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近两年笔者选用10%氰霜唑悬浮剂进行防治大白菜根肿病的田间药效试验,结果显示其防效可达71%～86.8%,明显高于常规药剂75%百菌清可湿性粉剂(防效61%～76%)的药效,在大白菜根肿病重发区可作为高效杀菌剂与百菌清交替使用。氰霜唑以保护作用为主,持效期短,适宜在大白菜播后至5叶期使用(根据大白菜根肿病的发生规律,田间初侵染期为出苗后至5叶期),在大白菜5叶期后使用防效降低,不宜用于叶面喷施。大白菜全生育期一般用药2～3次,第一次在播种前拌毒土
In the past two years, the author selected 10% Cyazopylaxec suspension for prevention and treatment of cabbage clubroot field efficacy tests showed that the control effect of up to 71% ~ 86.8%, significantly higher than the conventional 75% chlorothalonil WP (61% to 76% control efficacy), cabbage clubroot disease recurrence zone can be used as an efficient bactericide and chlorothalonil alternate use. Cyazofamid is mainly protective effect with short persistence period, which is suitable to be used after cabbage sowing to 5-leaf stage (according to the occurrence of cabbage clubroot disease, the initial infection period in the field is from emergence to 5 leaves) Cabbage 5 leaf stage after the use of reduced control efficiency, should not be used for foliar spray. Chinese cabbage throughout the growing period of general medication 2 to 3 times, the first time before planting mixed with soil