摘要
2007年8—10月从山东主要苹果产区轮纹病果上分离获得50个苹果轮纹病菌菌株,采用菌丝生长速率法分别测定了各菌株对异菌脲的敏感性。结果表明:异菌脲对50个菌株的EC50值呈单峰频次分布,在0.3061～0.8285mg/L之间,均值为(0.5567±0.0312)mg/L;在50个菌株中选择对异菌脲最敏感的泰山海棠菌系进行重复测定,将其EC50平均值0.4511mg/L确定为苹果轮纹病菌对异菌脲的敏感基线;通过Duncan氏新复极差法和系统聚类分析结果表明:不同地理来源的苹果轮纹病菌对异菌脲的敏感性都处在较高水平,总体上不存在明显差异,没有出现敏感性下降的抗药性亚群体。
The sensitivities to iprodione of the 50 strains of Botryosphaeria berengriana f. sp. piricola collected from apple fruits in Shandong, China in 2007 were determined with the method of colonial growth-rate. The frequency distributions of EC50 values to the 50 strains of iprodione were all unimodal and the EC50 values ranged from 0.306 1 to 0.828 5 mg/L and the mean EC50 values were （0.556 7±0.031 2） mg/L. The sensitive baseline of Botryosphaeria berengriana f. sp. pirieola to carbendazim was determined as 0.451 1 mg/L based on the mean EC50 value to the most sensitive isolate from Taishan. The results of Duncan test and hierarchical cluster analysis showed that the sensitivities to iprodione of Botryosphaeria berengriana f. sp. piricola from different regions were in high levels. There was no evident difference in the strains and no resistant subcolony.
出处
《农药》
CAS
北大核心
2009年第10期774-776,共3页
Agrochemicals
基金
公益性行业(农业)科研专项(nyhyzx07-055)
关键词
苹果轮纹病菌
异菌脲
敏感性基线
Botryosphaetqa berengriana f. sp. piricola
iprodione
sensitive baseline
