氨基寡糖素与4种化学杀菌剂复配对 大白菜霜霉病的田间防效  

Control Effects of Oligosaccharins Compounded with Four Chemical Fungicides against Peronospora parasitica on Chinese Cabbage in the Field

作　　者：骆雪梅 严凯 LUO Xuemei;YAN Kai(School of Biological Sciences and Technology,Liupanshui Normal University,Guizhou Liupanshui553004,China)

机构地区：[1]六盘水师范学院生物科学与技术学院,贵州六盘水553004

出　　处：《现代农药》2022年第4期66-69,共4页MODERN AGROCHEMICALS

基　　金：2019年贵州省大学生创新创业训练计划项目(20195201508)。

摘　　要：为了研制田间大白菜霜霉病防治药剂减施增效的混合药剂组合,通过5种商品杀菌剂单一和复配施药方法,研究不同药剂和药剂组合对大白菜霜霉病田间防效的影响。结果表明,40%苯甲·嘧菌酯悬浮剂和18%咪鲜·松脂铜水乳剂对田间大白菜霜霉病防效最佳,5%氨基寡糖素水剂单独使用对霜霉病防效较差。与单一商品农药处理相比,4种化学杀菌以50%的推荐剂量浓度与5%氨基寡糖素水剂混配适用对大白菜霜霉病病指防效高于4种化学杀菌剂的推荐浓度处理,其中5%氨基寡糖素水剂与50%推荐浓度的40%苯甲·嘧菌酯悬浮剂和18%咪鲜·松脂铜水乳剂混合处理在药后7 d的防效在93%以上,在14 d时的防效也高于85%,说明5%氨基寡糖素水剂与其他药剂复配施用对大白菜霜霉病有显著的减施增效作用,适用于田间大白菜霜霉病的防治。In order to develop a mixed fungicides with reduced application and synergistic effects to control downy mildew pathogen(Peronospora parasitica)of Chinese cabbage(Brassica rapa spp.Pekinensis)in the field,the control effects of single fungicides and their combinations were explored.The results showed that 40%difenoconazole·azoxystrobin SC and 18%prochloraz·copper rosin EW performanced best control effects on downy mildew of cabbage,while the control effect of 5%oligosaccharins AS was poor.Compared with the single commercial fungicide treatment,the control effect of four chemical fungicides of 50%recommended concentration mixed with oligosaccharins AS were significantly improved.Among them,the control effect of 5%oligosaccharins AS mixed with 40%difenoconazole·azoxystrobin SC and 18%prochloraz·copper rosin EW of 50%recommended concentration were more than 93%at 7 d and 85%at 14 d,indicating that the compound application of 5%oligosaccharins AS and other agents had a significant effect on reduced application and synergistic effects against downy mildew of Chinese cabbage,which was suitable for field control.

关 键 词：大白菜 霜霉病 杀菌剂 氨基寡糖素 减施增效 

分 类 号：S436.34[农业科学—农业昆虫与害虫防治] TQ455[农业科学—植物保护]