在我国,为害烟草的病害除烟草花叶病毒(TMV)和黄瓜花叶病毒(CMV)外,另一个分布广、为害较大的是马铃薯y病毒(PVY)。在田间烟草上的症状:发病初期新叶出现“脉明”,后期形成系统斑驳花叶,有些品种常在叶脉两侧出现深绿色带状斑。将PVY接种在普通烟、心叶烟、苋色藜、洋酸浆、大千生、蔓陀罗等寄主上均有病症表 In our country, apart from Tobacco mosaic virus (TMV) and cucumber mosaic virus (CMV), the diseases that harm tobacco are widely distributed, and potato y virus (PVY) is the most harmful one. Symptoms on tobacco in the field: the early onset of new leaves appear “pulse”, the late formation of mottled mosaic flowers, some species often appear on both sides of the veins dark green ribbon spot. The PVY vaccination in general tobacco, heart leaf tobacco, amaranth Chenopodium album, foreign physico-chemical pulp, Daqiansheng, such as Mandra and other host symptoms