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马铃薯的退化现象遍布世界栽培马铃薯的地区。退化症状或表现为縐缩花叶、株丛矮化,或呈叶片卷曲,组织斑枯坏死,以及产量降低等等。我国南北各地都有或轻或重程度的退化现象发生,尤其是江淮河汉平原地区,退化严重地障碍着马铃薯生产的发展。“春收秋丢,一年好和二、三年不行”的局面,似乎成为这个地区栽培马铃薯不可抗拒的规律。即使在气候条件适宜于马铃薯生长发育的东北北部,退化率也在10%左右。研究退化问题至今还是发展马铃薯生产的实际问题和理论问题。
Degradation of potatoes in all parts of the world potato cultivation areas. Degenerative symptoms or manifested as crepe mosaic, bush dwarf, or leaf curl, tissue necrosis, and yield reduction and so on. Degradation phenomenon of lightness or severity occurs in all parts of our country. Especially in the area of the Han River and the Han River, the degradation severely hinders the development of potato production. “Spring harvest autumn throw, a year and two or three years not” situation seems to be irresistible law of cultivation of potatoes in the region. Even in climatic conditions suitable for the growth and development of potatoes in northeastern North China, the degradation rate is also around 10%. Research on the problem of degeneration is still a practical and theoretical issue for the development of potato production.