Coniferous plants do not lose their attractiveness for a long time and can be pleasing for many years with their appearance, located throughout the summer cottage. Such plants can be not only a decoration of the territory, but also an excellent material for creating all kinds of wood compositions. Such trees are distinguished by longevity and uniform appearance all year round, but like other plants, they can suffer from pests and various diseases.
In order to keep the plants healthy, they need proper care and some knowledge that will help to recognize or even prevent the occurrence of the disease. There are plenty of similar diseases and every coniferous plant, whether it be pine, spruce or thuja, can suffer from it.
Schütte coniferous diseases
Gray mold disease
Such a disease of coniferous plants as gray mold most often affects young plants, or rather, their aerial parts. This disease occurs in dense parks and forest belts, in groomed nurseries, where the trees grow very densely and poorly ventilated. Also, the disease can be caused by insufficient lighting. It manifests itself quite simply - with affected shoots, which are covered with a kind of gray-brown bloom.
This disease of coniferous plants is fungal. Basically, the disease is manifested by darkening of the needles and its premature fall. Mostly young, immature plants, which quite often die, are affected. The disease is active year-round and, starting with spring bloom on needles, but continues until late autumn, when it covers the needles with brown spots and gradually grows. The disease continues to live even on the needles that showered on the ground..
The disease is caused by the same fungus, Lophodermium seditiosum. It is accompanied by a change in the color of the needles, which turns yellow during the year, then takes a brighter color and falls off. In the process of the disease, the needles can grow over the body of the fungus. At this moment, thin, transverse lines appear on the needles, which grow very quickly throughout the tree. The disease develops very quickly in warm and moderate conditions: average temperature, sunny weather, rain, dew. The disease affects young and immature plants, both in nurseries and on the open ground.
Fungus disease Phlacidium infestans, affecting, most often, different types of pine. It develops under snow cover and can lead normal life activity even at temperatures below zero degrees. In the spring, when the snow melts, the mushroom begins to grow more intensively, and every moment it captures the next needle. The needles are getting dark, gradually changing color to brown, becoming very fragile.
Brown shute is also a fairly well-known fungal disease of conifers. It is most common among trees such as fir, pine, spruce, cedar, juniper. Most often, brown shute affects young plants in nurseries or self-seeding on open ground. The cause of the development of the Herpotrichia nigra fungus is the weakness of a young plant. Infection occurs with bagpores, immediately after the snow melts. The needles are dark, dead, covered with a webbing coating. During the spring and summer, the plant weakens, the needles of the whole plant become diseased and thin branches begin to die. This disease develops well in conditions of high humidity and shade, as well as in unrefined forests and forest belts.
The disease is very similar to those described above. The first signs appear in the spring, affecting the needles of the plant with the fungus Lophodermium juniperinum. Gray, black, yellow, bright brown, it is quite different, depending on the region, and the whole summer the disease develops on the plant. Further, the plant is overgrown with mushrooms, the size of which reaches 1.5 mm. They survive even at low temperatures. This disease, under conditions of heat and humidity, can completely kill the plant.
How to protect pine trees and other plants from Schütte diseases
In fact, drugs for these diseases are available, there are various ways of prevention. which allow you to keep the plant healthy throughout life. The first protective measures against shute are the selection of the correct and initially healthy planting material. It should be prepared for a certain region, correctly grown and well-groomed, that is, a young plant should already be strong. We would like to note and recall the fact that plants are most susceptible to shute diseases in the shade, in a humid environment, for example, in dense forests during snow melt. If you want to avoid such diseases, then the first prevention will be the correct, uniform planting of conifers in the territory, as well as timely care. It is necessary to apply and spraying plants with preparations that contain sulfur or copper - Abiga-Peak, Bordeaux mixture, HOM or, in general, calcareous broth. Means must be applied in the spring and be sure to repeat the spraying in the summer, if suddenly the disease manifests itself.
Coniferous tree diseases
Coniferous rust diseases
In this section of the article, we will consider a special series of diseases of conifers. They are caused basidiomycota mushroomsthat hit the bark of shoots and needles. The disease is quite contagious and can spread quickly even to other plants.
Spruce spruce or rust cones
This disease occurs on fir trees thanks to bird cherry, it is she who is the legislator of the disease. It develops on the inside of the cones, more precisely on the scales, forming dusty areas of dark brown color. Ill cones lose fertility, but can remain on the tree for up to several years. During the disease, young shoots can change shape, fall off the needles.
The disease is caused by a mixed fungus Melampsora pinitorqua and is developing quite quickly. Passing the special stage, pine shoots bend, and the apex completely dies.
Rust is found in almost all species of conifers. Its classical nature, development takes place in a specific, warm and humid environment. The disease affects the needles of trees and the plant loses its decorative appearance. Sometimes, when mixed with other diseases, the needles rust can lead to the death of the plant.
General recommendations for the care of conifers
Treatment and prevention of rust diseases of trees
Experts recommend the following activities. Plants need to be isolated from the affected specimens. Young conifers should not be grown next to possible pathogens or carriers of diseases. If the disease already occurs, then the affected areas must be cut and destroyed. The resistance of coniferous plants to rust diseases can be increased by the action of special immunostimulants or micronutrient fertilizers. Spraying conifers during the growing season with aqueous suspensions is also recommended. It can be a Bordeaux mixture, copper oxychloride, Privent, Abiga Peak. Spraying in the autumn period, when the drug should not only fall on the plant, but also on its discarded needles, as a source of a contagious infection, will not hurt.
In fact, there are more diseases of conifers and their pathogens than are generally possible to list. Often there is a cross-section of diseases when a tree or bush suffers several diseases at once, and in order to return a plant to life, it is necessary not only to treat it, but also initially determine the disease or their complex so as not to be mistaken with the drugs. Fortunately, now on sale there is everything that is needed for this. But there are other recommendations that state that in order for the plants on the plot to be healthy, it is necessary to carry out prophylaxis, rather than treat already diseased plants, and the first thing to start with is healthy planting material. Only if you buy strong seedlings, immediately treat them with prophylactic agents, plant them in the prepared soil and then, throughout the entire growth of coniferous trees or shrubs, will you properly care for them, fertilize the soil, provide it with watering or drying, and sprinkling and so on, you can enjoy the majestic, coniferous garden. If not, then believe me, in the future plants are expected and needles rust, and root rot, and drying out of the root system, which will be difficult to deal with and, ultimately, quite expensive.