We can see the many pests of trees and shrubs during a careful examination of the garden. But often the problem becomes noticeable only at a late stage, when it is to difficult to resist it. It will be easier to carry out the regular preventive measures so that ti prevent the disease.To do this the best in the spring, when the kidneys don’t bloom yet on the trees. At first you should to rake the last year’s leaves, burn it, or to take it off from the area. These activities we can do also in the autumn before the falling of snow. The importance of the cleaning last year’s leaves is that it can collect the pests, which will overwinter there. You also need to dig the soil in the tree trunks. Some pests can winter in the soil surrounding the tree trunks. You must make the carefully dig in these places and try not to damage the roots of plants. This concerns the fir, which has a surface root system. Near the tree trunks of this plant can be fir pests. In the spring you must clean the trunks and large branches of lichens and mosses which grown on them. Of course, they do not make themselves a threat to the plant, but they are dangerous because they accumulate the moisture for the reproduction of bacterium and fungus. The riding of moss and lichen you should do with using a brush dipped in a solution of iron or copper sulfate. Do not forget about the sanitary cutting, we need to get rid of dead branches (even if they have no the signs of pests). We must cut not only part of the dry branches, but also rid the healthy (about 3 cm). If you get cut in diameter more than 1 cm, you should disinfect it, and cover up. All the cut branches we must destroy. All these preventive measures can help to save the trees and shrubs from many diseases and prolong the life of the plants.