一、种性退化 目前，大蒜生产中存在严重的种性退化现象，其表现为：植株日趋矮小，假茎变细，叶色变淡、变小，小瓣蒜和独头蒜增多，提早枯黄植株增多，产量降低等。造成种性退化的原因主要有三方面：一是大蒜用蒜瓣进行无性繁殖，不经过有性世代，这是种性退化的主要原因；二 First, the degeneration of sex At present, the production of garlic there is a serious degenerative phenomenon, which showed: the growing dwarf plants, pseudostem thinning, leaf color fades, smaller, small petal garlic and single head increased garlic, early yellow Increased plants, reduced yields and more. There are three main reasons for the degenerative species degeneration: one is vegetative propagation of garlic with garlic cloves, which is the main reason of degenerative sex without passing through sexual generation;