烟草赤星病是烟草生育后期的一种真菌性病害。９０年代以来，我省各产烟区赤星病的发生日益严重，烟叶发病率达８０％以上，导致烤烟质量下降１—２个等级，重病区减产减值达５０％以上，已成为优质烟生产的主要障碍，各地必须引起高度的重视，加大防治力度。一、症状烟草... Tobacco brown spot disease is a fungal disease later in tobacco growth. Since the 1990s, the occurrence of brown spot disease in various tobacco growing areas in our province has become more and more serious. The incidence of tobacco is more than 80%, which leads to 1-2 levels of quality decline in flue-cured tobacco. More than 50% The major obstacles must be given high priority all over the country and greater prevention and control efforts should be stepped up. First, the symptoms of tobacco ...