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问:我培养的一批根茎类秋海棠,有的根茎部和茎基部出现肿瘤,叶片小而衰弱,影响生育,怎样防治? 山东姜理中
Q: I cultivated a number of root begonias, and some roots and stems at the base of the tumor, the small and weak leaves, affecting fertility, how to prevent?