仙女环(Fairy ring)是草坪上经常发生一种严重病害。该病是由多种土壤表层植物残渣和土壤习居的真菌引起的,最初只是依靠分解枯草层和有机质生长,不直接危害草坪草植株本身该病在几乎所有草坪草都有发生,有时病斑周边会长出一圈蘑菇,又称蘑菇圈,全国各地均有发生发病症状:在春末夏初,潮湿的草坪上会出现大小不一的暗绿色圆圈,圆圈的外围草坪草长势奇好,这些长势奇好的草坪草形成一条宽1 0～20 cm的带,在秋季 Fairy ring is a serious disease on the lawn. The disease is caused by fungi that colonize plant residues and soil from a variety of soil surfaces and originally relied on the decomposition of the subtilis layer and organic matter and does not directly affect the turfgrass plant itself. The disease occurs in almost all turf grasses, The surrounding will grow a circle of mushrooms, also known as mushroom circle, all over the country have occurred symptoms: in late spring and early summer, wet lawn will appear dark green circles of different sizes, the outer circle of lawn grass grows odd, These wonderful grass grows to form a wide band of 10-20 cm in autumn