Bark Necrosis (BN) now affects most modern rubber plantations worldwide, with a wide range of severity across sites depending on the clone, the age of the trees, the site and the country.
树皮坏死(BN)目前危害了世界大部分胶园，胶园受害严重度取决于橡胶品种、树龄、种植地和种植地区。
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The controversial polymorphism of bark syndromes was recently settled thanks to surveys made in a large number of rubber plantations.