Studies On Possibility Of Biological Pesticide Mixing With Chemical Pesticide To Control The Main Disease On Ginseng

China is the biggest country in ginseng production, and its production accounts for about two-third of the world total production. Most of the Chinese ginseng is mainly exported, and its market includes Europe, America, Southeast Asia, Japan, Hong Kong and Taiwan. However, ginseng market in Europe, United States and Japan are extremely strict with the pesticide residues of ginseng, which lead to limitation of ginseng exportation, and also affect economic This phenomenon has forced the ginseng industry to develop low pesticide residues and pollution-free. In China, ginseng diseases are predominately controlled by use of chemical. As result, long-term application of chemicals lead to pathogen resistance which affect quality and quantity of ginseng. In this study, sensitivity of ginseng pathogens on biological and chemical fungicides were tested. Field trial were also carried out in order to select high efficiency, low toxicity, low-residue pesticides and their ratios, so as to lay the foundation for the main disease control of ginseng.This study is of great significance for improving the ginseng quality, ensure the safety and sustainable development of ginseng industry, and improve the competitiveness of the Chinese ginseng in the international market. The results of the present study were as follows:1. The toxicity of 61 fungicides including biological and chemical fungicides to Rhizoctonia solani, Cylindrocarpon destructans, Fusarium solani, Sclerotinia schinseng, Phytophthora cactorum, Alternaria panax and Botrytis cinerea were tested by mycelium growth rate method, and higher inhibitory fungicides were screened out.2. On the basis of a single dose of screening results, combined with the mechanism of the different fungicides, considering the production practice, chemical and biological fungicides of higher inhibitory fungicides were mixed at different proportion. The toxicity of the ratio of reagents to different pathogens were tested by mycelium growth rate method so that to screen out better ratio of reagents, to provide theoretical basis for the field efficacy trials.3. According to the results of indoor toxicity measurement, fungicides and proportions of high control effect, low residual and poison, no pollution to the environment, safe for human were determined in field efficacy trials to R. solani、C. destructans、F. solani.