烟草黑胫病菌对两种保护性杀菌剂的敏感性测定  

Determination on Sensitivity of Phytophthora nicotianae var.nicotianae to Two Unsystemic Fungicides

作　　者：许学明[1] 王开运[1] 林才华[1] 段海明[1] 迟志娟[1] 

机构地区：[1]山东农业大学植物保护学院

出　　处：《农药学学报》2007年第1期39-44,共6页Chinese Journal of Pesticide Science

基　　金：国家烟草专卖局重点项目(国烟科[2003]579号)

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 Breda de haan var.nicotianae Waterhouse菌株对两种保护性杀菌剂的敏感性。结果表明:百菌清(B)对各参试菌株的EC50值在2.33～49.47μg/mL之间,平均值为9.35(±2.77)μg/mL;代森锰锌(Z)对各参试菌株的EC50值在3.51～82.05μg/mL之间,平均值为10.59(±4.06)μg/mL。B及Z对除XR001外的37个菌株的EC50值分别呈连续的双峰(主峰明显)和单峰频次分布;B对构成敏感性正态频次分布主峰的30个菌株的EC50均值5.99(±0.78)μg/mL和Z对组成连续敏感性正态频次分布的37个菌株的EC50均值8.66(±1.09)μg/mL可分别作为烟草黑胫病菌对B及Z的敏感性基线。The sensitivities to chlorothalonil （B） and mancozeb （Z） of 38 strains of Phytophthora nicotianae Breda de haan var. nicotianae Waterhouse collected from tobacco plants in Yunnan, Guizhou, Shandong China in 2005 were determined with the method of colonial growth-rate. The results showed that the EC50 values of B and Z to all the strains ranged from 2.33 μg/mL to 49.47 μg/mL and from 3.51 μg/mL to 82.05 μg/mL,respectively;and the EC50 mean values were 9.35（±2.77） μg/mL and 10.59（±4.06） μg/mL,respectively. The frequency distributions of EC50 values of B and Z to 37 strains except of XR001 were bimodal with evident main peak and unimodal, respectively. The EC50 mean value （5.99 ± 0.78 μg/mL） of B to 30 strains, which composed the normal main peak of sensitivity distribution, and the EC50 mean value （ 8.66 ± 1.09 μg/mL） of Z to 37 strains, which composed the normal sensitivity distribution could be used as the baseline-sensitivity of Phytophthora nicotianae var. nicotianae to B and Z.

关 键 词：烟草黑胫病菌 保护性杀菌剂 百菌清 代森锰锌 敏感性基线 

分 类 号：S481.4[农业科学—农药学]