什邡晒烟种植历史悠久,常年种植面积8-9万亩。自六十年代以来,晒烟生产一直受花叶病、脉斑病、灼斑花叶病为害,每隔一年大发生一次,常常造成大幅度减产降质。上述三种病害,经复旦大学生物系植物病毒研究室l和北京农牧渔业部植物检疫实验所鉴定,其病源均为马铃薯y病毒(组) Shifang sun tobacco cultivation has a long history of perennial planting area of ​​8-9 million mu. Since the 1960s, the production of sun-cured tobacco has been affected by mosaic disease, leaf spot disease and spot blotch disease, occurring once every other year and often resulting in a significant reduction in production and quality. The above-mentioned three diseases were identified by the plant virus research department of Department of Biology, Fudan University and Plant Quarantine Laboratory of Beijing Ministry of Agriculture, Animal Husbandry and Fisheries. The pathogenic sources were all potato y virus (group)