Stem of dead birch showing damage pattern from Scolytus ratzeburgii 3.jpg
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Stem of dead birch showing damage pattern from Scolytus ratzeburgii 3, Diseases and disorders of Betula, Scolytinae galleries in wood, Scolytus ratzeburgii
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Scolytus ratzeburgii 3 の損傷パターンを示す死牛の列、木材中のScolytinaeギャラリー、Scolytus ratzeburgiiの病気と障害
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scolytus bark beetle