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70年代以来,油菜种植面积迅猛扩大,安徽省沿淮一带的老烟区,油菜与烤烟面积之比逐步增大,甚至超过了烟田面积。烟区发展一些油菜生产,可以增加菜籽饼,提高复种指数,错开农活,增加收入。但由于油菜面积扩大过份,使沿淮一带的春烟面积减少了一半。烤烟晚栽,首先使产量、质量明显下降。其次是油菜与烟草的花叶病互相传布,扩大了花叶病越冬毒源的基数,以致烟草花叶病逐年加重。
Since the 1970s, the planting area of rapeseed has expanded rapidly. The ratio of the area of old tobacco, rape and tobacco in the area along the Huaihe River in Anhui Province has gradually increased, even exceeding the area of tobacco fields. The development of some rapeseed area tobacco production, rapeseed can increase the pie, improve the multiple cropping index, stagger agricultural work, increase income. However, due to excessive expansion of rapeseed area, the area of spring smoke along the Huaihe River was reduced by half. Flue-cured tobacco late planted, first of all, yield, quality decreased significantly. Followed by rape and tobacco mosaic disease spread to each other, expanding the base of winter mosaic virus disease, resulting in increased year by year tobacco mosaic disease.