烟草普通花叶病是我国烟区普遍发生的花叶型病毒病之一,也是一种世界性病害。该病易使烟叶内在品质下降,失去烘烤价值。一、危害症状花叶病先出现在新叶上,从叶基部开始,沿叶脉组织变浅绿色,呈半透明状,并逐步蔓延到整个叶片,形成花叶状。严重时叶面皱缩、扭曲,并出现各种畸形。叶面常伴有浓绿色斑泡,叶缘有时上卷,节距缩短,植株矮化,生长极为缓慢,顶部2~3片叶表现为大面积坏死。 Tobacco mosaic disease is common in China’s tobacco-growing mosaic virus disease is one of the world disease. The disease easily reduce the intrinsic quality of tobacco, loss of bake value. First, the hazard symptoms Mosaic disease first appeared in the new leaves, starting from the base of the leaves, along the vein tissue become pale green, translucent, and gradually spread to the entire leaves, the formation of mosaic. Serious folds folds, distorted, and a variety of deformities. Often accompanied by dark green leaf follicles, leaf margin sometimes coil, pitch shortening, dwarf plants, growth is extremely slow, the top 2 to 3 leaves showed massive necrosis.