| 1. | The living sapwood is very thin ( 5 20 cm ).
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| 2. | Wide pale yellow-brown sapwood is clearly demarcated from heartwood.
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| 3. | The newest growth ring in a tree is called the sapwood layer.
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| 4. | All wood in a tree is first formed as sapwood.
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| 5. | This may or may not correspond to heartwood and sapwood.
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| 6. | The sapwood is white, and the heartwood is pink.
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| 7. | The sapwood is usually not attacked by the lyctus borer.
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| 8. | There is little difference between the heartwood and the sapwood.
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| 9. | The larvae thrive in the inner bark which is rich in sapwood.
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| 10. | It kills these trees by directly growing into and killing older sapwood.
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