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Our changeable world threatens the life of organisms in the nature. To survive, the populations of organisms have to change adequately. They need freedom for adaptive actions. The adaptability gives populations a chance to survive. Man-made forest plantings of the Central Russian Upland do not provide for their forest components the possibility of self-control as they are homogeneous and are the prerequisite for inharmonious development of biota, for the excessive development of some parasitic for forest trees species. Such plantings become the real "kingdom" of forest trees parasitic fungi and insects. Global warming and a wrong human activity can worsen health of the forests even more. A natural renewal in these forest plantings is impossible. The purpose of this work is to promote the natural biotic self-control of pathogenic processes and self-regeneration in forest ecosystems and to exclude thanks to it the need of use of both chemical and biological pesticides for forest protection. One of the key positions of a self-regulation of pathogenesis is inbreeding in populations of parasitic organisms. The self-control in forest plantings is achieved through forming of mosaic highly heterogeneous forest ecosystems. Functionally such plantings are close to the natural woods. Such plantings must be created. It's necessary to understand that the solution of environmental issues has to correspond not only to local, but also global interests.

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Abstract:Forests life depends in many respects from specific of mankind activity. Adverse aspect is destruction and degradation of the natural old-growth woods. The woods have been ruthlessly affected by humans. The man-made forests usually have the low level of heterogeneity and are object of mass attacks of harmful organisms. The purpose of this work is to prove formation of the forest ecosystems capable to spontaneous development, to biotic self-control. Spontaneous development is a basis of free choice of the Nature and a rather high level of heterogeneity of created plantings. It is desirable. Long-term researches were carried out in the conditions of the Central Russian Upland. Results of experimental forest works of 1936 are considered. The methodology of researches was based on the comparison of a condition of viability of forest stands and natural renewal in plantings, various on heterogeneity level. Level of heterogeneity of mosaic forest ecosystems at which spontaneous development conducting to biotic self-control of species communities and maintenance of biotic systems is reached, was as a result of researches established. Equability of man-made forests is thus to almost necessary level reached.

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