6种杀菌剂对甘蔗梢腐病菌和卷叶病菌的室内毒力测定  

Indoor toxicity determination of six fungicides on Fusarium moniliforme and Phoma sorghina var.saccharum

作　　者：李宇峰[1,2] 王海玄 李奕莎 商贺阳 LI Yufeng;WANG Haixuan;LI Yisha;SHANG Heyang(College of Agriculture,Guangxi University,Nanning,Guangxi 530004,China;State Key Laboratory for Conservation and Utilization of Subtropical Agro bioresources,Guangxi University,Nanning,Guangxi 530004,China;Beijing Huisheng Agricultural Science and Technology Co.Ltd.,Beijing 100026,China)

机构地区：[1]广西大学农学院,广西南宁530004 [2]广西大学亚热带农业生物资源保护与利用国家重点实验室,广西南宁530004 [3]北京辉胜农业科技有限公司,北京100026

出　　处：《亚热带农业研究》2017年第4期241-245,共5页Subtropical Agriculture Research

基　　金：国家自然科学基金地区科学基金项目(31460374)

摘　　要：采用菌丝生长速率法测定了50%嘧菌环胺水分散粒剂、50%啶酰菌胺水分散粒剂、240 g·L^(-1)噻呋酰胺悬浮剂、22.5%啶氧菌酯悬浮剂、430 g·L^(-1)戊唑醇悬浮剂和50%醚菌酯水分散粒剂共6种杀菌剂对甘蔗梢腐病菌和卷叶病菌的室内毒力。结果表明:22.5%啶氧菌酯悬浮剂对甘蔗梢腐病菌菌丝生长有很好的抑制作用,EC50值为0.469 9 mg·L^(-1),在试验设计的最大剂量下,对菌丝生长的抑制率达90.30%;50%啶酰菌胺水分散粒剂、50%嘧菌环胺水分散粒剂、240 g·L^(-1)噻呋酰胺悬浮剂和22.5%啶氧菌酯悬浮剂对甘蔗卷叶病菌菌丝生长有很好的抑制作用,EC50值分别为0.247 4、0.784 0、2.657 4和4.189 7 mg·L^(-1),在试验设计的最大剂量下,对菌丝生长的抑制率分别为93.45%、73.88%、79.21%和83.11%。可分别对22.5%啶氧菌酯悬浮剂和50%啶酰菌胺水分散粒剂、50%嘧菌环胺水分散粒剂、240 g·L^(-1)噻呋酰胺悬浮剂进一步开展防治甘蔗梢腐病和卷叶病的田间药效试验。The mycelial growth rate method was used to determine the indoor toxicity of six fungicides to the fungal pathogens of sugarcane pokkah boeng(Fusarium moniliforme)and twisted leaf(Phoma sorghina var.saccharum)diseases.These fungicides included50%cyprodinil water dispersible granule,50%boscalid water dispersible granule,240g·L-1thifluzamide suspension concentrate,22.5%picoxystrobin suspension concentrate,430g·L-1tebuconazole suspension concentrate,and50%kresoxim methyl water dispersible granule.The result showed that picoxystrobin strongly inhibited the growth of F.moniliforme with an EC50value of0.4699mg·L-1;and its inhibition rate reached up to90.30%at maximum concentration.Boscalid,cyprodinil,thifluzamide and picoxystrobin strongly inhibited the growth of P.sorghina var.saccharum with EC50values of0.2474,0.7840,2.6574and4.1897mg·L-1and inhibition rates of93.45%,73.88%,79.21%,and83.11%,respectively,at respective maximum concentration.However,the field fungicidal effect of picoxystrobin,boscalid,cyprodinil,and thifluzamide should be further investigated in sugarcane fields.

关 键 词：甘蔗梢腐病 串珠镰刀菌 甘蔗卷叶病 卷叶病菌 杀菌剂 毒力测定 

分 类 号：S482.2[农业科学—农药学]