4种杀菌剂对玉米大斑凸脐孺孢病菌的室内毒力测定  

Laboratory Toxicity Test of 4 Kinds of Fungicides of Exserohilum Turcicum

作　　者：雷玉明[1,2] 郑天翔[1] 王玉萍[3] 杨芳兰[4] 柴文玉[5] 

机构地区：[1]河西学院农业与生物技术学院,甘肃张掖734000 [2]甘肃河西走廊特色资源利用重点实验室,甘肃张掖734000 [3]甘肃省金塔县农业技术推广中心,甘肃金塔735300 [4]甘肃省武威市农业技术推广中心,甘肃武威733000 [5]甘肃省酒泉市农业技术推广中心,甘肃酒泉735000

出　　处：《长江大学学报（自科版）（下旬）》2016年第7期8-11,2,共4页Journal of Yangtze University

基　　金：甘肃省农业科技创新项目(GNCX-2013-10);甘肃省科技重大专项(0801NKDA016)

摘　　要：采用室内生长速率法测定了4种杀菌剂对玉米大斑凸脐孺孢病菌(Exserohilum turcicum)的毒力。筛选出的2种有明显抑菌作用的药剂70%甲基硫菌灵WP和70%噁霉福美双WP,在5.0μg/mL和10.0μg/mL时抑菌菌率均达100%,在1.25μg/mL和2.5μg/mL时抑菌菌率分别达90.48%~99.05%和90.95%~99.29%,抑菌效果显著,其EC_(50)分别为0.5322μg/mL和0.4892μg/mL。The toxicity effect mycelium by inhibiting the growth of pathogenic bacteria in laboratory chlorothalonil of the four fungicides on Exserohilum turcicum was studied.The results showed that 2fungicides,70%thiophanate-methyl·thiram WP and 70% hymexazol·thiram WP,could inhibit the growth of Exserohilum turcicum obviously.At the concentration of 5.0μg/mL and 10.0μg/mL,the inhibition rate reached 100%.At the concentration of 1.25μg/mL and 2.5μg/mL,the inhibition rate reached 90.48%~99.05% and 90.95% ~99.29% respectively.The EC_(50) was 0.5322μg·mL^(-1)and0.4892μg·mL^(-1) respectively.

关 键 词：杀菌剂 毒力测定 EC50 玉米 凸脐孺孢病菌 

分 类 号：S482.2[农业科学—农药学]