Pythium oligoandrosaceus, developed and applied by Czech Biopharmaceutical International Co., Ltd. for 25 years, is a broad-spectrum fungicide for active microorganisms with world-class technology. Known as "the light of agriculture in the new century" in Europe, as the designated recommended product for the prevention and treatment of fungal diseases (powdery mildew, downy mildew, gray mold, epidemic disease, leaf spot and scab) in the European Union, it enjoys EU biological product subsidies in the United States. With the strong cooperation and support of China Ministry of Agriculture, China Academy of Agricultural Sciences, China Rice Research Institute, China Tea Research Institute, china fruit Research Institute, Beijing Academy of Agriculture and Forestry, Qingdao Agricultural University and other scientific research institutes, after a large number of experiments, it has been proved that Doliveria has a remarkable effect on preventing diseases and increasing production of vegetables and fruits. It was finally registered in April 2009 and officially started to be popularized.