Major Spreading Approaches of Tobacco Mosaic Virus in Flue-cured Tobacco Floating Seedbed System

The spreading approaches of TMV in flue-cured tobacco floating seedbed system were studied.The results showed that TMV spread mainly by clipping with very high efficiency,and clipping was the most important and effective approach of tobacco mosaic spreading in floating seedbed system.The infected seedling tray,nutrient solution and medium were major sources of TMV spreading in floating seedbed system,though the spreading efficiency was relatively lower.