Click beetle larva

Yellowing needles may be associated with fungal diseases. The tinder fungus and Phytophthora cause not only a change in the color of the needles, but also a softening of the bark, cessation of growth, drying out of the shoots and rotting of the roots. Fighting fungal infections is difficult. Sick shoots are cut off, “wounds” are treated with paint on drying oil, bushes are sprayed with preparations containing copper, but if the affected area is extensive, then it is recommended to completely destroy the plantings and disinfect the soil.

Root system affected by late blight

Now that you know why arborvitae turn yellow, it will be easier for you to determine the true root cause and take action to preserve the natural beauty of this wonderful plant. Let your evergreen "wards" remain bright and extraordinarily beautiful!

Thuja is a durable and unpretentious plant, which, with its strict beauty, is ideal for any garden and will delight more than one generation of people. But even in the care of unpretentious green pets, some difficulties can arise. Let's deal with one of these problems - why does the thuja turn yellow.

It may happen that scaly needles suddenly begin to turn yellow on your beautiful thuja. What to do? First of all, it is necessary to find out the cause of yellowing, and in our case, the reasons may be different.

Although the thuja is a long-liver, its needle-scales have a shorter life span, namely from three to six years. Having lived the time allotted to them, the needles grow old, lose chlorophyll grains, turn yellow and fall off, and young ones grow in their place. This is a normal, natural process that should not cause any concern.

Also, a natural process is the seasonal change in the color of the needles of some types of arborvitae. This is due to the adaptation of the plant to frosty winters and lack of light. In the spring, when daylight hours increase and the process of sap flow begins, the color of the needles is restored.

For example, the basic (wild) varieties of folded thuja (Thuja plicata) and western thuja (Thuja occidentalis) in winter period become golden bronze. Ornamental varieties Holstrup, Columna and Brabant take on a light brown tint. But the Smaragd variety, even in severe frosts, remains a deep green color.

Thuja folded
Thuja western "Columna"
Thuja western "Smaragd"

Wrong fit

Often thuja turns yellow with improperly selected soil and landing site. Let us dwell on the main points that can cause yellowing.

When planting thuja, it is very important to choose the right soil mixture. On clay, heavy soils, the roots will not receive oxygen and will not be able to develop normally. sandy soil very quickly passes moisture through itself, and the plant does not receive enough water. The most suitable soil for this plant should be nutritious and light (a mixture of soddy soil, sand and peat). Drainage is very important, as stagnant water is detrimental. For the same reason, thujas should not be planted in places where groundwater is located close to the surface.

An important point is the level of landing of the thuja. With a strong penetration of the root neck, the trunk will begin to rot, and if it is not deep enough, the roots will dry out.

It happens that a young thuja immediately begins to turn yellow, here the reason may be in a bad seedling. When buying, you should pay attention to the humidity of the earth coma, the branches should be elastic and flexible.

When planting these plants in groups (for example, a hedge or a high curb), you must strictly maintain the distance between them. The minimum gap between thujas is 1 meter. With heavily compacted plantings, thujas begin to hurt.

If you saw the reason for the yellowing of your thuja in not proper fit, then it must be urgently transplanted in compliance with all necessary conditions, and then the tree will not disappear.

Wrong care

Another reason why thuja turns yellow is mistakes in caring for it.

Diseases

The fact that your thuja turned yellow may be to blame for some fungal diseases. Tui are most often affected by them. In the course of the disease, they form brown-black outgrowths or rounded spots on damaged tissues, in which spores develop. These diseases affect the trunk, branches and needles.

Shutte brown

For example, Shutte brown in early spring, it envelops thuja branches with cobweb dense mycelium of brown or gray color. The needles also become brown, it does not immediately fall off, as it is glued together by this plaque. If urgent action is not taken, then the entire plant will be infected and die.

Another type of fungal disease destroys the tissue of the cortex. It leads to necrosis. Absolutely all its parts are affected, while the bark often begins to fall off. The needles also change color. The change occurs first in separate spots, which then merge. Most often, necrosis affects trees weakened by adverse weather conditions (hard frosts, drought). Sick trees attract stem pests.

Some types of fungal diseases affect old, low-lying branches, while others affect only young growth. The fight against them consists in the careful removal of damaged branches and treatment with fungicides. Moreover, it is necessary to spray repeatedly with an interval of two weeks.

root rot

A very dangerous thuja disease is root rot. In this case, the fungus Phytophtora cinnamomi destroys the surface tissue of young roots. The plant turns pale yellow and then dries up completely. The main symptom of this disease are changes in the trunk in the region of the root collar. The bark in this place becomes softer, a plaque appears with light dots, and the trunk under the bark from cream turns brown. Young thuja from this disease dies in one season. In a hedge, after the disease of one plant, mass infection is possible. Therefore, at the first sign of illness, the entire plant must be dug up and burned. And it is better to replace the earth in this place, since the spores of the fungus remain in the soil. Phytophthora fungi infect thujas weakened by heavy soils, so be sure to take care of proper planting and caring for the plant.

Coniferous plants in the garden are a true decoration that brings grace and rigor to the landscape, which has a magical…

Pests

Tui, like other conifers, has pests that form two main groups.

1. Sucking

A distinctive sign indicating the defeat of the thuja by this type of insect is the appearance of a gray coating on the needles and the massive movement of ants over the plant.

- Thuja false shields they look like brown buds, and juniper scale insects form growing yellowish ulcers. They are attached at the base of the shoot. BI-58 is well cured, as well as drugs such as Aktara and Lufox.

- Moth moth. Activated in May. Its larvae gnaw passages in the scales of the thuja, which leads to a change in color and the death of the shoots (the tip is most often affected). To combat the moth, drugs are used, which include pyrethroids.

- thuja aphid. It lives most often at the bottom of the trunk. It sucks the juice from the needles, this leads to yellowing and falling of the needles. It is necessary to spray with Karbofos.

Moth moth
thuja aphid

Mayfly bagworm

- Mayfly bagworm. Her caterpillars feed on needles and thuja twigs. A characteristic sign of defeat by this insect are silky sacs yellow color(about 5 cm), hanging from the branches. This insect causes a mass fall of needles, greatly weakens the plant, which makes it more accessible to other pests.

- Larch leaflet. The larvae of this insect damage the needles of the thuja, weaving it into small cocoons. The needles then turn yellow and fall off.

- spider mite. The presence of a thin cobweb and small light dots on the thuja needles will tell you about the defeat of this pest. If the lesion is very strong, then the plant becomes white and covered with cobwebs. You can fight the tick by repeatedly spraying with insecticidal and acaricidal preparations (for example, Actellik, Envidor, Akarin, Fitoverm and others).

Weevil beetles (mower beetles)

- Weevil beetles (mower beetles). In spring, these insects eat the needles and bark of young plants. And the larvae living in the soil feed on the roots. This causes browning or yellowing of the needles. To combat the larvae, it is necessary to water the soil with an insecticide (for example, Aktara, Antikhrushch). It is also effective against beetles and larvae to pollinate the soil around the plant with the Confidor preparation.

2. Stem

Thuy beetle

If the bark exfoliates on your thuja, and under it you find intricate holes and passages, then it means that the plant is attacked by stem pests (bark beetles). In our case, this thuja beetle(Phleosinus). It damages the bark so much that the plant dies. On the damaged areas, small holes gnawed by the beetle are visible.

The fight against bark beetles is very difficult. One of the means of struggle are pheromone traps. They are attached to a tree and are used to attract these insects. When they flock to the trap, the tree with them is uprooted and burned. Antipheromones are also used, on the contrary, they repel beetles. These substances are safe for humans and animals.

To combat stem pests, you can use drugs such as BI-58, Aktellik, Clipper, Fufanon and others.