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当前位置: 首页 > 文章 > 烟草黑胫病菌对三种内吸性杀菌剂的敏感性测定 植物保护学报 2007,34 (2) 193-198
Position: Home > Articles > Determination on sensitivity of Phytophthora nicotianae var. nicotianae to three systemic fungicides Journal of Plant Protection 2007,34 (2) 193-198

烟草黑胫病菌对三种内吸性杀菌剂的敏感性测定

作  者：
许学明;王开运;林才华;段海明;迟志娟
单  位：
山东农业大学植物保护学院
关键词：
烟草黑胫病菌;内吸性杀菌剂;甲霜灵;霜脲氰;乙膦铝;敏感性基线
摘  要：
采用菌落生长速率法测定了2005年从云南、贵州、山东烟区病株上分离到的38个烟草黑胫病菌Phytophthora nicotianae var.nicotianae菌株对三种内吸性杀菌剂的敏感性。结果表明:甲霜灵、霜脲氰和乙膦铝对38个菌株的EC50值均呈单峰频次分布,分别分布在0.0867～1.6781、24.042～62.663和60.468～239.51μg/mL之间,均值分别为0.2991±0.0842、35.891±2.7823和105.73±11.154μg/mL;烟草黑胫病菌对甲霜灵、霜脲氰和乙膦铝的敏感性高,未出现敏感性下降的抗药性亚群体。敏感性频次分析结果表明:甲霜灵、霜脲氰和乙膦铝分别对组成连续单峰频次分布的34、37、37个菌株的EC50均值为0.2389±0.0292、35.167±2.4317、102.11±8.6497μg/mL,可分别作为烟草黑胫病菌对甲霜灵、霜脲氰和乙膦铝的敏感性基线。
译  名：
Determination on sensitivity of Phytophthora nicotianae var. nicotianae to three systemic fungicides
作  者：
XU Xue-ming1, 2 WANG Kai-yun1 LIN Cai-hua1 DUAN Hai-ming1 CHI Zhi-juan1 (1.College of Plant Protection, Shandong Agricultural University, Tai’an 271018, Shandong Province, China; 2.Lianyungang Technical College, Lianyungang 222006, Jiangsu Province, China)
关键词：
Phytophthora nicotianae var. nicotianae; systemic fungicide; metalaxyl; cymoxanil; fosetyl-Al; baseline-sensitivity
摘  要：
The sensitivities to metalaxyl, cymoxanil and fosetyl-Al of the 38 strains of Phytophthora nicotianae var.nicotianae collected from tobacco plants in Yunnan, Guizhou, Shandong, China in 2005 were determined with the method of colonial growth-rate. The frequency distributions of EC50 values to the 38 strains of three fungicides were all unimodal and the EC50 values ranged from 0.0867 μg/mL to 1.6781 μg/mL, from 24.042 μg/mL to 62.663 μg/mL and from 60.468 μg/mL to 239.51 μg/mL and the mean EC50 values (±Se×t0.05) were 0.2991±0.0842 μg/mL, 35.891±2.7823 μg/mL and 105.73±11.154 μg/mL respectively. The results of frequency-analysis showed that there were high sensitivities to metalaxyl, cymoxanil and fosetyl-Al in Phytophthora nicotianae var. nicotianae and no resistant subcolony had been discovered. The mean EC50 values (±Se×t0.05) of metalaxyl, cymoxanil and fosetyl-Al to the 34, 37, 37 strains, which composed the continuous unimodal distributions-sensitivity, were 0.2389±0.0292 μg/mL, 35.167±2.4317 μg/mL and 102.11±8.6497 μg/mL. They could be used as the baselines-sensitivity to metalaxyl, cymoxanil and fosetyl-Al of Phytophthora nicotianae var.nicotianae respectively.

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