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据普查,云杉落针病在阿坝林区发生较普遍,危害林木严重,全州发生面积501812亩,其中金川、马尔康、黑水、理县、松潘发生较严重.如金川发生面积6874亩,林木受害株率73%,感病指数为34%;黑水县发生面积4874亩,林水受害林率80—100%,感病指数36—67%.为控制病情的发生发展,给防治提供资料,我们对云杉落针病进行了观察.
According to the census, the disease occurred more frequently in Aba Forest District, which threatened the forest seriously, with an area of 501,812 mu in Jinzhou, of which Jinchuan, Malcolm, Heishui, Li County and Songpan occurred more seriously, for example, 6874 mu of Jinchuan occurred, Tree damage rate of 73%, susceptibility index of 34%; Heishui County area of 4874 acres, forest damage rate of 80-100%, susceptibility index 36-67% .In order to control the occurrence of disease development, to provide prevention and treatment Data, we observed the needle drop disease.