6种药剂对谷瘟病室内毒力测定和田间防效评价
Toxicity of Six Chemical Fungicides against Magnaporthe oryzae and Their Field Control Effectiveness
任飞娥 1赵艳群 1武奇伟 1王富刚 2王晓燕 1李亚琼 1艾玉玉 1梁红琴3
作者信息
- 1. 榆林市农业技术服务中心,陕西 榆林 719000
- 2. 榆林学院 生命科学学院,陕西 榆林 719000
- 3. 神木市农业技术推广中心,陕西 神木 719300
- 折叠
摘要
分别利用菌丝生长速率法和常规喷雾法进行6 种杀菌剂对谷子谷瘟病菌的毒力测定以及田间病害防治试验,筛选防治谷瘟病具有良好防控作用的药剂.结果表明,在室内毒理测定中,两种杀菌剂对谷瘟病菌抑制效果较好,EC50 值均小于0.2 μg/mL,分别是450 g/L咪鲜胺水乳剂,EC50 值为0.176 1 μg/mL和42%唑醚·戊唑醇悬浮剂,EC50 值为0.045 8 μg/mL;40%春雷·噻唑锌悬浮剂抑制作用较差,EC50 值为 18.26μg/mL;在田间药效试验中,咪鲜胺的病株率和病情指数最低,防效最高为 79.61%,显著高于其他处理,其次是 200 g/L氟酰羟·苯甲唑悬浮剂和 42%唑醚·戊唑醇悬浮剂,防效分别是69.56%和 63.36%,40%稻瘟灵防效乳油最差,仅为 38.47%.建议选用咪鲜胺、氟酰羟·苯甲唑和唑醚·戊唑醇三种药剂进行轮换使用,有效防控谷瘟病.
Abstract
The toxicity of six fungicides to millet blast was determined by the mycelium growth rate method and conventional spray method.A field disease control test was conducted to screen the fungicides with good con-trol effects on millet blast.The results showed that two fungicides had a better inhibitory effect on Magnaporthe oryzae in the indoor toxicological tests.The EC50 values were less than 0.2 μg/mL,specifically for 450 g/L prochloraz and 0.176 1 μg/mL.The EC50 value of 42%pyraclostrobin·tebuconazole was 0.045 8 μg/mL,and the EC50 value of 40%kasugrel·zinc thiazole was 18.26 μg/mL.In the field efficacy test,the disease in-cidence and disease index for prochloraz were the lowest,with the highest control effect at 79.61%,significantly higher than other treatments.This was followed by pydiflumetofen·difenoconazole and pyraclostrobin·tebucon-azole,with control effects of 69.56%and 63.36%,respectively.The control effect of 40%isoprothiolane was the lowest at only 38.47%.In conclusion,for the prevention and control of rice blast,three agents,including prochloraz,pydiflumetofen·difenoconazole,and pyraclostrobin·tebuconazole,can be used in rotation,demon-strating good efficacy in the prevention and control of rice blast.
关键词
谷瘟病/杀菌剂/室内毒力/田间防效Key words
Magnaporthe oryzae/Fungicides/Indoor toxicity/Field efficacy引用本文复制引用
出版年
2024
NETL
NSTL
万方数据