是霉菌感染,这就是为什么。有办法治疗。苗一出来就喷杀霉菌的药,苗小的时候也定期喷。苗很大时,可以摘掉底下感染的叶子。
本帖于 2017-10-22 06:17:42 时间, 由普通用户 饿狼陀 编辑
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