Conclusion The changes of ash bark bacteriostasis were basically identical with known coumarin component content.

结论秦皮抑菌强弱与已知香豆素成分含量高低基本一致。

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D-shaped holes in the bark or new tree shoots emerging at the root zone of your ash trees may be a sign of infestation by the Emerald Ash Borer, an insect native to the Far East that targets ash trees, says Dave Dailey of Birchcrest Tree and Landscape, in Rochester, N.

WSJ: Getting to the Roots of Your Trees' Stress

Officials are planning future beetle surveys and will try to limit the infestation with "girdling, " in which thick strips of bark are removed from around infested ash trees.

WSJ: Mass. creates quarantine zone to contain insect