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马铃薯退化现象在各地发生普通,据广灵、阳高、宁武、五寨、浑源、大同等地调查,一个新调进的品种,在上述地区连续栽培2—3午后,植株就表现花叶、捲叶、矮小、密丛,块莖变形、变小,毒病型的退化指数大增,产量急剧下降,所产薯块失去种用价值。省农科院大同杂粮研究所于1961—1962年用广灵里外黄品种作材料,进行了退化植株观察比较,试验结果看出:不退化株占4.6％,退化轻微株占9.3％,严重
Potato degeneration occurs in various places. According to the survey conducted by Guangling, Yanggao, Ningwu, Wuzhai, Hunyuan, Datong and other places, a newly introduced variety is cultivated in the above areas for 2-3 years. Leaves, curly leaves, dwarf, dense plexus, tuber deformation, smaller, toxic type of degeneration index increased sharply, the output dropped sharply, the production of potato loses value. Provincial Academy of Agricultural Sciences Datong miscellaneous grains Research Institute in 1961-1962 with wide Lingli yellow varieties as materials, the degradation of plants were observed and compared, the results showed that: non-degenerate strains accounted for 4.6%, slightly degenerated strains accounted for 9.3% of serious