Disease trees - a terrible dream of every gardener. They are able to cause great damage to the crop or completely destroy it. In this case, all the efforts of a person are reduced to zero.
To protect against such diseases, and help your plantings in time, you need to know the symptoms of the disease and its weak points.
Next, we find out: what is a scab on a pear, how to treat it, what preventive measures are needed and see in the photo how this disease manifests itself.
What is scab?
Scab - common fungal infection of pears and apples.
However, besides them, it easily affects other fruit trees.
It is so common that there are practically no areas where this disease is absent.
It is caused by the fungus Venturia pirina Aderh, which specifically affects the pear.
The apple tree also suffers from this disease, but the causative agent is another fungus.
The danger is that it can completely destroy the crop.
Symptoms
For the early diagnosis of plant diseases, it is important to know their symptoms. The disease on a pear has clear, isolated from other diseases, manifestations, not only on the leaves of the tree, but also on the pears themselves. It can be determined with high probability correctly.
For example:
brown spots on the fruit. The first manifestation of the disease, visible to the eye;- green spots with an olive tinge on the sheets. At first, such spots are not very noticeable, but with the development of the disease, they darken and turn brown;
- the affected fruits cease to develop, acquire a strange, unaesthetic form;
- any infected parts of the tree fall: leaves, fruits, ovaries, etc.
brown spots on the fruit. The first manifestation of the disease, visible to the eye;Further in the article photo and treatment of such a disease.
A photo
How to get rid of the disease?
Combating any plant disease requires comprehensive measures. It is important to combine all methods of struggle, otherwise the disease will continue to spread.
So how to get rid of scab on a pear?
Among the most effective ways:
Spraying In the fight against virtually any disease of trees, this method is the most correct. Spraying is carried out necessarily several times a year. Good results gives spraying of blue vitriol, as well as combining it with lime.Also, alternate spraying copper sulphate and bordeaux liquid proved its worth in the fight against this scourge. You can replace the Bordeaux mixture on copper chlorine or colloidal sulfur;- regular cutting and destruction of infected parts of the tree, especially young shoots;
- destruction of infected fruit.
Spraying In the fight against virtually any disease of trees, this method is the most correct. Spraying is carried out necessarily several times a year. Good results gives spraying of blue vitriol, as well as combining it with lime.Also, alternate spraying copper sulphate and bordeaux liquid proved its worth in the fight against this scourge. You can replace the Bordeaux mixture on copper chlorine or colloidal sulfur;The combination of prevention and control measures gives good results. A disease is always easier to prevent than to cure. It is important, before planting trees or detecting the first symptoms of the disease, to remember about its threat.
Learn about other, no less dangerous for the garden, diseases: Pear rust, Bacterial burn, Anthracnose, Chlorosis, Bacteriosis, Bacterial cancer of grapes.
When to do processing?
Special attention to the gardener should be paid to the processing schedule of trees. Spraying is carried out several times a year, depending on the weather and the degree of infection of the plants.
The most severe development of the disease requires about 5 procedures per year:
the first spraying - in the period of formation and swelling of the kidneys. Most often, it is carried out by blue vitriol;- the second is during the period of bud formation. Suitable fungicide;
- the third spraying is carried out after completion of flowering. It is advisable to treat again with a fungicide;
- quadruple - 2 weeks after the previous one;
- the fifth spraying is carried out on winter trees in the late summer - early autumn.
the first spraying - in the period of formation and swelling of the kidneys. Most often, it is carried out by blue vitriol;It is important to remember that the alternation of drugs of different directions gives a good result in the fight against the disease. It is inefficient to use the same throughout the entire treatment period.
Disease prevention
Prevention should be carried out long before planting trees. The probability of the disease depends on the choice of the place of the future planting.
Among the main preventive measures:
- careful selection of the site for the future garden;
- observance of planting density. The thicker the trees are planted, the greater the likelihood of the disease spreading;
- collection of fallen leaves. The disease is experiencing winter in the fallen leaves, so they must be destroyed;
- spraying pear trees with Bordeaux mixture or copper chlorine;
- proper full fertilization of the soil.
Already in the autumn, after the harvest, you need to start fighting. The first spraying for prophylaxis is carried out immediately after the final harvest.
The weather should ideally be windless, dry. If it has rained after spraying, it is worth repeating it by choosing a sunny day.
Thus, pear scab is a disease that covers vast areas. It is dangerous for all gardeners, because able to completely destroy the crop.
The disease will recede only if to influence it with therapeutic and prophylactic measures. At observance of all rules of processing of trees, constant care for them, any disease will disappear, and the pear harvest will be rich.
Watch the video where you see a pear infected with a scab and immune to it.
