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玉米丝黑穗病[Sphacelotheca reiliana(K(?)ehn) Clint.],在我国春玉米区发生普遍,在昭通地区,除江边河谷外,坝区和山区分布广,为害严重。一般发病率为5—10％,严重地块高达60％以上,侵染一株就损失一株,对产量影响很大。为了明确病菌传染与发病的关系和品种抗性遗传规律,特报道1980—1982年的研究结果如下。一、材料、方法与结果试验地设在本所内,菌种是上一年采集埋于土中的病穗。接种前,挖出病穗阴干,用细筛筛过。接种土壤用一般田土打碎过
Sphacelotheca reiliana (K (?) Ehn) Clint. Is widespread in China’s spring corn area. In Zhaotong area, except for riverfront valleys, the dam area and the mountainous area are widely distributed and severely damaged. The general incidence of 5-10%, a serious block up to 60% or more, a loss of a strain of infection, a great impact on the yield. In order to clarify the relationship between pathogen infection and pathogenesis and the genetic law of variety resistance, the results of the 1980-1982 study are reported as follows. First, the material, methods and results of the experiment is located in the Institute, the strain was collected in the previous year sick ear disease. Before inoculation, dug out ear dry, with a fine sieve. Inoculated with soil generally broken soil