| 摘要: |
| 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。 |
| 关键词: 紫花苜蓿根腐病 拟枝孢镰刀菌 毒力测定 防效 |
| DOI：10.11841/j.issn.1007-4333.2016.01.11 |
| 投稿时间：2015-01-30 |
| 基金项目:公益性行业(农业)科研专项项目(201303057) |
|
| Toxicity measurement and field control of alfalfa root rot Fusarium sporotrichioide |
|
PAN Long-qi1,2, ZHANG Li1, YUAN Qing-hua1, WANG Yu1, MIAO Li-hong1, Ma Jia-qiang1
|
| (1.Institute of Animal Sciences of CAAS, Beijing 100193, China;2.Yichang Academy of Agricultural Sciences, Yichang 443004, China) |
| Abstract: |
| 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%. |
| Key words: Alfalfa root rot Fusarium sporotrichioide toxicity measurement field experiment |
