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当前位置: 首页 > 文章 > 荔枝霜疫霉菌对烯酰吗啉的敏感性测定 广东农业科学 2014,41 (2) 93-97
Position: Home > Articles > Sensitivity of Peronophythora litchii to dimethomorph Guangdong Agricultural Sciences 2014,41 (2) 93-97

荔枝霜疫霉菌对烯酰吗啉的敏感性测定

作  者：
易赛;潘汝谦;徐大高;凌金锋;彭埃天;习平根;姜子德
单  位：
广东省农科院植物保护研究所/广东省植物保护新技术重点实验室;华南农业大学资源环境学院
关键词：
荔枝霜疫霉菌;烯酰吗啉;敏感性
摘  要：
荔枝霜疫霉病是荔枝最重要的病害之一,烯酰吗啉用于防治该病害。采用生长速率法测定了烯酰吗啉对2009—2012年采自广东、广西、福建和云南等地区的115个荔枝霜疫霉菌菌株的有效抑制中浓度值(EC50值),结果表明:各菌株的EC50值介于0.0977~0.2226μg/mL之间,平均为0.1702(±0.0026)μg/mL,最不敏感菌株的EC50值是最敏感菌株的2.28倍;所有菌株的EC50值频率分布呈连续单峰曲线,表明无抗药性亚群体。
译  名：
Sensitivity of Peronophythora litchii to dimethomorph
作  者：
YI Sai;PAN Ru-qian;XU Da-gao;LING Jin-feng;PENG Ai-tian;XI Ping-gen;JIANG Zi-de;College of Natural Resources and Environment, South China Agricultural University;Plant Protection Research Institute, Guangdong Academy of Agricultural Sciences/Guangdong ProvincialKey Laboratory of High Technology for Plant Protection;
关键词：
Peronophythora litchii;;dimethomorph;;sensitivity
摘  要：
Litchi downy blight caused by Peronophythora litchii is one of the most prevalent diseases of litchi in China. Dimethomorph has been used to control the disease for more than 10 years. The survey of the fungicide resistance was conducted in this paper. The median effective concentration(EC50) values of dimethomorph to 115 isolates of P. litchii collected from Guangdong, Guangxi, Fujian and Yunnan during 2009 to 2012 were tested by mycelia radial growth inhibition method. The results showed that EC50values ranged from 0.0977 μg/mL to 0.2226 μg/mL. The average of EC50 value was 0.1702(±0.0026) μg/mL. The EC50value of the most insensitive isolate was 2.28 folds of the most sensitive one. The EC50value frequency of all tested isolates distributed as a continuous unimodel curve. It indicated that there was no resistant subpopulation among these isolates.

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