马铃薯退化的类型,大致可以分为:皱缩花叶型、卷叶型、矮生型,丛生型等。这些类型因退化程度不同其表现程度也不同,在实际工作中常将某一类型采取分级的办法,来帮助鉴定马铃薯退化的情况。一般标准分为0～4级。级数越大退化越严重,现以常见的皱缩花叶型和卷叶型为例,列表说明如下: The types of potato degradation can be broadly divided into: crimped mosaic type, curly leaf type, dwarf type, tufted and so on. These types of different degrees of degeneration due to their performance level is also different, in practice often take a certain type of classification approach to help identify the degradation of potatoes. The general standard is divided into 0 ~ 4 level. The larger the series, the more serious the degradation. Now, the common wrinkled mosaic and curled leaves are listed as follows: