%0 Journal Article
%T 不同杀菌剂对拟枝孢镰刀菌的毒力测定及田间防效<br>Toxicity measurement and field control of alfalfa root rot Fusarium sporotrichioide
%A 潘龙其
%A 张丽
%A 袁庆华
%A 王瑜
%A 苗丽宏
%A 马甲强
%J 中国农业大学学报（自然科学中文版)
%D 2016
%X 为筛选高效防治紫花苜蓿根腐病的药剂,选用不同杀菌剂对拟枝孢镰刀菌进行室内毒力测定,盆栽药效试验和紫花苜蓿根腐病的大田防治试验。室内毒力测定结果表明:抑菌效果较好的分别是98%咯菌腈和98%戊唑醇,质量浓度为1.25μg/mL时,它们的抑菌率分别为90.11%和83.68%,抑菌效果较差的分别是98%嘧菌酯和97%恶霉灵。盆栽试验结果表明:98%咯菌腈的EC50值最小,为2.0603μg/mL,对紫花苜蓿拟枝孢镰刀菌的抑制作用最大。15个复配组合除组合4、8、9和10表现为相加作用外,其余组合均表现为增效作用。大田试验结果表明:50%咯菌腈和43%戊唑醇以有效剂量250 g/hm2的防效较好,其防效分别为69.42%和66.78%,50%咯菌腈和43%戊唑醇以有效剂量125和125 g/hm2复配具增效作用的同时防效较好,为71.39%。咯菌腈和戊唑醇等可作为大田防治紫花苜蓿根腐病的首选药剂。<br>The results showed that the fungicides of 98% fludioxonil and 98% tebuconazole had significant inhibitory effect on Fusarium sporotrichioide growth.The optimum concentration of these two fungicides was 1.25μ g/mL and theirinhibitory effects were 90.11% and 83.68%,respectively.However,the fungicides of 98% azoxystrobin and 97% hymexazol had lower inhibitory effect.Pot experiments indicated that 98% fludioxonil had significant inhibitory effect on F.sporotrichioide,and it EC50 was 2.06μg/mL.All fungicides combinations had synergy effect except combination 4,8,9 and 10.Field experiments indicated that the optimum concentrations of 50% fludioxonil and 43% tebuconazole to inhibit F. sporotrichioide growth was 250 g/hm2,which had higher control effect(69.42% and 66.78%) in field.While the combination of 50% fludioxonil(125 g/hm2) and 43% tebuconazole(125 g/hm2) had synergistic effect and better control effect,and its average control efficacy was 71.39%.
%K 紫花苜蓿根腐病 拟枝孢镰刀菌 毒力测定 防效&lt
%K br&gt
%K Alfalfa root rot Fusarium sporotrichioide toxicity measurement field experiment
%U http://zgnydxxb.ijournals.cn/zgnydxxb/ch/reader/view_abstract.aspx?file_no=20160111&flag=1