赤斑病是蚕豆上的重要病害,主要引起落叶、幼荚和茎秆发黑干枯,使结荚率减少、空粒率增加。江苏省南通通州区蚕豆常年遭此病危害损失率在20%左右,重发年份损失率达40%以上,严重影响蚕豆产量和品质。今年开春后连续低温阴雨,田间湿度大,蚕豆赤斑病开始发病早,目前田间菌源充足,随着气温回升,病情发展将加快。 Red spot is an important disease on Vicia faba, causing mainly deciduous, young black pods and stems to dry, reducing the rate of podding and increasing the rate of empty grains. Tongzhou District, Nantong, Jiangsu Province, the annual loss of Vicia faba was affected by the disease at a loss rate of about 20%, and the annual loss rate of retransmission was over 40%, seriously affecting the yield and quality of Vicia faba. After the spring of this year, continuous low temperature and rainy days, field humidity, broad bean brown spot disease began early onset, the current bacterial sources sufficient, with the temperature rise, the disease will accelerate development.