草坪腐霉枯萎病(Pythium diseases),又称油斑病、绵腐病或者絮疫病,是冷季型草坪的一种毁灭性病害。在夏季气温高、雨水多、湿度大、土壤含氮量高或碱性土壤,易加重病害的发生,严重发生时,能在一夜之间毁坏大面积的草坪,对景观效果破坏较为严重。现将其发病规律及防治方法介绍如下:症状该病能侵染草坪的各个部位,从种子到成株都会受害,染病时间越早,为害越大。种子 Grass lawn Pythium diseases, also known as spot blotch, cotton rot, or flock disease, are a devastating disease of cold-season lawns. In the summer when the temperature is high, the rain is heavy, the humidity is high, the soil is high in nitrogen or alkaline soil, it is easy to aggravate the occurrence of the disease. When a serious occurrence occurs, the large-area lawn can be destroyed overnight and the landscape effect is seriously damaged. Now its incidence and prevention methods are described below: Symptoms The disease can infect various parts of the lawn, from seed to adult will suffer, the earlier the disease, the greater the harm. seed