玉米丝黑穗病 Sphacelotheca reilianavar.zeae 是生产上的重要病害。关于病原菌侵染条件及其与高粱丝黑穗菌交互侵染关系尚少资料。为给防治和抗病育种、品种合理布局提供依据,1978—1980年进行了这方面的试验。材料和方法一、侵染条件试验:分田间播期和控制条件两部分。田间播期试验:1978、1979年设五期处理;1980年四期处理。供试品种:前两年为白单4号(高感),1980年陕单1号(中感)。小区面积0.05亩,穴播,每穴两苗。土壤接种方法:0.1%菌土,播种时每穴100 Corn head smut Sphacelotheca reilianavar.zeae is a major production-related disease. On the infection conditions of pathogens and sorghum black spike cross infection is still little information. In order to provide a basis for the prevention and control of disease-resistant breeding and the rational distribution of cultivars, this kind of experiment was conducted in 1978-1980. Materials and methods First, the infection conditions test: sub-field sowing and control conditions in two parts. Field sowing date test: 1978, 1979 set five treatment; 1980 four treatment. Test varieties: the first two years for the white No. 4 (high sense), Shan Shan No. 1 in 1980 (in flu). Area of ​​0.05 acres of plot, sowing, two holes per hole. Soil inoculation method: 0.1% bacteria, planting 100 per hole