Fungal attack during boxwood and targeted care
Fungal attack during boxwood and targeted care
fight boxwood disease properly and maintain box trees all year
The boxwood is a very popular evergreen shrub that is often planted as bush, natural privacy screen or as cut in the form Buchsbaumkugel the entrance. Between March and May finally inconspicuous but fragrant yellow Blütenknäule show.
For a beautiful and above all healthy boxwood regular maintenance is necessary. Particularly problematic is the infestation by fungal spores or cydalima perspectalis. Both diseases of the plant damage permanently, may even cause the death and must be treated as soon as possible targeted. The fungus is in the summer optimal weather conditions: heat and humidity encourage fungal growth, while the spores are spread by warm winds.
Find out below how you can protect your box trees from disease and maintain properly.
Contents about Boxwood diseases and boxwood care
- Fungal attack during boxwood (Cylindrocladium buxicola)
- fight boxwood fungus
- Buy remedy boxwood dying online - at Westfalia Shipping
- Attack by the caterpillar of the Buchsbaumzünslers
- fight cydalima perspectalis
- How to recognize the caterpillar of the Buchsbaumzünslers?
- Boxwood psyllids infested trees book after shooting
- cut book only with sharp blades
- grow boxwoods
- Alternatives to Boxwood
Fungal attack during boxwood (Cylindrocladium buxicola)
The boxwood is considered ornamental tree and is particularly fond planted as evergreen in private gardens and public parks. Whether as a hedge, artfully shaped specimen plant or wild bush - the boxwood meets all requirements and March-May an eye-catcher in the garden when it decorate small yellow flowers.
In recent decades, a European boxwood death is observed, the experts increasingly worried. The most common reason is an established infection with the fungus Cylindrocladium buxicola, previously rarely encountered in Germany and affects only boxwoods. Due to the changing climatic conditions, the fungus finds optimal conditions and spreads very quickly. It already helps preventively to plant robust varieties. As particularly vulnerable as the boxwood varieties are "blue Heinz" and "suffruticosa",
Fungal infection by the pathogen Cylindrocladium buxicola. Bright spores on the underside of leaves in boxwood.
Brown leaves and brown spots on boxwood
The pathogen Cylindrocladium In summer the opportunity to spread its spores quickly. In the humid morning there are numerous white spores on the lower leaf surface, while warm winds easily distribute the spores throughout the garden and in the neighborhood.
Remains the weather warm and humid, so more damage is expected because the infection of leaf wetness is bound because of wet leaves remain flying spores easily adhere. Where possible, beech trees should be protected from too much moisture.
A recognition of the fungal infection often falls lay not easy. A first symptom, besides the bright spurs on the underside of leaves, brown discolored foliage. Is this stage reached, only a radical pruning of diseased plant parts helps. This cut material does not belong to the compost heap and is disposed of in the residual waste. The same applies to fallen leaves, which has possibly been contaminated even the floor.
tip: Also remove the top layer of soil, since the fungus can survive for several years in the soil.
Misdiagnosis: boxwood cancer
In the diagnosis of fungal diseases a trained eye and experience are in demand, because often a alleged attack turns with Cylindrocladium buxicola as one of Volutella buxi Disease caused, which is also known as boxwood cancer. Here, too, there are initially pale green leaf discoloration that cause the death of shoots vital plants. You can recognize such an attack also on bright pink to apricot-colored spores covering on the underside of dead leaves.
Also, the fungus Fusarium buxicola can lead to similar symptoms, but he is rarely diagnosed.
fight boxwood fungus
In a fungus infestation, the entire hedge can be affected quickly.
Since hardly sufficiently effective preventive and curative preparations against fungal disease are known, different hygiene measures must be aware adhered to in order to minimize the infestation probability and duration. Even radical Roden may be indicated.
- Select robust varieties: More than most to the species Buxus sempervirens 'Suffruticosa' applies, but the fungus also occurs in other Buxus species. Resistant varieties have not yet grown.
In general, large-leaf varieties like "faulkner" but less susceptible to fungal attack.
- Only healthy plants Goods: Visibly diseased plants you should not buy principle. Look for discolored shoots and pale leaves.
- Avoid leaf wetness: Fungal infections require prolonged moisture and heat. Water therefore only at the plant basis - ideally early in the morning or at dusk.
- Remove diseased plant parts: Diseased plant parts are always removed together with the fallen foliage. The top layer of soil should be disposed of in this case likewise, since the pathogen can survive for several years in the soil. Cuttings and infested leaves do not belong to the compost.
- Cut diseased branches This less radical cutting measures can lead to success in the fast-growing and less susceptible varieties. But as often just above the soil even infection sites (discoloration) can be found on old wood, this possibility is ruled out often.
- strengthen resistance power of the plant: Existing boxwood stocks should be strengthened by a careful maintenance and regular fertilization.
- Disinfection and Cleanliness: All the equipment used and tools as well as shoes and hands must be thoroughly cleaned after use and disinfected, if possible, before further plantings are processed. This way, you prevent transmission of infectious spores to other plants and garden areas.
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Attack by the caterpillar of the Buchsbaumzünslers
Buchsbaumzünslerlarven form webs in the interior of the bush and eat the leaves and bark.
The cydalima perspectalis (Diaphania perspectalis) is an East Asian small butterfly, which was introduced in the last century to Europe. Its eggs the butterfly lays aware off of box trees - the larvae are therefore unwelcome pests that eat both the boxwood leaves and the bark of the plant. In this way the Buchsbaumzünslerlarven even China caterpillar threaten called private inventories and beech trees in public parks.
The caterpillars have a yellow-green-black-striped body color and can be up to five centimeters long. The pests begin in early spring with their feeding on many plant parts. If an infestation found necessary to act quickly because the pest increased rapidly forms several generations per year and can eat the bald boxwood in a short time. All plant parts above this pitting die.
tip: Typical of the caterpillars of the Buchsbaumzünslers is the formation of dense spun yarns inside the boxwood bushes. At least now you can find out the attack - but often it is then too late.
fight cydalima perspectalis
The cydalima perspectalis consciously seeks to beech trees to lay their eggs.
The effective control of the caterpillar is not easy. Since the pests are preferably work your way from the inside out, an infestation can often be detected only when the plant already destroyed or severely damaged.
Even with pesticides are difficult to catch Buchsbaumzünslerlarven. For large and leafy boxwood plants, it is difficult to wet the inner portion completely with pesticides. In addition, the dense web of caterpillar forms an additional obstacle.
As a first measure for the private garden is a Absammeln the track and removing the webs and nests infestation is recommended. Also check the undersides of leaves an infestation back and repeat the process over several days.
tip: A hard jet of water can help to flush caterpillars of the shoots. Also strong shaking can already help. Finally, the animals are destroyed or disposed of with household waste.
How to recognize the caterpillar of the Buchsbaumzünslers?
The caterpillars eat the leaves of Buchsbaumzünslers and bark of the plant.
The caterpillars of the Buchsbaumzünslers are well camouflaged on the evergreen shrubs: With its green body color and the black dots are difficult to detect. Depending on age caterpillar between nine millimeters and six centimeters in size. Often the pest sits between and among the leaves.
At first the caterpillar of the Buchsbaumzünslers weaves together larger leaves and smaller branches later she considers herself temporarily in a homespun sack. In this state, the caterpillar into cocoons, which run through the entire boxwood hidden.
A few days after pupation slip the bright butterflies. The white wings of the adult moth have a wide black border. Later, the cydalima perspectalis lays its eggs aware of a boxwood plant from - here then slips the next generation caterpillars.
Frequently Buchsbaumzünslerfalter be spotted in gardens and public parks until well into December. A butterfly can thereby produce up to four generations per year.
Boxwood psyllids infested trees book after shooting
Shortly after shooting occur most frequently boxwood larvae of boxwood leaf Flea, experts speak of Psylla buxi on. The infestation occurs primarily at the shoot tips. The adult, winged psyllids appear from late May to early June. The pests eventually suck the leaves, whereby this curve spoon-like. In addition, the larvae excrete white, cotton-like wax threads, which later disfigure the shoot tips. In heavy infestations can also settle on the infested by the larvae leaves black Rußtaupilze.
A combat boxwood leaf flea is with pesticides that exist in the garden retailers, possible but usually not necessary. A light pruning of the shoots also reduced the infestation.
cut book only with sharp blades
Boxwood are particularly suitable as topiaries.
For optimal plant health and a nice growth targeted cutting measures throughout the year provide distributed. Shorten in early summer fresh Neuaustriebe and fall again, the tips of the book tree. In between was only as needed, but will never be radically shortened.
Also, be aware at cutting measures at a sufficiently sharp tool: the tender leaves may werder squeezed be demolished. At these sites of injury, the drives are significantly more susceptible to pathogens, fungal spores and pests. Likewise, the tool must be clean, ideally even be disinfected as boxwoods are quickly infected by harmful bacteria.
Perform cutting measures also on a mild day without rain through. Too much sunshine fresh cut could turn brown, while too much moisture promotes fungus.
If you want to give your boxwood a special appearance, you can freely choose different forms and shapes. ideal for novice home gardeners is the classic spherical shape. Such shaped sections can be corrected throughout the year and are aesthetically unattractive in the entrance area. In the garden, unnatural shape for coherent focal point.
Freehand cut sculptures already require more experience. Is particularly easy with special guiding aids, such as strips of wood for a pyramid or stencils made of wire mesh. The different templates are simply placed over the book and pretend where cuts. Renewable or protruding branches and leaves can then be cut off along the preset.
tip: The earlier the topiary, the better. Then the plant can develop a nice dense growth over time.
Between March and May, the book tree blossoms.
The boxwood or book (B. sempervirens), also known as Buxus, is an ancient garden plant that is widely used in Southern and Central Europe. The book counts as evergreen of the most popular garden plants and is now available in a wide range of varieties for the private garden. The diminutive breeding "suffruticosa" For example, an ideal edging plant and thrives as a ball guide in a pot on the balcony well.
In most gardens are found boxwood as a small hedge (discount limit) for a natural screen or as consciously placed solitary plant. Boxwoods make no special demands on the soil, but prefer moist sites with loose, calcareous soils and tolerate sun just as well as shade. Since the boxwood can grow up to two meters high and wide, he is enormous cuttable and is an excellent topiaries.
Box trees are propagated by cuttings in late summer.
Paper can draw itself. It is generally the guiding principle that boxwood branches take root only in the calendar months that a "r" contain. Especially good planting time is the late summer. are now final cut measures of hibernation, and the book can be propagated by cuttings.
Cut some branches for this purpose with a length of around 10 cm from the bush and remove the leaves at the end of the style. Place the cuttings in connection in a large enough container with fresh flower or compost, press firmly all and water At sufficient.
tip: According to an old folk belief bear fruit trees near Buchs particularly large fruits.
Alternatives to Boxwood
Beech trees are extremely compatible cut grow densely branched and form fine green leaves. Nevertheless, the book balls are very susceptible to diseases and pests. Therefore, many gardeners choose to care for lighter alternatives that resemble the boxwood visually and in their care.
Particularly useful is the sort Dark Green of the Japanese sleeve (Ilex crenata). The thornless plant thrives in the shade and in the sun and is hardy. Waterlogging must be avoided, however, so heavy soils should be treated with sand and mature compost before planting. is similar to boxwood also the Tatra daphne (Daphne arbuscula), which because of its low growth is also well suited for bed enclosure or as a ground cover. In addition, the daphne is in April and again in Spätsommer violette flowers that attract beneficial insects with their pleasant fragrance in the garden. If you are looking for a low-maintenance evergreen conifer, you can click the diminutive species mecki the plant family of Thuja (Thuja occidentalis) fall back on. The fragrant needles also keep in winter its dark color, so the little shrub is an eye-catcher.