Abstract
An assessment was conducted on the health of dark coniferous stands in the Biryusinskoe forestry. The study is of great significance in light of the environmental degradation caused by the invasive four-eyed fir bark beetle (Polygraphus proximus Blandford). The findings revealed that the firdominated stands are severely weakened or dying in the study area. The decline and dieback of fir stands are primarily caused by the invasive foureyed fir bark beetle and other negative impacts. The text discusses the main factors contributing to this issue. The data obtained indicate that Alekseev's method of assessing forest health provides a more detailed and accurate description of the state of forests.
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