近几年,北京市种植了大量的草坪绿地,草坪病虫害防治也就成为我们研究的新热点。经调查在北京草坪常见病害有腐霉病、锈病、钱斑病、褐斑病、轮纹斑病、枯萎病、猝倒病等,最严重的病害是腐霉病。由于北京草坪种植的主要品种是结缕草、高羊茅、早熟禾和黑麦草,虽然各品种抗热能力有差异,但其先天特性是夏季抗逆性差,每年盛夏极易感染腐霉病,造成斑秃或大面积黄枯,初期症状呈圆形褐色斑点,直径2～10cm,早晨有露水时观察被侵染的叶片,出现水浸 In recent years, Beijing has planted a large number of green lawns and lawn pest control has become a new hot spot for our research. The investigation of common lawn diseases in Beijing turf, rust, money spot disease, brown spot, round grain spot disease, blight, damping-off disease, the most serious disease is Pythium. As the main varieties of lawn growing in Beijing are Zoysia japonica, Tall fescue, Kentucky bluegrass and ryegrass, although their heat tolerance is different, their innate characteristic is their poor resistance in summer. They are extremely susceptible to Pythium, Caused by alopecia areata or large area yellow dead, the initial symptoms were round brown spots, diameter 2 ~ 10cm, the morning when the dew was observed in the infected leaves, the emergence of flooding