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林业科学 ›› 1996, Vol. 32 ›› Issue (1): 44-49.

• 论文及研究报告 • 上一篇    下一篇

古柏赤枯病病原茵的研究

雷增普1,丛生2,杨永胜3   

  1. 1. 北京林业大学 北京 100083
    2. 北海公园 北京 100023
    3. 西安园林局 西安 710032
  • 收稿日期:1994-09-01 出版日期:1996-01-25 发布日期:1996-01-25

STUDY ON THE RED BLIGHT OF OLD JUNIPER CAUSED BY ALTERNARIA TENUIS NEES

Zengpu Lei1,Sheng Cong2,Yongsheng Yang3   

  1. 1. Beijing Forestry University Beijing 100083
    2. Beihai Park Beijing 100023
    3. Garctens Office of Xian City Xian 710032
  • Received:1994-09-01 Online:1996-01-25 Published:1996-01-25

摘要:

经Koch's法则检验证明,Alternaria tenuis Nees(细链格孢霉)是北京地区古柏赤枯病的病原菌。它引起古柏针叶及嫩梢的大量死亡。2-3年生桧柏及侧柏苗经人工接种证明,该病菌有较强的致病力,它还侵染某些种类的杨树。该病潜育期为5-6天。对病菌生物学特性也作了研究。病原菌生长和孢子萌发最适温度为25℃;相对湿度在90%以上;最适pH值为6;葡萄糖、淀粉、蛋白胨、谷氨酸为该菌纯培养的优良营养源。

关键词: 古柏, 赤枯病, 病原菌, 生物学特性

Abstract:

The pathogen has been examined by Koch's postulates as Alternaria tenuis Nees of red blight of old juniper. It caused a lot of blight needles and tender shoots to die down after artificial inoculation to the seedlings of 2-3 years Sabina chinesis and Platycladus orienta, it was proved that pathogen has very high pathogenicity to the host plants, it also infects some varietis of poplar. Incubation period of the disease is 5-6 days. Some researches on the biological characteritics of the pathogen was also done. The optimum temperature and relative humidity for spores geminetion and hyphae growth are about 25℃ and 90%. The optimum pH value for hyphae growth is 6.Glucose, starch, tryptone. Glutamic acid are good C and N sources in axenic culture of the pathogen.

Key words: Old jumiper, Red blight, Pathogen, Biolobical characteritics