Boxwood: fighting diseases, pests and fungal attacks

Fight boxwood diseases properly and maintain boxwoods all year round

Boxwood: fighting diseases, pests and fungal attacks: fungal

The boxwood is a very popular evergreen shrub that is often planted in the entrance area as a bush, a natural screen or as a shaped boxwood ball.

Between March and May finally show inconspicuous, but fragrant yellow flower bud.

For a beautiful and above all healthy boxwood regular care is necessary. Particularly problematic is the infestation by fungal spores or Buchsbaumzünsler.

Both diseases damage the plant permanently, can even lead to death and must therefore be treated as quickly as possible. The fungus finds optimal weather conditions in summer:

Heat and moisture promote fungal growth, while the spores are spread by warm winds.

Find out below how to protect and properly care for your box trees from disease.

Fungal attack in the boxwood (Cylindrocladium buxicola)

Boxwood: fighting diseases, pests and fungal attacks: fungal

The boxwood is considered as ornamental wood and is planted as an evergreen plant especially in private gardens and public parks.

Whether as a hedge, artfully shaped specimen plant or wild bush - the boxwood meets all requirements and between March and May to the eye-catcher in the garden, if him small yellow flowers adorn.

In the last few decades is one Europe-wide boxwood dying to observe, which worries experts increasingly. The most common reason is a detected infection with the fungus Cylindrocladium buxicola, which was previously rarely found in Germany and exclusively attacks boxwood.

Due to changing climatic conditions, the fungus finds optimal conditions and spreads very quickly. It already helps to plant preventively robust varieties. When particularly vulnerable such as the boxwood varieties "Blue Heinz" and "suffruticosa".

Brown leaves and brown spots on the boxwood

Boxwood: fighting diseases, pests and fungal attacks: pests

Fungal attack by the pathogen Cylindrocladium Buxicola. Bright spurs on the Balttunterseite at the boxwood.

The causative agent Cylindrocladium has in summer the ability to spread his spurs quickly.

In the wet morning hours There are plenty of white spores on the underside of the leaves, while warm winds spread the spores easily throughout the garden and in the neighborhood.

If the weather stays moist and warm, further damage can be expectedbecause the infection is bound to leaf wetness, because on wet leaves, flying spores will adhere more easily.

Wherever possible, boxwood should therefore protected from too much moisture become.

A recognition of the fungal attack is often not easy for laymen. On first symptom, in addition to the bright spores on the underside of leaves, is brown discolored foliage.

Once this stage is reached, only one helps radical pruning of diseased plant parts. This clippings does not belong on the compost pile and is disposed of in residual waste, The same applies to fallen leaves, which may even have already contaminated the soil.

Tip: Also remove the topmost layer of soil, as the fungus can survive in the ground for several years.

Misdiagnosis: Boxwood cancer

In the diagnosis of fungal diseases are a trained eye and a lot of experience asked, because often turns out to be an alleged infestation with Cylindrocladium buxicola as one of Volutella buxi caused illness, which is also called boxwood cancer.

Here too you will find yourself initially pale green leaves discolorationwhich lead to the death of shoots of vital plants. You can also detect such an infestation on pale pink to apricot-colored spore surface the underside of dead leaves.

Also the mushroom Fusarium buxicola can lead to similar phenomena, but it is extremely rarely diagnosed.

Fight boxwood mushroom

Boxwood: fighting diseases, pests and fungal attacks: fungal

With a fungal attack, the entire hedge can quickly be affected.

Since hardly any effective preventive and curative preparations for the fungal disease are known, Different hygiene measures must be consciously adhered toto minimize the probability of infestation and duration. Even radical clearing may be indicated.

Choose robust varieties:

The species Buxus sempervirens 'Suffruticosa' is particularly susceptible, but the fungus also occurs in other Buxus species. Resistant varieties have not yet been bred.

Generally, large-leaved varieties such as "Faulkner" are less susceptible to fungal attack.

Plant only healthy goods:

You should not buy visibly ill plants in principle. Watch for discolored shoots and pale leaves.

Avoid leaf wetness:

Fungal infections require persistent moisture and heat. So only water at the plant base - Ideally early in the morning or at dusk.

Remove sick plant parts:

Diseased plant parts are always removed together with the fallen leaves. The top layer of earth should also be disposed of, because the pathogen in the soil can last for several years, Clippings and fallen leaves are not part of the compost.

Cutting out diseased areas:

These less radical cutting measures can lead to success in fast growing and less susceptible varieties. But often also just above the ground Infection sites (discoloration) on old wood can be found, this option is often eliminated.

Strengthen the resistance of the plant:

Existing boxwood stocks should be replaced by a good care and regular fertilization be strengthened.

Disinfection and cleanliness:

All equipment and tools used, as well as shoes and hands must be after use Thoroughly cleaned and if possible disinfected before further plantings are processed. In this way you prevent transmission of disease spores to other plants and garden areas.

Infestation with the caterpillar of the boxwood conifer

Boxwood: fighting diseases, pests and fungal attacks: attacks

Boxwood brooder larvae form webs inside the bush and eat the leaves and bark.

The Boxwood Borer (Diaphania perspectalis) is an East Asian small butterfly that was introduced to Europe in the last century. The butterfly deliberately lays its eggs on box trees - the larvae are therefore unpleasant pests that eat both the boxwood leaves and the bark of the plants.

In this way, the boxwood poacher larvae threaten also called China caterpillar, private collections and box trees in public parks.

The caterpillars have one yellow-green-black-striped body color and can up to five inches long become. The pests begin already in early spring with its feed on many parts of plants.

If an infestation is found, must be acted quickly because the pest rapidly multiplied, several generations a year forms and can eat the boxwood in a short time bald. All plant parts above these feeding sites die.

Tip: The formation of dense webs inside the boxwood bushes is typical for the caterpillars of the boxwood conifer. At least now you can detect the infestation - often it is then already too late.

Fight boxwood growler

Boxwood: fighting diseases, pests and fungal attacks: diseases

The Buschbaumzünsler deliberately searches for box trees for oviposition.

The effective fight the caterpillars is not easy. Since the pests are preferably working from the inside out, an infestation can often be detected only when the plant is already destroyed or severely damaged.

Even with pesticides Buchsbaumzünslerlarven are difficult to catch. In large and densely leafy boxwood plants, it is difficult to completely wet the interior area with pesticides. In addition, the dense web of the caterpillar forms an additional obstacle.

When first measure for the private garden is recommended Collecting the caterpillars as well as that Remove the braids and infestation nests. Also check the leaf bases on an infestation and repeat the process over several days.

Tip: A hard stream of water can help flush caterpillars from the shoots. Even a strong shaking can already help. Finally, the animals are destroyed or disposed of with household waste.

How to recognize the caterpillar of the boxwood conifer?

Boxwood: fighting diseases, pests and fungal attacks: pests

The caterpillars of the boxwoodtailer eat the leaves and bark of the plant.

The caterpillars of Buchbuscher are well camouflaged on the evergreen shrubs: with their green body color and the black dots they are difficult to recognize. Depending on the age, the caterpillar is between nine millimeters and six centimeters large. Often the pest sits between and under the leaves.

Initially, the boxwood's caterpillar spins larger leaves or smaller twigs, later stopping temporarily in a self-made sack. In this condition, the caterpillar hides in webs that run through the entire boxwood.

A few days after pupation, the bright butterflies hatch. The white wings of adult moth have one wide black border, Later, the boxwood conifer deliberately lays its eggs on a boxwood plant - this is where the next generation of caterpillars hatch.

Frequently, boxwood moths are found in gardens and public parks until December sighted. A butterfly can do it up to four generations a year bring forth.

Boxwood fleas infest boxwood after expulsion

Nice shortly after the shoot Occur at the boxwood often larvae of boxwood leaf flea, experts speak of Psylla buxi, on. The infestation occurs mainly at the shoot tips. The adult, winged leaf fleas appear from late May to early June.

The pests eventually suck on the leaves, causing them curl like a spoon, In addition, the larvae divorce white, cotton-like wax threads which later ruin the shoot tips. In case of increased infestation, the leaves affected by the larvae may be additionally affected black soot thickening fungi colonize.

A fight of boxwood leaf flea is with pesticides that exist in gardening shops, possible, but usually not required, On easy pruning of the shoots also reduces the infestation.

Grow boxwoods

Boxwood: fighting diseases, pests and fungal attacks: boxwood

Between March and May the boxwood blossoms.

The Buchsbaum or Buchs (B. sempervirens), also called Buxus, is an ancient garden plant that is widely distributed in southern and central Europe.

The book counts as evergreen plant to the most popular garden plants and is now offered in a large variety of varieties for the private garden.

For example, the small-bred cultivar "Suffruticosa" is an ideal border plant and thrives well as a ball book in a bucket on the balcony.

Boxwood: fighting diseases, pests and fungal attacks: diseases

Book trees are propagated by cuttings in late summer.

In most gardens, boxwood can be found as a small hedge (border delimitation) for a natural screen or as a deliberately set specimen plant. Box trees do not make any particular demands on the soil, but prefer damp locations with loose, calcareous soils and tolerate sun as good as like shadows.

Because the boxwood up to two meters high and wide he can grow enormously editable and is ideal as a form of wood.

You can draw a book yourself.

The general rule is that boxwood branches only root in the calendar months that contain an "r". Especially good planting time is the late summer. Now the last cuts are made before hibernation, and the book can be propagated by cuttings.

To do this, cut off some branches about 10 cm from the bush and remove the leaves at the end of the style. Then place the cuttings in a sufficiently large container of fresh flower or compost soil, press firmly and water well.

Tip: According to an old folk belief, fruit trees near Buchs are particularly fruitful.

Alternatives to boxwood

Box trees are extremely cut tolerant, grow densely branched and form fine green leaves. Nevertheless, the book balls are very prone to diseases and pests.

Therefore, many hobby gardeners decide to more easy-care alternativeswhich are similar to the book tree visually and in their care.

Particularly suitable is the variety Dark Green the Japanese husk (Ilex crenata), The stingless plant thrives in the shade as well as in the sun and is hardy. waterlogging on the other hand, it applies too avoid, so that heavy soils are treated with sand and mature compost before planting should be.

The box tree is similar to the Tatra daphne (Daphne arbuscula)who is due to his low growth also suitable for bedding or as groundcover. The daphne also forms in April and again in late summer violet flowers, which attract beneficial insects into the garden with their pleasant fragrance.

If you are looking for an easy-to-maintain evergreen conifer, you can look at the short-lived Variety "Mecki"the plant family of the Thujen (Thuja occidentalis) To fall back on. The fragrant needles retain their dark coloring even in winter, making the small shrub an eye-catcher.

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