白菜制种的花期管理很重要,田间繁种株经常会因无地膜覆盖、缺水、肥害、激素危害、病虫害和二茬花危害等导致生长不良或出现异常症状。相比之下,除草剂残留和矮壮素的危害具有更强的隐蔽性、突发性,黄萎病(疑似)、霜霉病、根肿病以及根部线虫亦均已在制种田发生,应该引起足够的重视。 Flowering cabbage seed management is very important, often in the field because of no variety of plant coverage of mulching, lack of water, fertilizer, hormones, pests and diseases and other plants caused by poor growth or abnormal symptoms. In contrast, herbicide residues and CCC are more invisible, and sudden, Verticillium wilt (suspected), downy mildew, clubroot, and root nematodes are all on-farm farming, Should cause enough attention.