The article presents the results of three-year research of withering pine stands in Polissya. Typical trends of the distribution of current sharp withering are described, depending on the taxation characteristics of forests. It was discovered that the pine trees large-scale withering up to the medieval woodlands, with one species in composition, high classes of quality of locality, with low density, growing in the optimal and most common for this wood species types of forest conditions – fresh and moist subor. Attention is accented, that in 2017, the displacement of the range of damage was recorded in the direction of other age groups, high-density forest stands, etc. It diagnosing in the pine forests the distribution of aggressive xylophages associations and ophiostamoid fungi causing rapid large-scale withering of stands. It is noted that the main agent of the defeat – apical bark beetle (Ips acuminatus Gyll.). Has changed the way of attack on the concentrated, which leads to the defeat of the most liveliest trees and the formation of the immediately burial and large-sized sources of reproduction of beetles. Conclusion is made on the further development of the withering of xylophago-ophiostamoid origin. It is expected that during the year the area of affected forests will increase by 2.5-3 times. In the long run, the cardinal change in the age structure of the Polissya pine forest and their species transformation is projected.
apical bark beetle (Ips acuminatus Gyll.), withering of stands, xylophages, ophiostamoid fungi, pathological processes of forest, common pine (Scots)