Boxwood diseases correctly recognize toom baumarkt

The popular evergreen shrub already adorned garden beds in ancient Rome. Often enclosed them in the form of low hedges. Even in our country, boxwood is still native to many gardens. Boxwood grows slowly and can reach a height of up to eight meters (m) in our latitudes. In its original home, subtropical regions, it even grows up to 20 m high. A Careful maintenance makes boxwood, like all plants, more resistant to disease and pests – this includes regular Pruning. However, not all adversity can be avoided with good care alone.

Your boxwood turns brown or yellow? Here you can find out which diseases you should protect yourself against if you have a boxwood borer infestation Planting boxwood, you should also expect that the plant will eventually get sick. We name the typical symptoms, Which you should be on the lookout for to detect boxwood diseases in time and save your boxwood. You should also consider planting a Build an insect hotel, at Beneficial insects attract some pests that decimate naturally. Prevention of this kind is one of the most environmentally friendly and efficient methods of.

Boxwood borer

Boxwood diseases correctly recognize toom baumarkt

Cydalima perspectalis, the so-called boxwood borer, is not strictly speaking one of the boxwood diseases. It is the food preferences of its Larvae, which damage the plant, make it sick and, depending on the infestation, destroy either individual shoots or even entire stands. The voracious caterpillars of the East Asian small butterfly are among the most unpleasant pests that can infest boxwood: They prefer to feed on the leaves and bark of the plant, leaving behind bare leaf veins and Leaf stalks with dried, light yellow leaf remnants. In case of heavy pest infestation, the plant is also covered extensively with the typical web of the caterpillars. A single caterpillar destroys about 45 leaves.

Since 2012, the boxwood borer is primarily found in southern German regions and continues to spread from there. Unfortunately, the infestation is often only noticed when the first damage to the plants is already visible. We therefore devote ourselves to the pest in detail In a separate guide, in which we tell you how to recognize an infestation at an early stage, how to prevent it specifically, and how to Fight boxwood borer can, if it has taken up residence in your garden.

Boxwood gall midge

Like the boxwood borer, Monarthropalpus buxi also plagues the native boxwood already in the larval stage. The perfidious thing about it: the pests remain undetected for a long time, because they are located inside the leaves. In late summer or early fall, the following symptoms appear yellow spots with a black center on the upper side of the leaves, which are often mistaken for fungal infestation. On the underside regular blisters. The young gall midge hatch in May at the earliest. So with a timely pruning of the plant you can remedy the situation. If too many leaves are already affected, the boxwood will drop leaves; as a result, entire shoots may dry out.

Shoot tip gall midge

Aceria unguiculata prefers to suck on the leaves near the shoot tips and causes damage there. If the leaves become deformed, by curl and blistering, the shoot spike midge lives up to its name. The buds of the shoots can be Galls form. These are spherical growths, which are also called gall apples, cecids or simply plant galls. The shoot tips can die in case of heavy infestation.

Boxwood spider mite

Eurytetranychus buxi is also an immigrant – this time from the dry and warm zones of North America. Due to this climatic preference, the boxwood spider mite is practically only a problem in very hot summers. The mite overwinters in an egg on the underside of the leaf and, after hatching, causes damage to the upper and underside of the leaves by sucking. You can recognize their activity by streaky, yellowish-white brightenings or speckles on the foliage, on which later blisters are formed. If you also have a fine gossamer If you see spider threads on the branches, you have to ame a heavy infestation. Dropped leaves are another indicator.

Boxwood leaf flea

correctly recognize boxwood diseases toom baumarkt

Psylla buxi, the so-called boxwood leaf flea, is also a pest that likes to visit the boxwood to suck on the leaves and feast on the plant sap. It occurs mainly when the plants sprout in the spring. Do leaves arch up in the shape of spoons? Cripple the tips of the shoots cabbage-like? Then probably the boxwood leaf flea is a guest. If the leaves also feel sticky, this is another indicator. Caused by the waxy excretions of the pest. Is there also a black coating on the leaves, these are usually sooty fungi. They especially like to grow on the excretions of the flea.

"Rust" on the boxwood

If box leaves turn orange, this can indicate an undersupply of nitrogen. This phenomenon often occurs in the cold season of the year. The actual box tree rust (Puccinia buxi), however, is fungal, it is found on brown rust pustules recognizable, which can appear on both sides of the leaves. The leaf fall typical for rust fungi usually hardly or not at all occurs on boxwoods.

Boxwood canker

Form on the leaves Pink pustules? twisting of the leaves and they attach themselves to the twigs before they turn brown and fall off? If whole branches dry up? Then your box probably suffers from Volutella buxi – the so-called box canker, which is also called Volutella branch dieback. Plants that are already weakened by pests and/or diseases are particularly susceptible to this disease.

Shoot dieback

The so-called boxwood shoot dieback (Cylindrocladium buxicola) usually occurs in late summer or early spring Fungal diseases back. At first, dark brown or white spots appear grayish brown to orange-brown spots on the leaves, which quickly grow larger. On the underside of the leaf a Coating of white spores. In the course of the disease, dark stripes form lengthwise on the shoots. The affected leaves fall off. Northern regions seem to be more affected than southern ones, because the fungus tolerates higher temperatures (30°C and above) poorly. The pathogen spreads epidemically, especially in warm, humid summers (the optimal temperature for fungal growth is 20-25°C).

Infection occurs when the leaves are continuously wet for at least five hours, then the fungal spores can penetrate the thick wax layer of the evergreen leaves and infect the plant. The first dark brown leaf spots then quickly become larger and the whole plant turns brown. Since the fungus forms permanent spores in the soil that remain infectious for several years, diseased plants and also fallen leaves as well as the top layer of soil should be removed. In addition, because of the risk of re-infection, it is advisable to avoid other types of plants (such as e.g.B. Taxus and dwarf gilex) to be replanted. Further information on Preventing boxwood shoot dieback you can take from our box tree guide.

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