[Objective] The occurring law and pathogenic factors of TMV for tobacco float seedling production in Anshun area were understand. [Method] The detection rate of TMV from main flue-cured tobacco planting areas,virus carried rate of seedlings in different greenhouses of seedling points and the surrounding environment of TMV high-incidence greenhouse in Anshun were investigated from 2011 to 2013.[Result]All the samples from each tobacco planting area of Anshun had certain virus carried rate; the risk sample ra...