17种杀菌剂对核桃根腐病菌的抑制作用及联合毒力  

Toxicities of 17 Fungicides and Joint Toxicity on Walnut Root Rot Fungus

作　　者：王凡[1] 胡奎[1] 江慧[1] 陈然[1] 李黎[1] 方洋[1] 刘先福[1] 李俊凯[1] 

机构地区：[1]长江大学农学院,湖北荆州434025

出　　处：《湖北农业科学》2015年第11期2648-2650,共3页Hubei Agricultural Sciences

基　　金：国家自然科学基金项目(30971948;31371976);湖北省自然科学基金重点项目(2014CFA105)

摘　　要：采用菌丝生长速率法测定17种杀菌剂原药对核桃根腐病菌的抑制作用以及噻菌灵和咪鲜胺复配后对核桃根腐病菌抑制作用的联合毒力。结果显示,噻菌灵、咪鲜胺、抑霉唑和甲基硫菌灵对核桃根腐病菌的抑制作用强,其中噻菌灵的抑制作用最强,EC50为0.092 6 mg/L;嘧菌酯、稻瘟灵和三唑酮对核桃根腐病菌的抑制作用最弱。噻菌灵与咪鲜胺按照1∶3、1∶5、1∶7的比例复配后对核桃根腐病菌菌丝生长抑制作用的共毒系数(CTC)分别为160.543 5、182.803 6和226.194 0,表现为增效作用,其中1∶7复配后增效作用最为显著。The inhibitory effect of 17 fungicides and co-toxicity between probenazole and prochloraz on walnut root rot fungus were determined by mycelium growth rate method. The results showed that probenazole, prochloraz, imazalil and thiophanate- methyl had stronger inhibitory effects among aU, the strongest inhibitory effect of probenazole with ECho of 0.092 6 mg/L. While azoxystrobin, isoprothiolane and triazolone had weakest inhibitory effect. When probenazole and prochloraz mixing ratios were 1：3,1：5 and 1：7, the co-toxicity efficient （CTC）was 160.543 5,182.803 6 and226.1940, respectively, of which the mix- ture of 1：7 was the most significant synergism.

关 键 词：杀菌剂 核桃根腐病菌 毒力测定 共毒系数 

分 类 号：S482.299[农业科学—农药学]