Biological Activity of Several Fungicides against Ustilaginoidea virens  

几种杀菌剂对稻曲病菌生物学活性的初步研究（英文）

作　　者：苏贤岩[1] 陈雨[1] 任学祥[1] 张爱芳[1] 叶正和[1] 

机构地区：[1]安徽省农业科学院植物保护与农产品质量安全研究所,安徽合肥230031

出　　处：《Agricultural Science & Technology》2015年第10期2299-2303,共5页农业科学与技术（英文版）

基　　金：Supported by Agricultural S&T Innovation:Genetic Structure Analysis and Parasitism Fitness of U.virens in Anhui Province(14B1148);Special Fund for Talent Development:Pesticide Innovation and High-efficient Application Technology(13C1109)~~

摘　　要：[Objective] This study aims to screen for the high effective fungicides which could significantly decrease the disease incidence and disease index of rice false smut. [Method] The inhibitory activities of the fungicide against mycelial growth of Ustilaginoidea virens were measured to in vitro evaluate the ECho values. And 17 fungicides were sprayed to evaluate the efficacy and effect of the fungicides tested in the field trials on the rice characters, [Result] The results showed that epoxicona- zole, difenoconazole, propiconazole and procloraz exhibited high inhibitory activity against mycelial growth of Ustilaginoidea virens with the ECso values 0.04, 0.07, 0.12 and 0.11 pg/ml, respectively. The results of field trials showed that the efficacy of Wen- quning, and fungicides such as difenoconazole, prochloraz, propiconazole, epoxi- conazole and their mixtures in controlling rice false smut were all 70% or more. [Conclusion] The 17 tested fungicides behaved efficacy in controlling rice false smut and did not cause drug injury on leaves and grains of rice plants, sprayed when flag leaves of rice fully expanded.[目的]为了筛选出能够显著降低稻曲病发病率和病情指数的高效药剂,以及探寻防治适期。[方法]采用菌丝生长测定法测定药剂对稻曲病菌的生长抑制活性,求出不同药剂抑制菌丝生长的有效中浓度EC50;同时选取17种药剂进行喷药防治,评估其防效及对水稻产量等性状的影响。[结果]氟环唑、苯醚甲环唑、丙环唑和咪酰胺对稻曲病菌菌丝生长的抑制活性较高,EC50分别为0.04、0.07、0.12和0.11μg/ml;田间试验结果表明,纹曲宁、苯醚甲环唑、咪鲜胺、丙环唑、氟环唑等化学制剂及其复配制剂对稻曲病均有70%或以上的防效。[结论]所用17种药剂在水稻剑叶完全展开期进行喷雾防治对水稻稻曲病都有一定的防治效果,对水稻叶片和稻粒均无药害。

关 键 词：Rice false smut Ustilaginoidea virens Fungicides Biological activity Field efficacy 

分 类 号：S435.111.4[农业科学—农业昆虫与害虫防治]