摘要
[目的]筛选防治玉米大斑病的有效药剂,为病害防治提供理论依据。[方法]采用菌丝生长速率法,测定10种杀菌单剂和5种混剂对玉米大斑病菌的抑制作用,选择效果较好的药剂进行田间试验。[结果]10种杀菌单剂中丁香菌酯、吡唑醚菌酯、戊菌唑、戊唑醇和氟硅唑对玉米大斑病菌的EC_(50)值分别为0.033、0.068、0.042、0.093、0.025 mg/L,抑菌效果较好。丁香菌酯和戊唑醇的质量比为1∶3时,EC_(50)值为0.034 mg/L,增效值为4.99,表明2种药剂按1:3混配后表现为很好的增效作用。田间药效结果表明:丁香菌酯+戊唑醇1∶3(45+135 g a.i./hm^(2))时,对玉米大斑病的防效可达84.09%。[结论]丁香菌酯和戊唑醇二元混配对防治玉米大斑病具有增效作用,可有效控制病害发生,为农业生产提供科学指导。
[Aims]This study aims to screen outthe effective agents for the prevention and control of corn leaf spot disease and to provide a theoretical basis for disease prevention and control.[Methods]The mycelial growth rate method was used to determine the inhibitory effects of 10 single bactericidal agents and 5 mixtures on the pathogen of corn leaf spot pathogen,and the agents with better effects were selected for field trials.[Results]Among the 10 bactericidal agents,the EC_(50) values of syringomyzin,pyraclostrobin,penconazole,tebuconazole and flusilazole against Setosphaeriaturcicaare 0.033,0.068,0.042,0.093 and 0.025 mg/L,respectively.When the mass ratio of syringostrobin and tebuconazole is 1:3,the EC_(50) is 0.034 mg/L,and the synergistic value is 4.99,it showedthat the two medicaments have a good synergistic effect after being mixed according to 1:3.The field efficacy results showed that:when syringomycin+tebuconazole 1:3(45+135 g a.i./ha),the control effect of corn leaf spot disease could reach 84.09%.[Conclusions]The binary mixed pair of syringomycin and tebuconazole has a synergistic effect for control of corn leaf spot disease,it can effectively control the occurrence of diseases and provide scientific guidance for agricultural production.
作者
潘文轩
王索
张思胜
张浩
许允成
张祥辉
PAN Wen-xuan;WANG Suo;ZHANG Si-sheng;ZHANG Hao;XU Run-cheng;ZHANG Xiang-hui(College of Plant Protection,Jilin Agricultural University,Changchun 130118,China;College of Resource and Environment,Jilin Agricultural University,Changchun 130118,China;College of Plant Science,Jilin University,Changchun 130062,China)
出处
《农药》
CAS
CSCD
北大核心
2021年第5期375-378,共4页
Agrochemicals
基金
“十三五”国家重点研发计划项目(2017YFD0201802)
吉林省科技厅科技攻关项目(20190301063NY)。
关键词
玉米大斑病
杀菌剂
生物活性测定
复配
田间药效
northern leaf blight of corn
fungicides
toxicity determination
combination
field control effects
