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昆明市海口林场中心街苗圃和白塔村苗圃的杉木、华山松幼苗期病害发生普遍,为害严重,尤其是在幼苗出土后1—2月内,受害更为突出。其发病症状为猝倒型和立枯型,由于发病时间和危害部位的不同,其病害类型则不同,中心街苗圃杉木苗上,兼有猝倒型及立枯型,以猝倒型为主;白塔村苗圃华山松苗上以立枯型为主,兼有猝倒型。杉木苗于二月二十八日播种,三月十二日开始出苗,三月二十二日开始发病,到四月中旬发病比较普遍,五月中旬为发
Seedlings of Chinese fir and Pinus armandii in seedling stage of Haikou Forest Farm Center Street nursery and Baita Village were common and serious damage, especially in 1-2 months after the seedlings were excavated. The incidence of symptoms of cataplexy type and vertical dead type, due to the onset of time and the different parts of the damage, the types of diseases are different, Center Street nursery fir seedlings, both cataplexy type and vertical dry type, cataplexy-based ; Baita village nursery Huashan pine seedlings mainly to stand dry type, both catapults. Chinese fir seedlings are planted on February 28, germinated on March 12, and started to develop on March 22. The onset of the disease is relatively common in mid-April and mid-May