There are decline and decling diseases in pure Armand pine forest in Yunnan. The happening and appearence are basically accordant with the reports and study results of that of the decline of needdle and broad-leaved trees abroad.

• 云南华山松人工纯林存在衰退现象和衰退病 ；其发生和表现与国外其它针、阔叶树衰退病研究结果的报道基本吻合 .