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阐述了杜松赤枯病病原菌的研究结果 ,研究表明交链孢 (Alternariasp )和茎点霉 (Phomasp )是杜松赤枯病的主要致病真菌 ;两种病原菌均喜偏酸性的条件 ,菌丝生长发育的适宜pH值是 5～ 7;菌丝生长的适宜温度是 2 0～ 30℃ ,孢子萌发的适宜温度是 15～ 2 5℃ ,2 0℃时萌发率最高 ;Al ternariasp 在相对湿度 90 %以上能较好萌发 ,Phomasp 在湿度 10 0 %时才能萌发 ,在水滴中萌发率最高 ;两种病原菌对云杉和丹东桧的嫩枝叶也有较强的致病性
The results of the research on the pathogen of Juniper blight were described. The results showed that Alternariasp and Phomasp were the main pathogenic fungi of Juniper berry blight. Both pathogens were happy and acidic. The suitable pH value for growth and development of silk was 5 ~ 7. The optimal temperature for mycelial growth was 20 ~ 30 ℃, the optimum temperature for spore germination was 15 ~ 25 ℃, and the germination rate was the highest at 20 ℃. More than 90% can germinate well. Phomasp germinates at 100% humidity and has the highest germination rate in water droplets. The two pathogens also have strong pathogenicity on shoots and leaves of spruce and Dandong juniper