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一、杀菌剂1.瑞毒霉:是内吸杀菌剂,它可被大白菜的根茎吸收,并双向传导,对白菜霜霉病有很好的防治效果。主要剂型有25%可湿性粉刺。35%拌种剂、58%瑞毒锰锌。用25%可湿性粉加水750～1000倍喷雾防治霜霉病,防效可达90%以上也可用用35%拌种剂以种子重量的0.2%用量拌种,防治苗期霜霉病有显著的效果,如用25%可湿性粉剂拌种.用量为种子量的0.3%。瑞毒霉较容易使病原菌产生抗性,因此最好与代森锌、代森锰混用。瑞毒霉的药效期长达10～14天,因此田间用药可10天喷1次。瑞毒锰锌可兼治白斑病,炭疽病、黑斑病等。
First, the fungicide 1. Risium mold: is a systemic fungicide, which can be Chinese cabbage rhizome absorption, and two-way conduction, cabbage downy mildew has a very good control effect. The main dosage form has 25% wet acne. 35% seed dressing, 58% rumen manganese zinc. With 25% wettable powder and water spray 750 ~ 1000 times the control of downy mildew, control effect of up to 90% can also be used with 35% seed dressing seed dosage 0.2% seed dressing, prevention and treatment of downy mildew was significant Of the effect, such as 25% wettable powder dressing seed dosage of 0.3%. Reese mildew is more susceptible to pathogenic bacteria, so it is best to mix with dexamethasone and dexmedetomidine. Rumex drug efficacy of up to 10 to 14 days, so the field can spray 10 days 10 times. Remini manganese and zinc can cure vitiligo, anthracnose, black spot and so on.