水稻紫鞘症又称紫秆病,俗称“黑骨”,是洞庭湖区水稻大面积发生的一种新病症。特别是七十年代以来,为害逐年加重,一般损失1—2成,严重的3成以上。随着杂交稻的大面积推广,此病很有可能成为南方稻区的主要病害之一。 Purple sheath disease, also known as purple stalk disease, commonly known as “black bone” is a large area of ​​rice in Dongting Lake area a new condition. Especially since the seventies, the harm has been increasing year by year, with a general loss of 1-2% and a serious 30% or more. With the large-scale promotion of hybrid rice, the disease is likely to become one of the major diseases in southern rice.