桑疫病又称黑枯病,烂头病。它是细菌性病害,其主要症状因受害(病菌侵入)部位不同丽有差别。 1.叶片:病菌从气孔侵入叶肉,由于受叶脉限制而形成散发性多角形浅色病斑,对光透视呈半透明状,后变成黄褐色,周围叶肉稍退色,严重时叶片发黄,病叶自然脱落;病叶主脉或比较大的分枝脉受害,形成黑褐色病斑,叶片向背面卷曲绉缩成畸型,称“灯笼叶”或叫“打狗耳”,严重时病叶 Mulberry blight is also called black blight, rotten head disease. It is a bacterial disease, the main symptoms due to the victim (bacteria invade) different parts of different beauty. Leaf: the bacteria invade the mesophyll from the stomata, due to the limitations of the veins and the formation of sporadic polygonal pale spots, translucent light translucent, after turning into brown, around the flesh slightly fade, severe yellow leaves, Diseased leaves naturally fall off; the main artery of diseased leaves or larger branch vein damage, the formation of dark brown lesions, leaf curl back to the curling shrinkage into anomalies, called “lantern leaf” or “hit dog ears”, severe diseased leaves