云南省昆明市马铃薯晚疫病菌甲霜灵抗药性监测  

Metalaxyl Sensitivity of Phytophthora infestans on Potato in Kunming,Yunnan

作　　者：霍超 曹继芬[2] 王昌命 赵志坚[2] HUO Chao;CAO Ji-fen;WANG Chang-ming(School of Life Sciences,Southwest Forestry University,Kunming,Yunnan 650224;Industrial Crops Institute,Yunnan Academy of Agricultural Sciences,Kunming,Yunnan 650205)

机构地区：[1]西南林业大学生命科学学院,云南昆明650224 [2]云南省农业科学院经济作物研究所,云南昆明650205

出　　处：《安徽农业科学》2018年第12期156-157,164,共3页Journal of Anhui Agricultural Sciences

基　　金：公益性行业(农业)科研专项(201303018)

摘　　要：[目的]明确云南省昆明市马铃薯晚疫病菌对甲霜灵的抗药性水平。[方法]采用含药平板法测定晚疫病菌对不同浓度甲霜灵的相对生长量。[结果]甲霜灵浓度为5、100μg/m L时,晚疫病菌相对生长量分别为59.24%~98.81%和43.25%~94.15%。52株马铃薯晚疫病菌全部为高抗菌,未检测到敏感和中抗菌株。[结论]甲霜灵在昆明马铃薯产区已完全失效,需引进新型高效杀菌剂进行晚疫病的合理防控。[Objective]To analyze the metalaxyl sensitivity of Phytophthora infestans collected from main potato production regions in Kunming,Yunnan.[Method]Fungicide-amended petri plates were used to measure the relative growth of P.infestans based on three different fungicide concentrations.[Result]The relative growth of P.infestans was 59.24%-98.81%on 5μg/mL metalaxyl-amended plates and 43.25%-94.15%on 100 g/mL metalaxyl-amended plates,respectively.All fifty-two isolates of P.infestans were high resistance strains,and no sensitive and moderately resistant isolates were detected.[Conclusion]The inhibition efficiency of metalaxyl to P.infestans has completely failed in Kunming.It is necessary to introduce and use new high efficient fungicides for rational management of late blight disease.

关 键 词：晚疫病菌 甲霜灵抗药性 马铃薯 

分 类 号：S435.32[农业科学—农业昆虫与害虫防治]