论文部分内容阅读
本试验从马来西亚和我国台湾、广州等地区采集土样２２８个，用常规平板稀释法分离，获得细菌菌株４２６个，在温室黄瓜苗期直接人工接种疫病菌进行测定，筛选出对黄瓜疫病有拮抗作用的细菌菌株Ｐ７８。其摇瓶发酵液在温室内人工接种条件下，防治黄瓜疫病效果平均达９５．２％；在田间小区中，Ｐ７８有效物质可防治丝瓜霜霉病，初提物稀释２０倍的防治效果可达到６４％。该菌株是分泌活性物质起作用的，其活性物质可耐高温和酸碱处理。
In this study, 228 soil samples were collected from Malaysia, Taiwan, Guangzhou and other regions of China. The bacterial strains were isolated by conventional plate dilution method. 426 bacterial strains were obtained, and the pathogen was directly inoculated in the greenhouse cucumber to determine the pathogen, The role of the bacterial strain P78. The shake flask fermentation broth under artificial inoculation conditions in the greenhouse, the cucumber disease control effect of an average of 95.2%; in the field plot, P78 effective material can control loofah downy mildew, 20 times the initial extract diluted control effect can be achieved 64%. The strain is active secretion of active substances, the active substance can be high temperature and acid-base treatment.