调查结果表明，承德避署山庄及其周边地区的油松针叶大量枯黄，侧枝枯死或整树枯死是由于松大蚜的严重危害所致。
The result showed that the yellow and withered pine needles of Pinus tabulaeformis were caused by the serious damage of Cinara pinitabulaeformis Zhang et Zhang.
调查结果表明，承德避署山庄及其周边地区的油松针叶大量枯黄，侧枝枯死或整树枯死是由于松大蚜的严重危害所致。
The result showed that the yellow and withered pine needles of Pinus tabulaeformis were caused by the serious damage of Cinara pinitabulaeformis Zhang et Zhang.
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