牧草是发展畜牧业的物质基础,它同所有植物一样,在其生长发育过程中要求适当的环境条件,也经常会受到病害的侵袭。当不适宜的环境条件超越了它们的适应范围,或受到病原物的侵染,牧草就不能正常地生长发育,表现出不同程度的病态,甚至死亡。种子带病是许多植物病害传播的重要方式 Forage grass is the material basis for the development of animal husbandry. Like all plants, forage requires proper environmental conditions during its growth and development and is often affected by diseases. When unfavorable environmental conditions are beyond their range of adaptation or are infested by pathogens, pasturage can not grow normally and display varying degrees of morbidity and even death. Seeds zoonosis is an important way for many plant diseases to spread