Abstract
Outbreaks of Ips typographus (L.) caused by catastrophic natural phenomena in Central Europe, Siberia and the Far East have been the subject of numerous scientific studies. Molecular methods were used to analyze the relationships and origin of Ips species. The review article shows in detail the biological characteristics of I. typographus, such as the effect of temperature on vital parameters and flight behavior. It was found that the spruce bark beetle disperses within 500 m. However, new attacks occur in the immediate vicinity of the old foci. The susceptibility and protection mechanisms of trees are critical to a successful bark beetle attack. The newly attacked trees react with preformed resin, reactions to wounds, and, ultimately, systemic changes in physiology. The risk assessment in the studies was carried out both at the tree level and at the forest level as a whole. The risk of an attack of I. typographus is associated with the growth of the forest in a particular area, age, the flow of nutrients and water to the tree. The dynamics of outbreaks, to a large extent, depend on the abundance of I. typographus, susceptibility of trees, weather conditions and phytosanitary measures. Bark beetle I. typographus is an integral component of any forest ecosystem. It colonizes weakened, weak or dead trees, and thus begins the decomposition of bark and wood. This pest is able to use short-lived resources and quickly multiply to extremely large numbers, for example, after winds. In such epidemic situations, I. typographus can pose a serious threat to spruce-rich forests, especially for stands planted outside their optimal range. The spatial development of I. typographus infections can be analyzed using GIS and multiple regression methods to investigate potential correlations between climatic, specific and phytosanitary factors and infection dynamics. Also, the article discusses various methods of forest control and emphasizes the need for more sophisticated risk assessment tools.
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