不同药剂对玉米茎腐病的防效评价
Control Effect of Different Fungicides on Maize Stalk Rot
孙华 1边强 2郭宁 1石洁 1马红霞 1董跃广1
作者信息
- 1. 河北省农林科学院植物保护研究所/农业农村部华北北部作物有害生物综合治理重点实验室/河北省农业有害生物综合防治技术创新中心/河北省作物有害生物综合防治国际科技联合研究中心,河北保定 071000
- 2. 南开大学化学学院/农药国家工程研究中心,天津 300071
- 折叠
摘要
为筛选防治玉米茎腐病的有效药剂,采用菌丝生长法测定16种药剂对禾谷镰孢的室内毒力,并通过田间药效试验评价室内筛选出的药剂包衣种子对玉米茎腐病的防治效果.结果表明,在16种药剂中筛选出9种对禾谷镰孢的EC50小于5.0 mg/L,9种药剂包衣后均对种子安全、无药害.种菌唑、噻呋酰胺、溴菌腈、咯菌腈、咪鲜胺和多菌灵包衣处理对玉米植株有促生作用,种菌唑和溴菌腈对禾谷镰孢茎腐病的防治效果较好,其防效分别为81.69％和80.55％;噻呋酰胺对禾谷镰孢+腐霉共同引起茎腐病防效较好,其防效为80.09％.病原菌侵染时,药剂包衣处理的玉米植株茎粗增加,第2节节间长度降低,茎节的长粗比例显著降低.综上所述,种菌唑、溴菌腈和噻呋酰胺对玉米茎腐病的防效较好.
Abstract
The aims of this study was to screen of effective fungicides for control of maize stalk rot.The indoor toxicity of 16 fungicides against Fusarium graminearum were determined by mycelial growth method,and the con-trol effect of screened fungicides coated seeds on maize stalk rot was evaluated through field efficacy tests.The study showed that 9 fungicides with EC50 less than 5.0 mg/L were selected from 16 fungicides.All 9 fungicides were safe and harmless to seeds after coating.The coating of ipconazole,thiafuramide,bromothalonil,fludioxonil,pro-chloraz,phenamacril and carbendazim had growth promotion effect on maize.Ipconazole and bromothalonil had bet-ter control effects on maize stalk rot caused by F.graminearum and their control effects were 81.69％and 80.55％,respectively.The prevention effects of thiafuramide had better control effects on stalk rot caused by F.graminearum and Pythium sp.,the control effect was 80.09％.The thickness of the stem increased,the length of the second sec-tion decreased,and the ratio of length and thickness of the stalk significantly decreased by fungicides coating seeds when maize stalk infected by pathogen.With all that said,ipconazol,bromoxonitrile and thiafuramide have good con-trol effect on maize stalk rot.
关键词
玉米/茎腐病/种菌唑/溴菌腈/噻呋酰胺/防效Key words
Maize/Maize stalk rot/Ipconazole/Bromothalonil/Thiafuramide/Control effect引用本文复制引用
出版年
2024
NETL
NSTL
万方数据