摘要
采用菌丝生长速率法测定了氰烯菌酯、咯菌腈、丙硫菌唑和氟唑菌酰羟胺4种杀菌剂及其不同配比复配剂对禾谷镰孢菌的室内联合毒力。结果表明,氰烯菌酯、咯菌腈、丙硫菌唑和氟唑菌酰羟胺对禾谷镰孢菌的有效抑制中浓度(EC_(50))分别为0.2107、0.0253、1.7470和0.1267μg/mL。复配剂氟唑菌酰羟胺∶咯菌腈(1∶1、5∶1,V/V),氰烯菌酯∶咯菌腈(3∶1,V/V)具有增效作用,增效比(SR)在1.59~1.68,其中以氰烯菌酯和咯菌腈(3∶1,V/V)时增效作用最好,其SR值为1.68;其他不同比例的不同组合复配剂均表现为相加作用,其SR值范围为0.50~1.42。综上结果表明,氰烯菌酯、咯菌腈、丙硫菌唑和氟唑菌酰羟胺4种不同类型的杀菌剂可以通过交替或复配使用,阻止和延缓禾谷镰孢菌抗药性的进一步发展,为小麦赤霉病防控提供依据。
Toxicities of phenamicril,fludioxonil,prothioconazole and pydiflumetofen,and their mixtures to Fusarium graminearum from wheat were detected by the method of mycelial growth assay in vitro.The results showed that the EC_(50) values for phenamacril,fludioxonil,prothioconazole and pydiflumetofen were 0.2107,0.0253,1.7470 and 0.1267μg/mL,respectively.When pydiflumetofen and fludioxonil at the ratio of 1∶1 and 5∶1 by volume,as well as phenamicril and fludioxonil at the ratio of 3∶1 by volume demonstrated synergistic inhibition effect,with the synergy ratio ranging from 1.59 to 1.68.Among these,the mixtures of phenamicril and fludioxonil(3∶1,V/V)had the highest inhibition activity against F.graminearum at the synergy ratio of 1.68.The synergy ratio of other mixtures was 0.50 to 1.42,indicating additive inhibition.The results indicated that phenamicril,fludioxonil,prothioconazole and pydiflumetofen,and their mixtures could be used alternately in controlling the fusarium head blight of wheat caused by F.graminearum and delaying fungicide resistance further development.
作者
王栓
陈金鹏
付刘元
姜佳
车志平
田月娥
刘圣明
陈根强
WANG Shuan;CHEN Jinpeng;FU Liuyuan;JIANG Jia;CHE Zhiping;TIAN Yue'e;LIU Shengming;Chen Genqiang(Department of Plant Protection,College of Horticulture and Plant Protection,Henan University of Science and Technology,Henan Luoyang471023,China)
出处
《现代农药》
CAS
2021年第5期51-55,共5页
MODERN AGROCHEMICALS
基金
河南省重大科技专项(201300111600)
河南省自然科学基金杰出青年基金项目(212300410015)
中原青年拔尖人才(ZYQR201912157)
河南省高校科技创新人才支持计划(20HASTIT033)
河南省高等学校青年骨干教师培养计划(2018GGJS051)。
关键词
小麦赤霉病
禾谷镰孢菌
杀菌剂
复配剂
fusarium head blight
Fusarium graminearum
fungicide
mixture
