我省马铃薯生产中病毒性退化是比较严重的,一般减产20—30%,重者减产70—80%。马铃薯退化是影响马铃薯高产稳产的主导因素。建国初期,为了解决这个问题采用大量北薯南调的方法,给交通运输部门带来了很大困难,造成了人力物力的极大浪费。1970年以后我省推广了“株系选、整薯种、夏播留”一整套防止马铃薯退化的留种措施,对马铃薯的生产起到一定作用。但由于这种措施是一 Viral degradation of potato production in our province is more serious, the general reduction of 20-30%, severe weight reduction of 70-80%. Potato degradation is the dominant factor affecting high and stable yield of potato. In the early years of the founding of New China, adopting a large number of methods of transferring south and north sweet potatoes to solve this problem brought great difficulties to the transportation department and caused a great waste of manpower and material resources. After 1970, our province promoted a set of measures to prevent the degeneration of potatoes and played a role in the production of potatoes. But because of this measure is one