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近年来,野火病在云南各烟区普遍发生,逐渐成为云南的主要病害之一。此病在曲靖地区尤其严重,据1986年调查,该地区所属8县1市的烟田均大量发生野火病。师宗、罗平、陆良和富源等县,平均发病率达70.4%,病情指数为28.6。国内外的生产实践证明,要从根本上防治烟草病害,关键是选用抗病品种。为此,1987年开展了烟草品种对野火病的抗性鉴定,以筛选抗源,为培育抗病品种服务。一、材料和方法1987年6月在曲靖麻黄乡的红花大金元烟田中,采典型的野火病标本进行单病斑分离,选单菌落转移在肉汁胨培养基上繁殖。培养3
In recent years, wildfire has generally occurred in all tobacco-producing areas in Yunnan Province and has gradually become one of the major diseases in Yunnan. The disease is especially serious in Qujing. According to a survey conducted in 1986, a large number of wildfire occurred in the tobacco fields of 8 counties and 1 city in the area. Shizong, Luo Ping, Luliang and Fuyuan counties, the average incidence rate of 70.4%, disease index was 28.6. Production practice at home and abroad proves that to fundamentally prevent tobacco diseases, the key is to use resistant varieties. To this end, in 1987 to carry out the identification of varieties of wildfire resistance to fire, to screen the source of resistance, to cultivate resistant varieties of services. I. Materials and Methods In 1987 June in Quhuang Mahuang safflower Taijinyuan tobacco fields, the typical wildfire specimens collected single spot separation, the single colony colonization in the peptone medium propagation. Cultivate 3