云南烟草丛枝症病害是近年来在云南西部局部烟区流行的一种危险性病害。在烟区人们习惯称之为“烟草丛枝病”。病害有逐年蔓延扩大的趋势 ,在部分烟区造成毁灭性的损失 ,特别是流行发病的 1993、1996年和 1998年重病年 ,造成大面积减产 ,烤烟产值损失很大。烟草丛枝症病害在部? Tobacco bush witches disease in Yunnan is a dangerous disease endemic to some areas in the west of Yunnan in recent years. In the tobacco area, people used to call it “tobacco witches’ disease.” The diseases have the tendency of spreading and expanding year by year, causing devastating losses in some tobacco-growing areas. Especially, the epidemic diseases of 1993, 1996 and 1998 were seriously ill. As a result, large-scale yield reduction was caused and the output value of flue-cured tobacco was greatly lost. Tobacco bush disease in the ministry?