植物根腐病是由尖镰孢、恶疫霉、立枯丝核菌、腐霉等病原侵染引起的一大病害,分布广、危害重、防治难度大。常用的化学农药防治,成本高、持效期短、环境污染大、而且效果差。经常大量施用化学农药,不但造成对环境的面源污染,而且还对土壤生态区系等造成严重破坏。尽量少用化学农药,生产无公害的农产品,是广大农产品消费者的要求,也是保护人类生存环境,农业经济发展的 Plant root rot is caused by Fusarium oxysporum, Phytophthora capsici, Rhizoctonia solani, Pythium and other pathogen infection caused a major disease, widely distributed, endangering heavy, difficult to control. Common chemical pesticide control, high cost, short duration, environmental pollution, and poor results. Frequent use of chemical pesticides in large quantities not only causes non-point source pollution to the environment but also causes serious damage to the soil ecological flora. Minimizing the use of chemical pesticides to produce pollution-free agricultural products is required by the vast number of consumers of agricultural products and also the protection of the living environment of mankind and the development of agricultural economy