荞麦为蓼科荞麦属一年生草本植物,江苏省大面积生产上以甜荞为主,常年种植面积稳定在50万亩以上。一般作为轮作换茬作物,在“立秋”至“处暑”期间播种,小麦播种前收割。现将其常见病害症状及防治方法介绍如下。轮纹病在幼苗出土后就开始侵染危害,多在叶部发生,病斑呈圆形或椭圆形,红褐色,有同心轮纹,生黑褐色小点,严重时全叶呈褐色枯死状。该病还能侵害茎秆,病斑星梭形或椭圆形,红褐色,植株枯死后变黑色,生黑褐色小点, Buckwheat Polygonum buckwheat is an annual herb, Jiangsu Province, the production of mainly buckwheat, perennial planting area stabilized at 500000 mus of above. Crops are generally crop rotation, sowing during the “Autumn” to “summer”, wheat harvest before sowing. Now its common disease symptoms and prevention methods are described below. Chromosome disease began to infest the seedlings after the outbreak of damage, mostly in the leaf occurred, the lesion was round or oval, reddish-brown, concentric round pattern, dark brown spots, the whole leaf was brown withered . The disease can also affect the stems, fusiform or spindle oval-shaped, red-brown, black dead plants, dark brown spots,