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经观察,沐阳县栽培地黄退化严重,占80%左右。其原因是花叶病、卷叶病所致。用无病毒种子和根茎芽尖繁殖法培育的植株,90%没有退化现象,获得高产。
After the observation, Muyang County cultivation of Rehmannia serious degeneration, accounting for about 80%. The reason is Mosaic disease, caused by curly leaf. Plants grown with virus-free seed and rhizome budding tips showed 90% no degradation and high yield.