7种杀菌剂对马铃薯早疫病菌室内毒力及田间防效  

Inhibitory Effects of 7 fungicides on Alternaria solani and their Field Efficacy

作　　者：范子耀[1,2] 王文桥[3,2] 孟润杰[3,2] 韩秀英[3,2] 张小风[3,2] 马志强[3,2] 刘颖超[1] 

机构地区：[1]河北农业大学植物保护学院,河北保定071000 [2]河北省农业有害生物综合防治工程技术研究中心,河北保定071000 [3]河北省农林科学院植物保护研究所,河北保定071000

出　　处：《农药》2011年第7期531-533,共3页Agrochemicals

基　　金：现代农业产业技术体系建设专项"马铃薯产业技术体系病害防控"(nycytx-15)

摘　　要：[方法]采用菌丝生长速率法测定7种杀菌剂对马铃薯早疫病菌的抑制作用。[结果]结果表明:嘧菌酯与苯醚甲环唑混合物(质量比8∶5)对菌丝生长的抑制(EC50值为0.238 mg/L)作用最强,具有明显增效作用,显著高于其他6种杀菌剂;田间药效试验结果表明:4次施药7 d后,32.5%嘧菌酯.苯醚甲环唑SC对马铃薯早疫病的防治效果(95.33%)最为突出,显著高于其他杀菌剂。[结论]7种杀菌剂中嘧菌酯与苯醚甲环唑的混合物对早疫病具有较好的防治效果,可优选用于马铃薯早疫病的防治。[methods] The inhibitory activity of 7 fungicides against Alternaria solani causing potato early blight was determined by the mycelial growth rate test.[Results] The results showed that the inhibition activity（EC50 0.238 mg/L） of mixture of azoxystrobin and difenoconazole（8：5,w/w）to mycelial growth is much stronger than the other 6 fungicides and obvious synergistic effects exist between azoxystrobin and difenoconazole.The results of field trials on controlling efficacy showed that after 7 d after 4 applications,azoxystrobin·difenoconazole 32.5% SC exhibied significantly higher controlling efficacy（95.33%） against potato early blight than the other fungicides.[Conclusions] The mixture of azoxystrobin and difenoconazole among 7 kinds of fungicides had a better control effect on the potato early blight,and can be selected preferably to control potato early blight.

关 键 词：杀菌剂 马铃薯早疫病菌 抑制作用 联合毒力 防治效果 

分 类 号：S435.32[农业科学—农业昆虫与害虫防治]